WO2024037446A1 - Signal processing method and apparatus, and communication device - Google Patents
Signal processing method and apparatus, and communication device Download PDFInfo
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- WO2024037446A1 WO2024037446A1 PCT/CN2023/112530 CN2023112530W WO2024037446A1 WO 2024037446 A1 WO2024037446 A1 WO 2024037446A1 CN 2023112530 W CN2023112530 W CN 2023112530W WO 2024037446 A1 WO2024037446 A1 WO 2024037446A1
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- 238000004891 communication Methods 0.000 title claims abstract description 138
- 238000003672 processing method Methods 0.000 title claims abstract description 37
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
Definitions
- the present application belongs to the field of communication technology, and specifically relates to a signal processing method, device and communication equipment.
- Backscatter communication means that backscatter communication equipment uses radio frequency signals from other devices or the environment to perform signal modulation to transmit its own information.
- the symbiotic backscatter communication signal includes a primary signal and a secondary signal, where the primary signal is sent by the transmitting end device, the backscatter communication device receives the primary signal and generates a secondary signal through modulation, and finally backscatters the secondary signal. Since the demodulation process is relatively complex, only one of the primary signal and the secondary signal carries data in the related technology. This application considers and proposes a new scenario, that is, a scenario in which the primary signal carries data and the secondary signal also carries data.
- the receiving device cannot demodulate the data in the secondary signal, and when demodulating the primary signal
- the signal data uses the Maximum-Likelihood (ML) detection algorithm, linear detection algorithm and detection algorithm based on Successive Interference Cancellation (SIC) to demodulate the main signal.
- ML Maximum-Likelihood
- SIC Successive Interference Cancellation
- Embodiments of the present application provide a signal processing method, device and communication equipment, which can solve the problem of how to simply demodulate symbiotic backscattered communication signals.
- the first aspect provides a signal processing method, including:
- the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal;
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
- the second aspect provides a signal processing method, including:
- the backscatter communication device receives a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks
- the modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals.
- a signal processing method including:
- the receiving end device acquires the first main signal, and performs coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal, so
- the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, and K is a positive Integers, N ⁇ 2, and M and N are positive integers;
- the receiving end device acquires the symbiotic backscatter modulation block, performs coherent demodulation processing on the symbiotic backscatter modulation block according to the first primary signal, and obtains data in the secondary signal, and M is a positive integer.
- a signal processing device applied to sending end equipment, including:
- the first modulation module is used for the sending end device to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
- a signal processing device for use in backscatter communication equipment, including:
- the first receiving module is used to receive the first main signal.
- the first main signal includes M modulation blocks.
- Each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N, and N is each The number of resource units included in the modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the second modulation module is used to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
- a signal processing device applied to receiving end equipment, including:
- the first processing module is used to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
- the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block.
- K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the second processing module is used to obtain the co-occurring backscattering modulation block, perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal, and obtain data in the secondary signal, and M is a positive integer.
- a terminal in a seventh aspect, includes a processor and a memory.
- the memory stores programs or instructions that can be run on the processor.
- the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in the first aspect, the second aspect or the third aspect.
- a terminal including a processor and a communication interface, wherein the processor is used to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the communication interface is used to receive a first main signal
- the first main signal includes M modulation blocks
- each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
- N is each The number of resource units included in the modulation block
- K is a positive integer
- N ⁇ 2 and M and N are positive integers
- the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal.
- the processor is configured for the receiving end device to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block.
- Quantity K is a positive integer, N ⁇ 2, and M and N are positive integers; obtain the co-occurring backscattering modulation block, and perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal to obtain The data in the secondary signal, and M is a positive integer.
- a network side device in a ninth aspect, includes a processor and a memory.
- the memory stores programs or instructions that can be run on the processor.
- the program or instructions are executed by the processor.
- a network side device including a processor and a communication interface, wherein the processor is used to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the communication interface is used to receive a first main signal
- the first main signal includes M modulation blocks
- each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
- N is each The number of resource units included in the modulation block
- K is a positive integer
- N ⁇ 2 and M and N are positive integers
- the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal.
- the processor is configured for the receiving end device to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block.
- Quantity K is a positive integer, N ⁇ 2, and M and N are positive integers; obtain the co-occurring backscattering modulation block, and perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal to obtain The data in the secondary signal, and M is a positive integer.
- a signal processing system including: a transmitting end device, a backscattering communication device, and a receiving end device.
- the transmitting end device can be used to perform the steps of the method described in the first aspect, wherein
- the backscatter communication device may be used to perform the steps of the method as described in the second aspect, and the receiving end device may be used to perform the steps of the method as described in the third aspect.
- a readable storage medium In a twelfth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented. The steps of the method as described in the second aspect, or the steps of implementing the method as described in the third aspect.
- a chip in a thirteenth aspect, includes a processor and a communication interface.
- the communication interface is coupled to the processor.
- the processor is used to run programs or instructions to implement the method described in the first aspect. method, or implement the method as described in the second aspect, or implement the method as described in the third aspect.
- a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect method, or implement the method described in the second aspect, or implement the method described in the third aspect.
- the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
- a primary signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the demodulated data of the first primary signal, thereby achieving simple demodulation of the primary signal and the symbiotic backscattering communication signal.
- the purpose of the secondary signal is
- Figure 1 shows a structural diagram of a communication system applicable to the embodiment of the present application
- FIG. 1 shows the sending and receiving scenarios of Passive IoT
- Figure 3 shows a schematic diagram of the primary signal and secondary signal in Passive IoT-related symbiotic backscattering
- Figure 4 shows a schematic diagram of Passive IoT symbiotic backscattering using beam forming
- FIG. 5 shows one of the schematic flow diagrams of the signal processing method according to the embodiment of the present application.
- Figure 6 shows a schematic diagram of the modulation of the main signal and the secondary signal in the time domain based on a single carrier in this application;
- Figure 7 shows a schematic diagram of the modulation of the main signal and the secondary signal in the frequency domain based on OFDM waveforms in this application;
- Figure 8 shows a schematic diagram of the design of the first reference signal in the main signal in this application.
- Figure 9 shows a schematic diagram of the modulation of the primary signal (including the first reference signal) and the secondary signal in the time domain based on a single carrier in this application;
- Figure 10 shows the modulation diagram of the main signal (including the first reference signal) in the frequency domain based on the OFDM waveform in this application;
- Figure 11 shows the second schematic flow chart of the signal processing method according to the embodiment of the present application.
- Figure 12 shows a schematic design diagram of the second reference signal in the secondary signal according to the embodiment of the present application.
- Figure 13 shows the third schematic flow chart of the signal processing method according to the embodiment of the present application.
- Figure 14 shows a schematic design diagram for the first reference signal and the second reference signal in the embodiment of the present application
- Figure 15 shows a schematic diagram of layered demodulation of the receiving end device in the embodiment of the present application.
- Figure 16 shows one of the module schematic diagrams of the signal processing device according to the embodiment of the present application.
- Figure 17 shows the second module schematic diagram of the signal processing device according to the embodiment of the present application.
- Figure 18 shows the third module schematic diagram of the signal processing device according to the embodiment of the present application.
- Figure 19 shows a structural block diagram of the communication device according to the embodiment of the present application.
- Figure 20 shows a structural block diagram of a terminal according to an embodiment of the present application.
- Figure 21 shows a structural block diagram of the network side device according to the embodiment of the present application.
- first, second, etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and “second” are distinguished objects It is usually one type, and the number of objects is not limited.
- the first object can be one or multiple.
- “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the related objects are in an "or” relationship.
- LTE Long Term Evolution
- LTE-Advanced, LTE-A Long Term Evolution
- LTE-A Long Term Evolution
- CDMA Code Division Multiple Access
- TDMA Time Division Multiple Access
- FDMA Frequency Division Multiple Access
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single-carrier Frequency Division Multiple Access
- NR New Radio
- FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable.
- the wireless communication system includes a terminal 11 and a network side device 12.
- the terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer.
- Tablet Personal Computer Tablet Personal Computer
- laptop computer laptop computer
- PDA Personal Digital Assistant
- PDA Personal Digital Assistant
- UMPC ultra-mobile personal computer
- UMPC mobile Internet device
- MID mobile Internet Device
- AR augmented reality
- VR virtual reality
- robots wearable devices
- WUE Vehicle User Equipment
- PUE Pedestrian User Equipment
- smart home home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.
- game consoles personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices.
- Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc.
- the network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless access network unit.
- Access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point or a Wireless Local Area Network (WiFi) node, etc.
- the base station may be called a Node B or an Evolved Node B (Evolved Node B).
- eNB access point
- BTS Base Transceiver Station
- BSS Basic Service Set
- ESS Extended Service Set
- home B node home evolved B node
- TRP Transmitting Receiving Point
- the base station is not limited to specific technical terms, and needs to be explained
- only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.
- Backscatter communication means that backscatter communication devices (such as tags) use radio frequency signals from other devices or the environment to perform signal modulation to transmit their own information.
- Backscatter communication equipment controls the reflection coefficient ⁇ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation.
- the reflection coefficient of the signal can be characterized as:
- Z 0 is the antenna characteristic impedance
- Z 1 is the load impedance.
- RFID Radio Frequency Identification
- IoT Internet of Things
- the forward link budget is defined as the amount of power received by the backscatter transmitter
- the backscatter link budget is the amount of power received by the backscatter receiver
- Backscatter communication systems can be divided into three main types: Monostatic Backscatter Communication System (MBCS), Bistatic Backscatter Communication System (BBCS) and ambient backscatter Communication system (Ambient Backscatter Communication System, ABCS).
- MBCS Monostatic Backscatter Communication System
- BBCS Bistatic Backscatter Communication System
- ABCS ambient backscatter Communication system
- bistatic backscatter communication is generally considered in Passive IoT signal transmission scenarios. If you consider the typical nodes (NR Node B, gNB) and user equipment (User Equipment, UE) in traditional cellular networks, and introduce passive IoT devices (i.e., Tags) into the cellular network, you can mainly consider the following two scenarios , that is, UE-assisted passive IoT scenario.
- NR Node B NR Node B
- UE User Equipment
- Scenario-1 gNB sends the primary signal (Primary Signal), x[n]. While receiving the primary signal, the UE also receives Reflect signal to Tag.
- the Tag reflection signal is modulated by the main signal received by the Tag and the secondary signal (Secondary Signal) B[m] sent by itself.
- Scenario-2 is that the UE sends the main signal, x[n], and the gNB receives the main signal and the Tag reflection signal at the same time.
- the Tag reflection signal is modulated by the main signal received by the Tag and the secondary signal B[m] sent by itself.
- the transmitting end Tx can be a gNB or a UE
- the receiving end Rx can be a corresponding UE or gNB.
- Tx is unified as gNB
- Rx is unified as UE for explanation.
- h 2 is the channel response from gNB to UE
- h 3 is the channel response from gNB reflected to UE through Tag
- w[n] is Additive White Gaussian Noise (AWGN) noise
- n 0,1, ..., NM-1
- m 0,1,...,M-1
- M is the number of symbols of the secondary signal
- N is the number of primary signals for each modulated secondary signal, as shown in Figure 3.
- AWGN Additive White Gaussian Noise
- the main signal x[n] can be transmitted through any waveform such as CDMA, TDMA, Orthogonal Frequency Division Multiplexing (OFDM), etc.
- CDMA Code Division Multiple Access
- TDMA Time Division Multiple Access
- OFDM Orthogonal Frequency Division Multiplexing
- the UE receiving end needs to detect the primary signal x[n] and the secondary signal B[m].
- the UE receiving end generally uses coherent reception algorithms, which can be divided into the following types, namely, Maximum-Likelihood (ML) detection algorithm, Linear Detector (Linear Detector) and Successive Interference Cancellation (SIC)-based detection algorithm.
- ML Maximum-Likelihood
- Linear Detector Linear Detector
- SIC Successive Interference Cancellation
- gNB can use the beamforming method to realize Passive IoT signal transmission, as shown in Figure 4.
- y[n] can is approximated as y[n] ⁇ h 3 B[m]x[n]+w[n];
- the signal processing method in the embodiment of the present application can be applied to the above-mentioned Scenario-1 and Scenario-2.
- Scenario-1 will be used as an example for description below, and the specific description of Scenario-2 will not be repeated.
- this application mainly describes centralized symbiotic backscatter communication, but the technology in this application can be extended to other scenarios, such as separated symbiotic backscatter communication.
- this embodiment of the present application provides a signal processing method, including:
- Step 501 The sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal. Number;
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
- each first reference signal corresponds to a resource unit in the modulation block.
- Each of the above modulation blocks corresponds to a secondary signal, and M secondary signals can be modulated through the above M modulation blocks.
- the above-mentioned sending end device may be a base station or a terminal.
- the first reference signal is used to recover the phase flip caused by the secondary signal.
- the first reference signal is also used to predict the amplitude and phase information of the channel.
- the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
- the main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal.
- the purpose of the signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal.
- the method also includes:
- the sending end device sends the first main signal.
- the symbiotic backscatter communication signal includes a primary signal and a secondary signal.
- the primary signal x[n] carries modulation symbols based on Quadrature Amplitude Modulation (QAM) through a single carrier or multi-carrier transmission waveform.
- the secondary signal B[m] carries modulation symbols based on Binary Phase Shift Keying (BPSK) through a single carrier or multi-carrier transmission waveform.
- QAM Quadrature Amplitude Modulation
- BPSK Binary Phase Shift Keying
- the secondary signal can also carry QAM-based modulation symbols, but considering the complexity limit allowed by Tag (or Backscatter Device) in Passive IoT applications, BPSK modulation is mainly used in this application. method to proceed. However, this application can target all modulation methods, such as binary amplitude keying (OOK), QAM, differential amplitude keying (Differential Amplitude Shift Keying, DASK), differential phase shift keying (Differential Phase Shift) Keying (DPSK), Differential Amplitude and Phase-Shift Keying (DAPSK), etc.
- OOK binary amplitude keying
- QAM differential amplitude keying
- DASK differential amplitude keying
- DPSK differential Phase shift keying
- DAPSK Differential Amplitude and Phase-Shift Keying
- the above-mentioned modulation block may be a modulation block corresponding to the time domain signal of the main signal, or may be a modulation block corresponding to the frequency domain signal of the main signal.
- Figure 6 shows a schematic diagram of the modulation of the primary signal and secondary signal in the time domain based on a single carrier.
- the main signal x[n] is composed of a modulation block of length N.
- Each modulation block is composed of a minimum communication transmission time domain resource unit (can also be described as a resource element), such as a single carrier Pulse. That is, each modulation block includes N resource units.
- the main signal x[n] is sent from the transmitting end device (here, the base station is taken as an example), is received by the Tag, and modulated by BPSK to generate a secondary signal waveform, and finally backscattered.
- the size of the modulation block N can be notified to the UE by the gNB through L1 signaling or Media Access Control Element (MAC Control Element, MAC CE) signaling, or it can be carried out through Radio Resource Control (Radio Resource Control, RRC) configuration.
- MAC Control Element Media Access Control Element, MAC CE
- RRC Radio Resource Control
- the secondary signal B[m] is modulated on the received signal h 1 x(t) sent from gNB and received by Tag, where , h 1 is the channel response (Channel Response) from gNB to Tag.
- h 1 is the channel response (Channel Response) from gNB to Tag.
- the received signal h 1 x(t) is used as a communication propagation carrier to transmit the secondary signal B[m]. Therefore, the single-carrier backscattered signal of the secondary signal can be expressed as:
- p T (t) is the pulse waveform of the backscattered signal
- the signal waveform of x (t) can be a single carrier signal waveform or a multi-carrier signal waveform (such as OFDM waveform).
- Tag can use a multi-carrier waveform (eg, OFDM waveform) to perform BPSK modulation and backscatter on the secondary signal B[m].
- a multi-carrier waveform eg, OFDM waveform
- the advantage of using the OFDM waveform to perform BPSK modulation and backscattering on the secondary signal B[m] is that it can effectively combat the multipath fading effect, thereby improving the UE's reception performance of the backscattered signal.
- Figure 7 shows the modulation diagram of the main signal and the secondary signal in the frequency domain based on the OFDM carrier.
- the received main signal is a time domain signal with an OFDM waveform.
- Tag receives the OFDM time domain signal h 1 x(t) and converts the time domain signal into a frequency domain signal.
- the converted received frequency domain signal is expressed as:
- the frequency domain main signal X[q] is divided by modulation blocks of length N.
- Each modulation block is composed of minimum communication transmission frequency domain resource elements, such as OFDM subcarriers (OFDM Carrier).
- Tag performs BPSK modulation on the main frequency domain signal X[q] and generates a secondary signal frequency domain signal waveform, which can be expressed as:
- P T [q] is the waveform of the backscattered signal in the frequency domain.
- Tag converts the frequency domain signal X B [q] into a time domain signal x B [t] through the IDFT operation, which is expressed as:
- the OFDM time domain signal x B (t) is backscattered by the Tag to the UE.
- the demodulation of the main signal by the UE can be solved by the coherent reception algorithm described in the background art, such as ML detection algorithm, linear detection algorithm and SIC-based detection algorithm, its complexity is difficult to be satisfied in the system of related technologies. . Therefore, a more appropriate method is to effectively and simply solve the data demodulation problem of symbiotic backscatter communication through a certain degree of reference signal standardization design.
- the sending end device modulates the main signal in the symbiotic backscatter communication signal to obtain the first main signal, including:
- K first reference signals are inserted into each modulation block corresponding to the time domain signal to obtain the first main signal.
- the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal, including:
- K first reference signals are inserted into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
- the K reference signals in each modulation block correspond to one reference sequence, or the K reference signals in the first main signal K*M reference signals correspond to a reference sequence.
- each modulation block includes two reference signals
- the reference sequences corresponding to the two reference signals are 1, -1 or -1, 1, etc.
- each modulation block includes 2 reference signals, and M is 3, then the reference sequences corresponding to K*M reference signals may be 1, -1, 1, -1, 1, -1.
- the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
- the K first reference signals are placed at the front of each modulation block, so that the receiving end device can first obtain the first reference signal in each modulation block, and then use the first reference signal to analyze the subsequent ones in the modulation block.
- the data is demodulated.
- the K first reference signals can also be placed at any position of each straightening block, such as the last position, or one or more positions in the middle, etc. The selection of positions can be realized according to specific needs. This application will No specific limitation is made.
- the positions of the K first reference signals may be continuous or discontinuous.
- the method in the embodiment of this application also includes:
- At least one of N and K is determined according to L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
- the reference signal related to the primary signal is used to recover the phase flip caused by the secondary signal and predict the amplitude and phase information of the channel at the same time. Since the secondary signal is carried on the received primary signal and modulated by a time domain or frequency domain modulation block of length N, each modulation block needs to be allocated at least one resource element (e.g., a pulse of a single carrier) as a reference signal, that is, 1 ⁇ K ⁇ N, where K is the number of reference signal resource elements allocated to each modulation block.
- a resource element e.g., a pulse of a single carrier
- each time domain modulation block of length N needs to be allocated at least one resource element as a reference signal, that is, 1 ⁇ K ⁇ N.
- each frequency domain modulation block of length N needs to be allocated at least one resource element (such as OFDM subcarrier) as a reference signal, that is, 1 ⁇ K ⁇ N.
- the size of the modulation block N and the number of resource elements K of the reference signal in each modulation block can be notified through L1 signaling or MAC CE signaling, or configured through RRC.
- the reference signal in each modulation block The reference sequence can be configured, and the reference sequence configuration can be performed through RRC.
- the BPSK phase inversion factor of each modulation block unit must be considered in channel estimation. Therefore, the UE needs to perform channel estimation in units of modulation blocks, and channel cooperative estimation cannot be performed between modulation blocks.
- the execution of channel estimation can be simply based on the channel estimation of LS, and the overall channel includes gNB-Tag-UE channel and BPSK modulation phase inversion. Since the modulation block channel collaborative estimation cannot be performed, compared with the minimum mean square error (MMSE) channel collaborative estimation, the signal-to-noise ratio (Signal to Noise Ratio) of the least squares (Least Square, LS) channel estimation, SNR) degradation is about 4dB.
- MMSE minimum mean square error
- the secondary signal is modulated by the received primary signal.
- the primary signal after inserting the reference signal is sent from the gNB, received by the Tag, BPSK modulated and generates the secondary signal waveform, and finally backscattered. Therefore, the waveform used in symbiotic backscatter communication is a single-carrier signal waveform.
- the carrier signal waveform of the main signal can be a single carrier time domain signal or a multi-carrier time domain signal.
- Figure 9 shows the modulation process of the main signal (including the first reference signal) and the secondary signal in the time domain based on the single carrier signal waveform. That is, the solution shown in Figure 9 corresponds to the first optional implementation method mentioned above.
- gNB sends the primary signal x[n], which is received by Tag, and performs BPSK modulation on the secondary signal data symbols and generates the secondary signal single carrier signal waveform, and finally backscatters.
- Tag does not need to be processed by Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT). Modulation performs time domain processing directly on the received main signal, so the complexity of Tag is relatively low.
- DFT Discrete Fourier Transform
- IDFT Inverse Discrete Fourier Transform
- the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is expressed as:
- the single-carrier backscatter signal of the sub-signal is defined in Formula 1, h 2 is the channel response from gNB to UE, h 3 is the channel response from Tag to UE, and w[n] is the AWGN noise.
- the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as:
- Figure 10 shows the main signal (including the first reference signal) and the secondary signal in the frequency domain based on the multi-carrier signal waveform. modulation process.
- gNB sends the main signal x[n], which is received by Tag.
- Tag first performs a DFT operation on the received signal h 1 x(t), so that the time domain signal is converted into a frequency domain signal X[q]. Then the secondary signal data symbols are subjected to BPSK modulation in the frequency domain and the secondary signal multi-carrier signal waveform is generated, and the IDFT operation is performed, and finally backscattered.
- Tag modulates the multi-carrier signal waveform of secondary signal data symbols mainly to combat the multipath fading effect.
- Tags For symbiotic backscattered multi-carrier signals (such as OFDM signals), Tags need to be processed by DFT and IDFT, so the complexity of Tags is relatively high.
- the processing time delay of DFT and IDFT is at least one OFDM symbol length, this symbiotic backscattering method can be regarded as a non-instantaneous symbiotic backscattering system.
- x B (t) is the single-carrier backscatter signal of the secondary signal defined in Equation 4
- w[n] is the AWGN noise
- T Proc is the total processing time of the DFT and IDFT of the received signal at the Tag receiving end.
- the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as: y(t) ⁇ h 3 x B (t)+w(t);
- Tag can control the backscattering time when backscattering the secondary signal, such as Tag
- the secondary signal is backscattered after ⁇ NM time after receiving the main signal, that is, during ⁇ OFDM symbols, Tag performs DFT operation on the received main signal, modulation of the secondary signal, IDFT operation, and finally backscattering.
- the OFDM symbol length NM and the number of OFDM symbols ⁇ can be configured in advance, and the UE receiving end can know in advance the total modulation time of the secondary signal by the Tag, ⁇ NM. Therefore, the UE receiving end can effectively eliminate the x[n- ⁇ NM] term before detecting x[n] and B[m].
- the demodulation symbols of the main signal by the UE can be expressed as:
- n 2,3,...,N.
- the UE is able to demodulate the main signal data symbols
- the channel decoder (Channel Decoder) is used to decode the bit information of the main signal and obtain the main signal data bit information.
- co-occurring backscattered single-carrier signals or co-occurring backscattered multi-carrier signals
- gNB uses beamforming antennas to send main signals, or gNB-Tag, gNB-UE, Tag-UE link channels It is a multipath channel.
- the UE can demodulate the main signal data symbols through the same demodulation method as above. Specifically, for the co-occurring backscattered single-carrier signal, the UE demodulates the main signal data symbols in the time domain, and for the co-occurring backscattered multi-carrier signal, the UE demodulates the main signal data symbols in the frequency domain. No detailed explanation will be given here.
- a first reference signal in units of secondary signal modulation blocks is inserted into the time domain signal or frequency domain signal of the main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
- the main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal.
- the purpose of the signal is inserted into the time domain signal or frequency domain signal of the main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
- the main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal. The purpose of the signal.
- the sending end device sends the first main signal, including:
- each group of transmission configuration information including carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
- the first main signal is sent according to the first set of transmission configuration information.
- the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
- the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
- the sending device selects the first set of transmission configuration information based on the carrier configuration information used by the sending device and the carrier configuration information used by the backscatter communication device from at least one set of configuration information. That is, the omnidirectional antenna configuration information of the transmitting end device corresponding to the carrier configuration information used by the transmitting end device and the carrier configuration information used by the backscattering communication device is selected from the above at least one set of configuration information.
- the method in the embodiment of this application also includes:
- the at least one set of transmission configuration information is updated according to the measurement quantity reporting information or the channel change information.
- the transmission configuration information is associated with at least one of the following:
- the at least one set of transmission configuration information may be configured by the base station according to the above content.
- gNB can have an omnidirectional antenna or a beamforming antenna to transmit the main signal x[n].
- gNB can carry the main signal modulation symbol x[n] through a single carrier or multiple carriers, and Tag can also carry the secondary signal modulation symbol B[m] through a single carrier or multiple carriers.
- QoS Quality-of-Service
- MBR Maximum transmission rate
- RRC configuration includes: configuration of QoS parameters, configuration of transmitting antenna, and configuration of gNB (or UE) and Tag carrier bearer. Among them, the configuration of the transmitting antenna and the carrier bearer configuration are determined according to QoS requirements.
- the relationship between the carrier bearer configuration of gNB (or UE) and the carrier bearer configuration of Tag is shown in Table 1. As can be seen from Table 1, there are not many restrictions on the combination of carrier bearer configurations, but from an implementation perspective, the consistency of the carrier bearer configuration relationships is different.
- the tag's carrier bearer configuration can depend on the single carrier bearer (i.e., carrier bearer option one) or on multi-carrier bearer (i.e., carrier bearer option two).
- the tag's carrier bearer configuration can rely on either a single carrier bearer (ie, carrier bearer option three) or multiple carrier bearers (ie, carrier bearer option four).
- ⁇ means that the carrier bearer configuration relationship between gNB (or UE) and Tag is the most consistent.
- ⁇ means that the carrier bearer configuration relationship between gNB (or UE) and Tag can be adopted, but it is not the optimal pairing.
- Each carrier carrying option has certain characteristics. When the tag's allowed capability is relatively low, the tag can only choose carrier bearer option one or carrier bearer option three, depending on the carrier bearer configured by the gNB (or UE) for the main signal. However, when the tag's allowed capability is relatively high, the tag can choose carrier bearer option 2 or carrier bearer option 4.
- the gNB or UE as the receiving end needs to be equipped with a highly complex equalizer to demodulate the co-occurring backscatter signals of the multipath channel. This situation generally applies to QoS services with relatively low requirements.
- the gNB or UE as the receiving end only needs to be equipped with a single-order equalizer (Single Tap Equalization) to counteract the characteristics of multipath channels through frequency domain processing methods to demodulate multiple The co-occurring backscatter signal of the path channel to provide overall co-occurring backscatter communication performance. This situation is generally for QoS services with relatively high requirements.
- gNB antenna configuration The relationship between gNB antenna configuration and carrier bearer options is shown in Table 2.
- Table 2 there are certain restrictions on transmitting antenna configurations for different carrier bearer options. For example, when selecting carrier bearer option one and carrier bearer option three, the transmitting antenna configuration can select omnidirectional antenna transmission. However, when selecting carrier bearer option two and carrier bearer option four, the transmitting antenna configuration is best to choose beamforming antenna transmission. This is because, in the case of omnidirectional antenna transmission, the gNB (or UE) receiving end must cancel the signal on the gNB-UE based on the previously demodulated main signal before demodulating the symbiotic backscattered communication signal. This requires relatively high reception complexity for the gNB (or UE) receiving end.
- the gNB (or UE) transmitter is best to configure beamforming to transmit the main signal in order to reduce the demodulation complexity of the receiver and thereby improve symbiotic backscatter Overall performance of communications. This situation is generally for QoS services with relatively high requirements.
- ⁇ means that the transmission combination selected by gNB (or UE) is the most suitable. 0 means that the transmission combination selected by gNB (or UE) is more suitable. ⁇ means that the transmission combination selected by gNB (or UE) can be adopted, but it is not very effective (for example, from the perspective of demodulation complexity at the receiving end, special design methods need to be used).
- gNB-Tag-UE changes and cannot meet the QoS requirements of symbiotic backscatter communication
- the transmission combination also needs to be changed.
- gNB The paired Tag and UE will be selected by positioning the Tag and UE.
- the ideal pairing is to keep the distance between Tag and UE as short as possible, because this can increase the overall channel gain between gNB-Tag-UE.
- Symbiotic backscatter communication adaptive technology can be considered as a technology that switches transmission combinations according to changes in link channels.
- the gNB may configure more than two transmission combinations according to service QoS requirements and Tag and/or UE capabilities. Based on the service QoS requirements, gNB selects a suitable transmission combination among the configured transmission combinations. During the service transmission process, gNB can dynamically schedule transmission combinations through L1 signaling or Medium Access Control (MAC) signaling based on the UE's measurement report (Measurement Report) information, and can also be reconfigured through RRC Staticly reconfigure the transmission combination to minimize the complexity of Tag and/or UE while meeting service QoS requirements.
- MAC Medium Access Control
- the transmission waveforms of the primary signal and the secondary signal can be effectively and adaptively adjusted according to the service QoS requirements and the mobility of the UE.
- the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively process the signal based on the first reference signal.
- the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal.
- signal and secondary signal and can effectively adaptively adjust the transmission waveforms of the primary signal and secondary signal.
- this embodiment of the present application also provides a signal processing method, including:
- Step 1101 The backscatter communication device receives the first main signal.
- the first main signal includes M modulation blocks.
- Each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N, and N is each The number of resource units included in each of the modulation blocks, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- Step 1102 The backscatter communication device modulates M secondary signals according to the first primary signal to obtain modulated secondary signals.
- the above-mentioned backscatter communication device may be specifically a Tag.
- the method further includes: the backscatter communication device sending the modulated secondary signal.
- the backscatter communication device backscatters the modulated secondary signal.
- the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal.
- the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
- the M secondary signals include a second reference signal, or include signals with the same length and phase. The opposite of the two second reference signals.
- the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1 ⁇ P ⁇ M/2.
- the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal
- the backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:
- the M secondary signals are modulated to obtain modulated secondary signals.
- the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal
- the backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:
- the primary signal is subjected to an inverse discrete Fourier transform (IDFT) process to obtain a modulated secondary signal.
- IDFT inverse discrete Fourier transform
- the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
- the above-mentioned one second reference signal or two second reference signals are located in the first P*N resource elements of the M secondary signals.
- the demodulated secondary signal also needs to be equipped with a corresponding reference signal (the above-mentioned second reference signal).
- a corresponding reference signal the above-mentioned second reference signal.
- Tag modulates each secondary signal data symbol on each modulation block, and then Tag backscatters the secondary signal with a length of M transmission blocks (modulation blocks) to the UE.
- M transmission blocks modulation blocks
- two second reference signals need to be equipped.
- the length of each second reference signal is the same as the length corresponding to the P modulation blocks, where P is Integer, 1 ⁇ P ⁇ M/2.
- the modulated signal may be a BPSK signal
- the modulated signal may be a BPSK signal
- Tag modulates the backscattered data symbol B[m], as shown in Figure 12.
- each second reference signal may additionally have a reference sequence, and the reference sequence configuration may be performed through RRC.
- the channel link phase for the Tag-UE must be guaranteed to be opposite.
- the estimated main signal and the copied main signal symbol is different.
- the former has a higher bit error rate, while the latter usually has a very low bit error rate due to the channel coding and decoding gain.
- the weighted average co-occurring backscatter modulation block signal can be approximated as:
- the UE can simply obtain the following signal:
- the UE can simply obtain the following signal:
- the UE can obtain the channel responses h 2 and h 3 .
- the channel coding gain can be improved by reducing the code rate (ie, Code Rate) of the main signal data symbols.
- the demodulation performance of secondary signal data symbols can be improved by selecting a larger modulation block N value to increase the processing gain (Processing Gain).
- the secondary signal data modulation method described in this application only needs to be performed through BPSK. In order to ensure coherent detection, secondary signal data transmission needs to be completed by sending a reference signal. Optionally, if the secondary signal data modulation uses DASK, DPSK, or DAPSK differential modulation methods, the secondary system can complete signal demodulation without adding a second reference signal.
- the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal.
- the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
- this embodiment of the present application also provides a signal processing method, including:
- Step 1301 The receiving end device acquires the first main signal, and performs coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
- the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
- the receiving end device may be a terminal or a base station.
- the sending end device is a base station
- the receiving end device is a terminal.
- the sending end device is a terminal
- the receiving end device is base station.
- Step 1302 The receiving end device obtains the symbiotic backscattering modulation block, performs coherent demodulation processing on the symbiotic backscattering modulation block according to the first primary signal, and obtains data in the secondary signal, and M is a positive integer. .
- the co-occurring backscatter modulation block includes a modulated secondary signal and a noise signal.
- the first main signal can be acquired first and then the symbiotic backscattering modulation block can be acquired, or the symbiotic backscattering modulation block can be acquired first and then the first main signal can be acquired, or the first main signal can be acquired at the same time.
- Main signal and co-occurring backscatter modulation blocks when processing the signal, the first main signal is first demodulated, and then the symbiotic backscattering modulation block is demodulated according to the demodulated first main signal.
- the receiving end device can simply and effectively perform coherent demodulation and decoding of the first main signal based on the first reference signal in the first main signal, and can further perform coherent demodulation and decoding of the demodulated first main signal based on the first reference signal in the first main signal.
- the data demodulates the secondary signal, thereby achieving the purpose of simply demodulating the primary signal and secondary signal in the symbiotic backscatter communication signal.
- perform coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain data in the main signal including:
- the channel decoder performs bit decoding processing on the first main signal estimated value to obtain the data in the first main signal (ie, the main signal data bit information ).
- the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
- Perform coherent demodulation processing on the modulated secondary signal according to the first main signal to obtain data in the secondary signal including:
- the processed co-occurring back-scattering modulation block is coherently demodulated according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain data in the secondary signal.
- the receiving end device performs coherent demodulation processing on the modulated secondary signal according to the first main signal to obtain the data in the secondary signal, which has been carried out in the embodiment of the backscatter communication device. Detailed description will not be repeated here.
- hierarchical demodulation at the UE receiving end is completed by setting reference signals in the primary signal and the secondary signal respectively.
- the Type-I reference signal first reference signal
- the Type-II reference signal second reference signal
- the UE In the hierarchical demodulation process of the digital symbols of the primary signal and the secondary signal, the UE first uses the demodulation method described in the transmitting end device embodiment to demodulate the digital symbols x[n] related to the primary signal, and then uses the backscatter communication equipment to implement The demodulation method described in the example demodulates the digital symbol B[m] associated with the secondary signal.
- T Proc is the processing time of DFT and IDFT of the received signal by the Tag receiving end.
- T Proc ⁇ 0 no detailed explanation will be given here. Because the UE receiving end only needs to perform cancellation processing on the gNB-UE signal based on the previously demodulated main signal, and then use the same layered demodulation method in the embodiment to demodulate the symbiotic backscatter communication signal.
- Figure 15 shows the layered demodulation process at the UE receiving end.
- the UE receiving end includes a primary signal receiver, a channel decoder, a group signal symbol replicator, a delayer, and a secondary signal receiver.
- T in the delayer is the overall processing time of the main signal receiver, channel decoder and main signal symbol replicator. Additionally, whether a DFT block is inserted in an embodiment depends on whether a single carrier or multiple carriers are used.
- the main signal receiver uses the Type-I reference signal to phase invert the received signal. Finally, the main signal receiver needs to perform a DFT operation to obtain the main signal modulation symbols in the frequency domain.
- the main signal receiver demodulates the main signal x[n] according to the reference signal inserted in the main signal to obtain the main signal estimate. Then the information bits are decoded through the channel decoder and the main signal data is obtained
- the secondary signal receiver passes through the primary signal data based on the symbiotic backscattered digital signal y[nT] delayed by T.
- main signal for symbol duplication Obtain the weighted average co-occurrence backscatter modulation block signal.
- the co-occurring backscatter modulation block signal can be approximated as
- the secondary signal B[m] is demodulated according to the Type-II reference signal inserted in the secondary signal to obtain the secondary signal estimate.
- the estimated main signal and the copied main signal symbol is different.
- the former has a higher bit error rate, while the latter usually has a very low bit error rate due to channel decoding gain.
- the receiving end device can simply and effectively respond to the first reference signal in the first main signal.
- the first main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the main signal in the symbiotic backscatter communication signal. and sub-signal purposes.
- the execution subject may be a signal processing device.
- a signal processing device executing a signal processing method is used as an example to illustrate the signal processing device provided by the embodiment of the present application.
- this embodiment of the present application provides a signal processing device 1600, which is applied to the sending end device and includes:
- the first modulation module 1601 is used by the sending end device to modulate the main signal in the symbiotic backscattering communication signal to obtain the first main signal;
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
- the device also includes:
- the first sending module is used to send the first main signal.
- the first modulation module includes:
- the first acquisition sub-module is used to acquire the time domain signal corresponding to the main signal
- a first dividing submodule used to divide the time domain signal into one or more modulation blocks
- the second acquisition submodule is used to insert K first reference signals into each modulation block corresponding to the time domain signal to obtain the first main signal.
- the first modulation module includes:
- the third acquisition sub-module is used to acquire the frequency domain signal corresponding to the main signal
- a second dividing submodule used to divide the frequency domain signal into one or more modulation blocks
- the fourth acquisition sub-module is used to insert K first reference signals into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
- K reference signals in each modulation block correspond to a reference sequence
- K*M reference signals in the first main signal correspond to a reference sequence
- the first sending module includes:
- a first selection submodule configured to select a first group of transmission configuration information from at least one group of transmission configuration information, where each group of transmission configuration information includes carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
- the first sending sub-module is configured to send the first main signal according to the first set of transmission configuration information.
- the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
- the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
- the transmission configuration information is associated with at least one of the following:
- the device of the embodiment of the present application also includes:
- An update module configured to update the at least one set of transmission configuration information according to measurement quantity reporting information or channel change information.
- the device of the embodiment of the present application also includes:
- the first determination module is used to determine at least one of N and K based on L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
- the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
- the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
- a primary signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the demodulated data of the first primary signal, thereby achieving simple demodulation of the primary signal and the symbiotic backscattering communication signal.
- the purpose of the secondary signal is
- this embodiment of the present application also provides a signal processing device 1700, which is applied to backscatter communication equipment, including:
- the first receiving module 1701 is used to receive the first main signal.
- the first main signal includes M modulation blocks.
- Each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N, and N is each The number of resource units included in each of the modulation blocks, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the second modulation module 1702 is used to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
- the device of the embodiment of the present application also includes:
- the second sending module is used to send the modulated secondary signal.
- the M secondary signals include one second reference signal, or two second reference signals with the same length and opposite phases.
- the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1 ⁇ P ⁇ M/2.
- the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal
- the second modulation module is used to modulate M secondary signals according to the modulation block corresponding to the time domain signal of the main signal to obtain modulated secondary signals.
- the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal
- the second modulation module includes:
- the fourth processing submodule is used to perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain the target modulation block;
- the fifth processing submodule is used to modulate the M secondary signals according to the target modulation block to obtain the first signal
- the sixth processing sub-module is used to perform inverse discrete Fourier transform IDFT processing on the primary signal to obtain a modulated secondary signal.
- the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
- the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal.
- the first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
- this embodiment of the present application also provides a signal processing device 1800, which is applied to the receiving end device and includes:
- the first processing module 1801 is used to obtain the first main signal, and perform coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain the first main signal.
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block. Quantity, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the second processing module 1802 is used to obtain the symbiotic backscattering modulation block, perform coherent demodulation processing on the symbiotic backscattering modulation block according to the first main signal, and obtain the data in the secondary signal, and M is a positive integer. .
- the first processing module includes:
- a first demodulation submodule configured to coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate
- the first decoding submodule is configured to perform bit decoding processing on the first main signal estimated value through a channel decoder to obtain data in the first main signal.
- the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
- the second processing module includes:
- the first processing sub-module is used to perform copy processing on the first main signal to obtain the copied main signal;
- the second processing submodule is used to perform weighted average processing on the symbiotic backscattering modulation block through the copied main signal to obtain the processed symbiotic backscattering modulation block;
- the third processing sub-module is used to perform coherent demodulation processing on the processed co-occurring back-scattering modulation block according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain the data in the secondary signal.
- the receiving end device can simply and effectively respond to the first reference signal in the first main signal.
- the first main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the main signal in the symbiotic backscatter communication signal. and sub-signal purposes.
- the signal processing device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip.
- the electronic device may be a terminal or other devices other than the terminal.
- terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.
- NAS Network Attached Storage
- the signal processing device provided by the embodiments of the present application can implement each process implemented by the method embodiments in Figures 5 to 15 and achieve the same technical effect. To avoid duplication, details will not be described here.
- this embodiment of the present application also provides a communication device 1900, which includes a processor 1901 and a memory 1902.
- the memory 1902 stores programs or instructions that can be run on the processor 1901, such as , when the communication device 1900 is a terminal, when the program or instruction is executed by the processor m01, each step of the signal processing method embodiment executed by the above-mentioned sending end device, backscattering communication device or receiving end device is implemented, and the same can be achieved.
- technical effects When the communication device 1900 is a network-side device, when the program or instruction is executed by the processor 1901, each step of the signal processing method embodiment executed by the sending end device, the backscattering communication device or the receiving end device is implemented, and the same can be achieved. The technical effects will not be repeated here to avoid repetition.
- An embodiment of the present application also provides a terminal, including a processor and a communication interface.
- the processor is configured to modulate the main signal in the symbiotic backscattering communication signal to obtain a first main signal; wherein the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- the communication interface is used to receive a first main signal
- the first main signal includes M modulation blocks
- each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
- N is each The number of resource units included in the modulation block
- K is a positive integer
- N ⁇ 2 and M and N are positive integers.
- the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals.
- the processor is configured to acquire the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal.
- the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- FIG. 20 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
- the terminal 2000 includes but is not limited to: radio frequency unit 2001, network module 2002, audio output unit 2003, input unit 2004, sensor 2005, display unit 2006, user input unit 2007, interface unit 2008, memory At least some components in the memory 2009 and the processor 2010 and so on.
- the terminal 2000 may also include a power supply (such as a battery) that supplies power to various components.
- the power supply may be logically connected to the processor 2010 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions.
- the terminal structure shown in Figure 20 does not constitute a limitation on the terminal.
- the terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.
- the input unit 2004 may include a graphics processing unit (Graphics Processing Unit, GPU) 20041 and a microphone 20042.
- the graphics processor 20041 is responsible for the operation of the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras).
- the display unit 2006 may include a display panel 20061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
- the user input unit 2007 includes at least one of a touch panel 20071 and other input devices 20072. Touch panel 20071, also known as touch screen.
- the touch panel 20071 may include two parts: a touch detection device and a touch controller.
- Other input devices 20072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.
- the radio frequency unit 2001 after receiving downlink data from the network side device, can transmit it to the processor 2010 for processing; in addition, the radio frequency unit 2001 can send uplink data to the network side device.
- the radio frequency unit 2001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.
- Memory 2009 may be used to store software programs or instructions as well as various data.
- the memory 2009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc.
- memory 2009 may include volatile memory or nonvolatile memory, or memory 2009 may include both volatile and nonvolatile memory.
- non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory.
- Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM).
- RAM Random Access Memory
- SRAM static random access memory
- DRAM dynamic random access memory
- synchronous dynamic random access memory Synchronous DRAM, SDRAM
- Double data rate synchronous dynamic random access memory Double Data Rate SDRAM, DDRSDRAM
- Enhanced SDRAM, ESDRAM synchronous link dynamic random access memory
- Synch link DRAM synchronous link dynamic random access memory
- SLDRAM direct memory bus random access memory
- the processor 2010 may include one or more processing units; optionally, the processor 2010 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 2010.
- the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal
- the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, and N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers.
- the radio frequency unit 2001 is also used to send the first main signal.
- the processor 2010 is configured to obtain the time domain signal corresponding to the main signal
- K first reference signals are inserted into each modulation block corresponding to the time domain signal to obtain the first main signal.
- the processor 2010 is configured to obtain the frequency domain signal corresponding to the main signal
- K first reference signals are inserted into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
- K reference signals in each modulation block correspond to a reference sequence
- K*M reference signals in the first main signal correspond to a reference sequence
- the radio frequency unit 2001 is also configured to select a first group of transmission configuration information from at least one group of transmission configuration information, each group of transmission configuration information including carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
- the first main signal is sent according to the first set of transmission configuration information.
- the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
- the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
- the transmission configuration information is associated with at least one of the following:
- the processor 2010 is configured to update the at least one set of transmission configuration information according to measurement quantity reporting information or channel change information.
- the processor 2010 is configured to determine at least one of N and K according to L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
- the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
- the radio frequency unit 2001 is configured to receive a first main signal, where the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, And M and N are positive integers;
- the processor 2010 is configured to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
- the radio frequency unit 2001 is configured to send the modulated secondary signal.
- the M secondary signals include one second reference signal, or two second reference signals with the same length and opposite phases.
- the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1 ⁇ P ⁇ M/2.
- the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal
- the processor 2010 is configured to modulate the M secondary signals according to the modulation block corresponding to the time domain signal of the primary signal to obtain a modulated secondary signal.
- the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal
- the processor 2010 is configured to perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain a target modulation block; modulate the M secondary signals according to the target modulation block, Obtain the primary signal; perform inverse discrete Fourier transform (IDFT) processing on the primary signal to obtain the modulated secondary signal.
- DFT discrete Fourier transform
- the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
- the processor 2010 is configured to acquire a first main signal, and perform coherent demodulation and decoding on the first main signal according to a first reference signal in the first main signal, to obtain Data in the first main signal, the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is each modulation block The number of resource units included in the block, K is a positive integer, N ⁇ 2, and M and N are positive integers; obtain the symbiotic backscattering modulation block, and perform the symbiotic backscattering modulation block according to the first main signal.
- Coherent demodulation processing is used to obtain the data in the secondary signal, and M is a positive integer.
- the processor 2010 is further configured to coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate; use a channel decoder to The first main signal estimated value is subjected to bit decoding processing to obtain the data in the first main signal.
- the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
- the processor 2010 is also configured to perform copy processing on the first main signal to obtain a copied main signal; perform weighted average processing on the symbiotic backscatter modulation block through the copied main signal to obtain a processed symbiotic backscatter modulation block. a backscattering modulation block; performing coherent demodulation processing on the processed co-occurring back-scattering modulation block according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain data in the secondary signal.
- the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal.
- main signal phase Dry demodulation and decoding processing can then demodulate the secondary signal based on the data of the demodulated first primary signal, thereby achieving the purpose of simply demodulating the primary signal and secondary signal in the symbiotic backscattering communication signal.
- Embodiments of the present application also provide a network side device, including a processor and a communication interface.
- the processor is used to modulate the main signal in the symbiotic backscattering communication signal to obtain a first main signal; wherein, the first main signal Includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2 , and M and N are positive integers;
- the communication interface is used to receive a first main signal
- the first main signal includes M modulation blocks
- each of the modulation blocks includes K first reference signals, 1 ⁇ K ⁇ N
- N is each The number of resource units included in the modulation block
- K is a positive integer
- N ⁇ 2 and M and N are positive integers.
- the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals.
- the processor is configured to acquire the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal.
- the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1 ⁇ K ⁇ N, N is the number of resource units included in each modulation block, K is a positive integer, N ⁇ 2, and M and N are positive integers;
- This network-side device embodiment corresponds to the above-mentioned method embodiment.
- Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.
- the embodiment of the present application also provides a network side device.
- the network side device 2100 includes: an antenna 211, a radio frequency device 212, a baseband device 213, a processor 214 and a memory 215.
- the antenna 211 is connected to the radio frequency device 212 .
- the radio frequency device 212 receives information through the antenna 211 and sends the received information to the baseband device 213 for processing.
- the baseband device 213 processes the information to be sent and sends it to the radio frequency device 212.
- the radio frequency device 212 processes the received information and then sends it out through the antenna 211.
- the method performed by the transmitting end device or the receiving end device in the above embodiments can be implemented in the baseband device 213, which includes a baseband processor.
- the baseband device 213 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. 21 .
- One of the chips is, for example, a baseband processor, which is connected to the memory 215 through a bus interface to call the memory 215 .
- the program executes the operations of the sending device or the receiving device shown in the above method embodiment.
- the network side device may also include a network interface 216, which is, for example, a common public radio interface (CPRI).
- a network interface 216 which is, for example, a common public radio interface (CPRI).
- CPRI common public radio interface
- the network side device 2100 in the embodiment of the present application also includes: instructions or programs stored in the memory 215 and executable on the processor 214.
- the processor 214 calls the instructions or programs in the memory 215 to execute the instructions shown in Figures 16, 17 or 18 shows the implementation method of each module and achieves the same technical effect. To avoid repetition, it will not be repeated here.
- Embodiments of the present application also provide a readable storage medium.
- Programs or instructions are stored on the readable storage medium.
- the program or instructions are executed by a processor, each process of the above signal processing method embodiment is implemented and the same can be achieved. skills To avoid repetition, we will not go into details here.
- the processor is the processor in the terminal described in the above embodiment.
- the readable storage medium may be non-volatile or non-transient.
- Readable storage media may include computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks or optical disks.
- An embodiment of the present application further provides a chip.
- the chip includes a processor and a communication interface.
- the communication interface is coupled to the processor.
- the processor is used to run programs or instructions to implement the above signal processing method embodiments. Each process can achieve the same technical effect. To avoid duplication, it will not be described again here.
- chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
- Embodiments of the present application further provide a computer program/program product.
- the computer program/program product is stored in a storage medium.
- the computer program/program product is executed by at least one processor to implement the above signal processing method embodiment.
- Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.
- Embodiments of the present application also provide a signal processing system, including: a transmitting end device, a backscattering communication device, and a receiving end device.
- the transmitting end device can be used to perform the signal processing method performed by the transmitting end device as described above.
- the backscatter communication device may be used to perform the steps of the signal processing method performed by the backscatter communication device as described above
- the receiving end device may be used to perform the signal processing method performed by the receiving end device as described above. step,.
- the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation.
- the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to related technologies.
- the computer software product is stored in a storage medium (such as ROM/RAM, disk, CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.
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Abstract
The present application relates to the technical field of communications, and discloses a signal processing method and apparatus, and a communication device. The signal processing method of embodiments of the present application comprises: a transmitting end device modulates a main signal in a symbiotic backscatter communication signal to obtain a first main signal, wherein the first main signal comprises M modulator blocks, each modulator block comprises K first reference signals, K is greater than or equal to 1 and is less than or equal to N, N is the number of resource units comprised in each modulator block, K is a positive integer, N is greater than or equal to 2, and M and N are positive integers.
Description
相关申请的交叉引用Cross-references to related applications
本申请主张在2022年8月17日在中国提交的中国专利申请No.202210991995.7的优先权,其全部内容通过引用包含于此。This application claims priority from Chinese Patent Application No. 202210991995.7 filed in China on August 17, 2022, the entire content of which is incorporated herein by reference.
本申请属于通信技术领域,具体涉及一种信号处理方法、装置及通信设备。The present application belongs to the field of communication technology, and specifically relates to a signal processing method, device and communication equipment.
反向散射(Backscatter)通信是指反向散射通信设备利用其它设备或者环境中的射频信号进行信号调制来传输自己信息。共生反向散射通信信号包括主信号和次信号,其中,主信号由发送端设备发送,反向散射通信设备接收主信号并通过调制产生次信号,最后对次信号进行反向散射。由于解调过程较为复杂,相关技术中主信号和次信号中只有一者承载有数据。本申请考虑并提出一种新的场景,即主信号承载有数据且次信号也承载有数据的场景,在此场景中,接收端设备无法解调出次信号中的数据,且在解调主信号数据时使用最大似然(Maximum-Likelihood,ML)检测算法,线性检测算法和基于连续干扰消除(Successive Interference Cancellation,SIC)的检测算法来对主信号进行解调,其复杂度较高,相关技术中的***难以满足该高复杂度的解调方法,因此本申请提出对应解决此场景下解调共生反向散射通信信号的方法。Backscatter communication means that backscatter communication equipment uses radio frequency signals from other devices or the environment to perform signal modulation to transmit its own information. The symbiotic backscatter communication signal includes a primary signal and a secondary signal, where the primary signal is sent by the transmitting end device, the backscatter communication device receives the primary signal and generates a secondary signal through modulation, and finally backscatters the secondary signal. Since the demodulation process is relatively complex, only one of the primary signal and the secondary signal carries data in the related technology. This application considers and proposes a new scenario, that is, a scenario in which the primary signal carries data and the secondary signal also carries data. In this scenario, the receiving device cannot demodulate the data in the secondary signal, and when demodulating the primary signal The signal data uses the Maximum-Likelihood (ML) detection algorithm, linear detection algorithm and detection algorithm based on Successive Interference Cancellation (SIC) to demodulate the main signal. Its complexity is high and related It is difficult for systems in the art to meet this high-complexity demodulation method. Therefore, this application proposes a method for demodulating symbiotic backscattered communication signals in this scenario.
需要说明的是,上述内容仅仅是为了方便理解本申请的技术方案,并不构成对本申请的相关技术的限定。It should be noted that the above content is only for the convenience of understanding the technical solution of the present application and does not constitute a limitation of the relevant technology of the present application.
发明内容Contents of the invention
本申请实施例提供一种信号处理方法、装置及通信设备,能够解决如何简单地解调共生反向散射通信信号的问题。Embodiments of the present application provide a signal processing method, device and communication equipment, which can solve the problem of how to simply demodulate symbiotic backscattered communication signals.
第一方面,提供了一种信号处理方法,包括:The first aspect provides a signal processing method, including:
发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号;The sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal;
其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
第二方面,提供了一种信号处理方法,包括:The second aspect provides a signal processing method, including:
反向散射通信设备接收第一主信号,所述第一主信号包括M个调制块,每个所述调
制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The backscatter communication device receives a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks The modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers;
所述反向散射通信设备根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。The backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals.
第三方面,提供了一种信号处理方法,包括:In the third aspect, a signal processing method is provided, including:
接收端设备获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The receiving end device acquires the first main signal, and performs coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal, so The first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, and K is a positive Integers, N≥2, and M and N are positive integers;
所述接收端设备获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。The receiving end device acquires the symbiotic backscatter modulation block, performs coherent demodulation processing on the symbiotic backscatter modulation block according to the first primary signal, and obtains data in the secondary signal, and M is a positive integer.
第四方面,提供了一种信号处理装置,应用于发送端设备,包括:In the fourth aspect, a signal processing device is provided, applied to sending end equipment, including:
第一调制模块,用于发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号;The first modulation module is used for the sending end device to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
第五方面,提供了一种信号处理装置,应用于反向散射通信设备,包括:In a fifth aspect, a signal processing device is provided for use in backscatter communication equipment, including:
第一接收模块,用于接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The first receiving module is used to receive the first main signal. The first main signal includes M modulation blocks. Each of the modulation blocks includes K first reference signals, 1≤K≤N, and N is each The number of resource units included in the modulation block, K is a positive integer, N≥2, and M and N are positive integers;
第二调制模块,用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。The second modulation module is used to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
第六方面,提供了一种信号处理装置,应用于接收端设备,包括:In the sixth aspect, a signal processing device is provided, applied to receiving end equipment, including:
第一处理模块,用于获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The first processing module is used to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal. data, the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block. , K is a positive integer, N≥2, and M and N are positive integers;
第二处理模块,用于获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。The second processing module is used to obtain the co-occurring backscattering modulation block, perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal, and obtain data in the secondary signal, and M is a positive integer.
第七方面,提供了一种终端,该终端包括处理器和存储器,所述存储器存储可在所述处理器上运行的程序或指令,所述程序或指令被所述处理器执行时实现如第一方面、第二方面或第三方面所述的方法的步骤。In a seventh aspect, a terminal is provided. The terminal includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in the first aspect, the second aspect or the third aspect.
第八方面,提供了一种终端,包括处理器及通信接口,其中,所述处理器用于对共生反向散射通信信号中的主信号进行调制,得到第一主信号;
In an eighth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers;
或者,通信接口用于接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;处理器用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。Alternatively, the communication interface is used to receive a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks includes K first reference signals, 1≤K≤N, N is each The number of resource units included in the modulation block, K is a positive integer, N≥2, and M and N are positive integers; the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal.
或者,处理器用于接收端设备获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。Alternatively, the processor is configured for the receiving end device to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal. The first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block. Quantity, K is a positive integer, N≥2, and M and N are positive integers; obtain the co-occurring backscattering modulation block, and perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal to obtain The data in the secondary signal, and M is a positive integer.
第九方面,提供了一种网络侧设备,该网络侧设备包括处理器和存储器,所述存储器存储可在所述处理器上运行的程序或指令,所述程序或指令被所述处理器执行时实现如第一方面、第二方面或第三方面所述的方法的步骤。In a ninth aspect, a network side device is provided. The network side device includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are executed by the processor. When implementing the steps of the method described in the first aspect, the second aspect or the third aspect.
第十方面,提供了一种网络侧设备,包括处理器及通信接口,其中,所述处理器用于对共生反向散射通信信号中的主信号进行调制,得到第一主信号;In a tenth aspect, a network side device is provided, including a processor and a communication interface, wherein the processor is used to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;
其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers;
或者,通信接口用于接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;处理器用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。Alternatively, the communication interface is used to receive a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks includes K first reference signals, 1≤K≤N, N is each The number of resource units included in the modulation block, K is a positive integer, N≥2, and M and N are positive integers; the processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal.
或者,处理器用于接收端设备获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。Alternatively, the processor is configured for the receiving end device to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal. The first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block. Quantity, K is a positive integer, N≥2, and M and N are positive integers; obtain the co-occurring backscattering modulation block, and perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal to obtain The data in the secondary signal, and M is a positive integer.
第十一方面,提供了一种信号处理***,包括:发送端设备、反向散射通信设备及接收端设备,所述发送端设备可用于执行如第一方面所述的方法的步骤,所述反向散射通信设备可用于执行如第二方面所述的方法的步骤,所述接收端设备可用于执行如第三方面所述的方法的步骤。
In an eleventh aspect, a signal processing system is provided, including: a transmitting end device, a backscattering communication device, and a receiving end device. The transmitting end device can be used to perform the steps of the method described in the first aspect, wherein The backscatter communication device may be used to perform the steps of the method as described in the second aspect, and the receiving end device may be used to perform the steps of the method as described in the third aspect.
第十二方面,提供了一种可读存储介质,所述可读存储介质上存储程序或指令,所述程序或指令被处理器执行时实现如第一方面所述的方法的步骤,或者实现如第二方面所述的方法的步骤,或者实现如第三方面所述的方法的步骤。In a twelfth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented. The steps of the method as described in the second aspect, or the steps of implementing the method as described in the third aspect.
第十三方面,提供了一种芯片,所述芯片包括处理器和通信接口,所述通信接口和所述处理器耦合,所述处理器用于运行程序或指令,实现如第一方面所述的方法,或实现如第二方面所述的方法,或实现如第三方面所述的方法。In a thirteenth aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. method, or implement the method as described in the second aspect, or implement the method as described in the third aspect.
第十四方面,提供了一种计算机程序/程序产品,所述计算机程序/程序产品被存储在存储介质中,所述计算机程序/程序产品被至少一个处理器执行以实现如第一方面所述的方法,或实现如第二方面所述的方法,或实现如第三方面所述的方法。In a fourteenth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect method, or implement the method described in the second aspect, or implement the method described in the third aspect.
在本申请实施例中,发送端设备在主信号的每个调制块中***K个第一参考信号,得到第一主信号,使得接收端设备根据该第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In this embodiment of the present application, the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal. A primary signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the demodulated data of the first primary signal, thereby achieving simple demodulation of the primary signal and the symbiotic backscattering communication signal. The purpose of the secondary signal.
图1表示本申请实施例可应用的一种通信***的结构图;Figure 1 shows a structural diagram of a communication system applicable to the embodiment of the present application;
图2表示Passive IoT的发送和接收场景;Figure 2 shows the sending and receiving scenarios of Passive IoT;
图3表示Passive IoT相关的共生反向散射中主信号和次信号的示意图;Figure 3 shows a schematic diagram of the primary signal and secondary signal in Passive IoT-related symbiotic backscattering;
图4表示利用波束赋形的Passive IoT共生反向散射示意图;Figure 4 shows a schematic diagram of Passive IoT symbiotic backscattering using beam forming;
图5表示本申请实施例的信号处理方法的流程示意图之一;Figure 5 shows one of the schematic flow diagrams of the signal processing method according to the embodiment of the present application;
图6表示本申请中基于单载波在时域上主信号和次信号的调制示意图;Figure 6 shows a schematic diagram of the modulation of the main signal and the secondary signal in the time domain based on a single carrier in this application;
图7表示本申请中基于OFDM波形在频域上主信号和次信号的调制示意图;Figure 7 shows a schematic diagram of the modulation of the main signal and the secondary signal in the frequency domain based on OFDM waveforms in this application;
图8表示本申请中针对主信号中第一参考信号的设计示意图;Figure 8 shows a schematic diagram of the design of the first reference signal in the main signal in this application;
图9表示本申请中基于单载波在时域上主信号(包括第一参考信号)和次信号的调制示意图;Figure 9 shows a schematic diagram of the modulation of the primary signal (including the first reference signal) and the secondary signal in the time domain based on a single carrier in this application;
图10表示本申请中基于OFDM波形在频域上主信号(包括第一参考信号)的调制示意图;Figure 10 shows the modulation diagram of the main signal (including the first reference signal) in the frequency domain based on the OFDM waveform in this application;
图11表示本申请实施例的信号处理方法的流程示意图之二;Figure 11 shows the second schematic flow chart of the signal processing method according to the embodiment of the present application;
图12表示本申请实施例针对次信号中第二参考信号的设计示意图;Figure 12 shows a schematic design diagram of the second reference signal in the secondary signal according to the embodiment of the present application;
图13表示本申请实施例的信号处理方法的流程示意图之三;Figure 13 shows the third schematic flow chart of the signal processing method according to the embodiment of the present application;
图14表示本申请实施例中针对第一参考信号和第二参考信号的设计示意图;Figure 14 shows a schematic design diagram for the first reference signal and the second reference signal in the embodiment of the present application;
图15表示本申请实施例中接收端设备分层解调的示意图;Figure 15 shows a schematic diagram of layered demodulation of the receiving end device in the embodiment of the present application;
图16表示本申请实施例的信号处理装置的模块示意图之一;Figure 16 shows one of the module schematic diagrams of the signal processing device according to the embodiment of the present application;
图17表示本申请实施例的信号处理装置的模块示意图之二;Figure 17 shows the second module schematic diagram of the signal processing device according to the embodiment of the present application;
图18表示本申请实施例的信号处理装置的模块示意图之三;
Figure 18 shows the third module schematic diagram of the signal processing device according to the embodiment of the present application;
图19表示本申请实施例的通信设备的结构框图;Figure 19 shows a structural block diagram of the communication device according to the embodiment of the present application;
图20表示本申请实施例的终端的结构框图;Figure 20 shows a structural block diagram of a terminal according to an embodiment of the present application;
图21表示本申请实施例的网络侧设备的结构框图。Figure 21 shows a structural block diagram of the network side device according to the embodiment of the present application.
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员所获得的所有其他实施例,都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象,而不用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换,以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施,且“第一”、“第二”所区别的对象通常为一类,并不限定对象的个数,例如第一对象可以是一个,也可以是多个。此外,说明书以及权利要求中“和/或”表示所连接对象的至少其中之一,字符“/”一般表示前后关联对象是一种“或”的关系。The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.
值得指出的是,本申请实施例所描述的技术不限于长期演进型(Long Term Evolution,LTE)/LTE的演进(LTE-Advanced,LTE-A)***,还可用于其他无线通信***,诸如码分多址(Code Division Multiple Access,CDMA)、时分多址(Time Division Multiple Access,TDMA)、频分多址(Frequency Division Multiple Access,FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access,OFDMA)、单载波频分多址(Single-carrier Frequency Division Multiple Access,SC-FDMA)和其他***。本申请实施例中的术语“***”和“网络”常被可互换地使用,所描述的技术既可用于以上提及的***和无线电技术,也可用于其他***和无线电技术。以下描述出于示例目的描述了新空口(New Radio,NR)***,并且在以下大部分描述中使用NR术语,但是这些技术也可应用于NR***应用以外的应用,如第6代(6th Generation,6G)通信***。It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th generation Generation, 6G) communication system.
图1示出本申请实施例可应用的一种无线通信***的框图。无线通信***包括终端11和网络侧设备12。其中,终端11可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)或称为笔记本电脑、个人数字助理(Personal Digital Assistant,PDA)、掌上电脑、上网本、超级移动个人计算机(ultra-mobile personal computer,UMPC)、移动上网装置(Mobile Internet Device,MID)、增强现实(augmented reality,AR)/虚拟现实(virtual reality,VR)设备、机器人、可穿戴式设备(Wearable Device)、车载设备(Vehicle User Equipment,VUE)、行人终端(Pedestrian User Equipment,PUE)、智能家居(具有无线通信功能的家居设备,如冰箱、电视、洗衣机或者家具等)、游戏机、个人计算机(personal computer,PC)、柜员机或者自助机等终端侧设备,可穿戴式设备包括:智能手表、智能手环、智能耳机、智能眼镜、智能首饰(智能手镯、智能手链、智能戒指、智能项链、智能脚镯、智能脚链等)、智能腕带、智能服装等。需要说明的是,在本申请实施例并不限
定终端11的具体类型。网络侧设备12可以包括接入网设备或核心网设备,其中,接入网设备也可以称为无线接入网设备、无线接入网(Radio Access Network,RAN)、无线接入网功能或无线接入网单元。接入网设备可以包括基站、无线局域网(Wireless Local Area Network,WLAN)接入点或无线局域网(Wireless Local Area Network,WiFi)节点等,基站可被称为节点B、演进节点B(Evolved Node B,eNB)、接入点、基收发机站(Base Transceiver Station,BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set,BSS)、扩展服务集(Extended Service Set,ESS)、家用B节点、家用演进型B节点、发送接收点(Transmitting Receiving Point,TRP)或所述领域中其他某个合适的术语,只要达到相同的技术效果,所述基站不限于特定技术词汇,需要说明的是,在本申请实施例中仅以NR***中的基站为例进行介绍,并不限定基站的具体类型。Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , Vehicle User Equipment (VUE), Pedestrian User Equipment (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiments of this application are not limited to Determine the specific type of terminal 11. The network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless access network unit. Access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point or a Wireless Local Area Network (WiFi) node, etc. The base station may be called a Node B or an Evolved Node B (Evolved Node B). , eNB), access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B node, transmitting receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms, and needs to be explained However, in the embodiment of this application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.
为使本领域技术人员能够更好地理解本申请实施例,先进行如下说明。In order to enable those skilled in the art to better understand the embodiments of the present application, the following description is provided first.
1、反向散射(Backscatter)通信***;1. Backscatter communication system;
反向散射通信(即Backscatter通信)是指反向散射通信设备(如标签Tag)利用其它设备或者环境中的射频信号进行信号调制来传输自己信息。反向散射通信设备通过调节其内部阻抗来控制电路的反射系数Γ,从而改变入射信号的幅度、频率、相位等,实现信号的调制。其中信号的反射系数可表征为:
Backscatter communication (i.e. Backscatter communication) means that backscatter communication devices (such as tags) use radio frequency signals from other devices or the environment to perform signal modulation to transmit their own information. Backscatter communication equipment controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation. The reflection coefficient of the signal can be characterized as:
Backscatter communication (i.e. Backscatter communication) means that backscatter communication devices (such as tags) use radio frequency signals from other devices or the environment to perform signal modulation to transmit their own information. Backscatter communication equipment controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation. The reflection coefficient of the signal can be characterized as:
其中,Z0为天线特性阻抗,Z1是负载阻抗。假设入射信号为Sin(t),则输出信号为因此,通过合理的控制反射系数可实现对应的幅度调制、频率调制或相位调制。基于此,反向散射通信设备,可以是传统射频识别(Radio Frequency Identification,RFID)中的Backscatter,或者是无源或半无源(Passive/Semi-passive)物联网(Internet of Things,IoT)。Among them, Z 0 is the antenna characteristic impedance, and Z 1 is the load impedance. Assuming that the incident signal is S in (t), the output signal is Therefore, corresponding amplitude modulation, frequency modulation or phase modulation can be achieved by reasonably controlling the reflection coefficient. Based on this, backscatter communication equipment can be Backscatter in traditional Radio Frequency Identification (RFID), or passive or semi-passive (Passive/Semi-passive) Internet of Things (IoT).
在反向散射通信***中,有两个主要的链路预算,即前向链路和反向散射链路预算,它们会影响反向散射通信***性能。特别地,前向链路预算被定义为反向散射发射机接收的功率量,反向散射链路预算是反向散射接收机接收的功率量。In a backscatter communication system, there are two main link budgets, namely the forward link and the backscatter link budget, which affect the backscatter communication system performance. In particular, the forward link budget is defined as the amount of power received by the backscatter transmitter, and the backscatter link budget is the amount of power received by the backscatter receiver.
反向散射通信***可被分为三种主要类型:单基地反向散射通信***(Monostatic Backscatter Communication System,MBCS),双基地反向散射通信***(Bistatic Backscatter Communication System,BBCS)和周围反向散射通信***(Ambient Backscatter Communication System,ABCS)。Backscatter communication systems can be divided into three main types: Monostatic Backscatter Communication System (MBCS), Bistatic Backscatter Communication System (BBCS) and ambient backscatter Communication system (Ambient Backscatter Communication System, ABCS).
2、共生反向散射通信传输方法;2. Symbiotic backscattering communication transmission method;
根据共生反向散射(Symbiotic Backscatter)原理,被动物联网(Passive IoT)信号传输场景一般考虑的是双基地反向散射通信。如果考虑传统蜂窝网络中的典型节点(NR Node B,gNB)和用户设备(User Equipment,UE),并将无源物联网设备(即,Tag)引入蜂窝网络后,可以主要考虑以下两种场景,即,UE辅助被动物联网场景。According to the principle of Symbiotic Backscatter, bistatic backscatter communication is generally considered in Passive IoT signal transmission scenarios. If you consider the typical nodes (NR Node B, gNB) and user equipment (User Equipment, UE) in traditional cellular networks, and introduce passive IoT devices (i.e., Tags) into the cellular network, you can mainly consider the following two scenarios , that is, UE-assisted passive IoT scenario.
场景-1:gNB发送主信号(Primary Signal),x[n],UE接收到主信号的同时,还接收
到Tag反射信号。Tag反射信号是由Tag接收的主信号和自身发送的次信号(Secondary Signal)B[m]调制而成。Scenario-1: gNB sends the primary signal (Primary Signal), x[n]. While receiving the primary signal, the UE also receives Reflect signal to Tag. The Tag reflection signal is modulated by the main signal received by the Tag and the secondary signal (Secondary Signal) B[m] sent by itself.
场景-2是,UE发送主信号,x[n],gNB接收到主信号的同时,还接收到Tag反射信号。Tag反射信号是由Tag接收的主信号和自身发送的次信号B[m]调制而成。Scenario-2 is that the UE sends the main signal, x[n], and the gNB receives the main signal and the Tag reflection signal at the same time. The Tag reflection signal is modulated by the main signal received by the Tag and the secondary signal B[m] sent by itself.
如图2所示,发送端Tx可以是gNB或UE,而接收端Rx可以是相应的UE或gNB。在以下说明中,Tx被统一为gNB,而Rx被统一为UE为例进行说明。当gNB发送主信号x[n]的时候,UE接收端接收到的信号y[n]可以被表示为:
y[n]=(h2+h3B[m])x[n]+w[n];As shown in Figure 2, the transmitting end Tx can be a gNB or a UE, and the receiving end Rx can be a corresponding UE or gNB. In the following description, Tx is unified as gNB, and Rx is unified as UE for explanation. When gNB sends the main signal x[n], the signal y[n] received by the UE receiving end can be expressed as:
y[n]=(h 2 +h 3 B[m])x[n]+w[n];
y[n]=(h2+h3B[m])x[n]+w[n];As shown in Figure 2, the transmitting end Tx can be a gNB or a UE, and the receiving end Rx can be a corresponding UE or gNB. In the following description, Tx is unified as gNB, and Rx is unified as UE for explanation. When gNB sends the main signal x[n], the signal y[n] received by the UE receiving end can be expressed as:
y[n]=(h 2 +h 3 B[m])x[n]+w[n];
其中,h2是gNB到UE的信道响应,h3是gNB通过Tag反射到UE的信道响应,w[n]是加性高斯白(Additive White Gaussian Noise,AWGN)噪声,n=0,1,...,NM-1;m=0,1,...,M-1,和M是次信号的符号数,而N是针对每个被调制次信号中的主信号数,如图3所示。Among them, h 2 is the channel response from gNB to UE, h 3 is the channel response from gNB reflected to UE through Tag, w[n] is Additive White Gaussian Noise (AWGN) noise, n=0,1, ..., NM-1; m=0,1,...,M-1, and M is the number of symbols of the secondary signal, and N is the number of primary signals for each modulated secondary signal, as shown in Figure 3.
其中,主信号x[n]可以通过CDMA,TDMA,正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)等任何波形传输。Among them, the main signal x[n] can be transmitted through any waveform such as CDMA, TDMA, Orthogonal Frequency Division Multiplexing (OFDM), etc.
UE接收端需要检测主信号x[n]和次信号B[m]。UE接收端一般使用相干接收算法,可以由以下几种,即,最大似然(Maximum-Likelihood,ML)检测算法,线性检测算法(Linear Detector)和基于连续干扰消除(Successive Interference Cancellation,SIC)的检测算法。使用这些算法可以完成联合检测主信号x[n]和次信号B[m],但是这些算法具有复杂度高或***性能低下的问题。The UE receiving end needs to detect the primary signal x[n] and the secondary signal B[m]. The UE receiving end generally uses coherent reception algorithms, which can be divided into the following types, namely, Maximum-Likelihood (ML) detection algorithm, Linear Detector (Linear Detector) and Successive Interference Cancellation (SIC)-based detection algorithm. The joint detection of the primary signal x[n] and the secondary signal B[m] can be accomplished using these algorithms, but these algorithms have problems of high complexity or low system performance.
3、利用波束赋形的Passive IoT信号传输方法;3. Passive IoT signal transmission method using beam forming;
如果gNB知道Tag的方向或位置,gNB可以利用波束赋形的方法来实现Passive IoT信号传输,如图4所示,利用波束赋形后的UE接收端接收到的信号,y[n],可以被近似为
y[n]≈h3B[m]x[n]+w[n];If gNB knows the direction or location of Tag, gNB can use the beamforming method to realize Passive IoT signal transmission, as shown in Figure 4. Using the signal received by the UE receiving end after beamforming, y[n], can is approximated as
y[n]≈h 3 B[m]x[n]+w[n];
y[n]≈h3B[m]x[n]+w[n];If gNB knows the direction or location of Tag, gNB can use the beamforming method to realize Passive IoT signal transmission, as shown in Figure 4. Using the signal received by the UE receiving end after beamforming, y[n], can is approximated as
y[n]≈h 3 B[m]x[n]+w[n];
可以看到,利用波束赋形来实现Passive IoT信号传输的好处是增加Tag通信范围并有效提高能量收集。但是为了实现波束赋形需要对Tag进行定位,这样会增加发送端的复杂度。一般这种方法是针对QoS要求较高的Passive IoT业务使用的。It can be seen that the benefit of using beamforming to achieve Passive IoT signal transmission is to increase the Tag communication range and effectively improve energy collection. However, in order to achieve beamforming, the Tag needs to be positioned, which increases the complexity of the transmitter. Generally, this method is used for Passive IoT services with higher QoS requirements.
需要说明的是,本申请实施例的信号处理方法可应用于上述场景-1和场景-2,为了阐述简单,以下以场景-1为例进行说明,而针对场景-2的具体说明不再赘述。而且本申请主要是针对集中式的共生反向散射通信进行说明的,但是本申请中的技术可以被扩展到其他场景,如分离式共生反向散射通信。It should be noted that the signal processing method in the embodiment of the present application can be applied to the above-mentioned Scenario-1 and Scenario-2. For simplicity of explanation, Scenario-1 will be used as an example for description below, and the specific description of Scenario-2 will not be repeated. . Moreover, this application mainly describes centralized symbiotic backscatter communication, but the technology in this application can be extended to other scenarios, such as separated symbiotic backscatter communication.
下面结合附图,通过一些实施例及其应用场景对本申请实施例提供的信号处理方法进行详细地说明。The signal processing method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.
如图5所示,本申请实施例提供了一种信号处理方法,包括:As shown in Figure 5, this embodiment of the present application provides a signal processing method, including:
步骤501:发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信
号;Step 501: The sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal. Number;
其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
可选地,每个第一参考信号对应所述调制块中的一个资源单元。Optionally, each first reference signal corresponds to a resource unit in the modulation block.
上述每个调制块对应一个次信号,通过上述M个调制块可以对M个次信号进行调制。Each of the above modulation blocks corresponds to a secondary signal, and M secondary signals can be modulated through the above M modulation blocks.
上述发送端设备可以是基站也可以是终端。The above-mentioned sending end device may be a base station or a terminal.
可选地,上述第一参考信号用于恢复次信号造成的相位翻转,可选地,所述第一参考信号还用于预测信道的振幅和相位信息。Optionally, the first reference signal is used to recover the phase flip caused by the secondary signal. Optionally, the first reference signal is also used to predict the amplitude and phase information of the channel.
本申请实施例中,发送端设备在主信号的每个调制块中***K个第一参考信号,得到第一主信号,使得接收端设备根据该第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In this embodiment of the present application, the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal. The main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal. The purpose of the signal.
可选地,所述方法还包括:Optionally, the method also includes:
所述发送端设备发送所述第一主信号。The sending end device sends the first main signal.
本申请实施例中,共生反向散射通信信号包括主信号和次信号,主信号x[n]是通过单载波或多载波传输波形承载基于正交幅度调制(Quadrature Amplitude Modulation,QAM)的调制符号,而次信号B[m]是通过单载波或多载波传输波形承载基于二进制相移键控(Binary Phase Shift Keying,BPSK)的调制符号。In the embodiment of this application, the symbiotic backscatter communication signal includes a primary signal and a secondary signal. The primary signal x[n] carries modulation symbols based on Quadrature Amplitude Modulation (QAM) through a single carrier or multi-carrier transmission waveform. , and the secondary signal B[m] carries modulation symbols based on Binary Phase Shift Keying (BPSK) through a single carrier or multi-carrier transmission waveform.
需要说明的是,次信号也可以承载基于QAM的调制符号,但是考虑到Passive IoT应用中Tag(或,反向散射装置(Backscatter Device))允许的复杂度限制,本申请中主要是以BPSK调制方法来进行。但是,本申请中可以针对所有的调制方法,如二进制振幅键控(On-Off Keying,OOK),QAM,差分幅度键控(Differential Amplitude Shift Keying,DASK),差分相移键控(Differential Phase Shift Keying,DPSK),差分幅度相移键控(Differential Amplitude and Phase-Shift Keying,DAPSK)等。It should be noted that the secondary signal can also carry QAM-based modulation symbols, but considering the complexity limit allowed by Tag (or Backscatter Device) in Passive IoT applications, BPSK modulation is mainly used in this application. method to proceed. However, this application can target all modulation methods, such as binary amplitude keying (OOK), QAM, differential amplitude keying (Differential Amplitude Shift Keying, DASK), differential phase shift keying (Differential Phase Shift) Keying (DPSK), Differential Amplitude and Phase-Shift Keying (DAPSK), etc.
本申请实施例中,上述调制块可以是主信号的时域信号对应的调制块,也可以是主信号的频域信号对应的调制块。图6所示的是基于单载波在时域的主信号和次信号的调制示意图。具体地,主信号x[n]是由长度为N的调制块(Modulation Block)组成,每个调制块是由最小通信传输时域资源单元(也可描述为资源元)组成,如,单载波的脉冲(Pulse)。即每个调制块包括N个资源单元。主信号x[n]是从发送端设备(这里以基站为例进行说明)发送,由Tag接收,并通过BPSK调制并产生次信号波形,最后进行反向散射。In the embodiment of the present application, the above-mentioned modulation block may be a modulation block corresponding to the time domain signal of the main signal, or may be a modulation block corresponding to the frequency domain signal of the main signal. Figure 6 shows a schematic diagram of the modulation of the primary signal and secondary signal in the time domain based on a single carrier. Specifically, the main signal x[n] is composed of a modulation block of length N. Each modulation block is composed of a minimum communication transmission time domain resource unit (can also be described as a resource element), such as a single carrier Pulse. That is, each modulation block includes N resource units. The main signal x[n] is sent from the transmitting end device (here, the base station is taken as an example), is received by the Tag, and modulated by BPSK to generate a secondary signal waveform, and finally backscattered.
可选地,调制块N的大小可以由gNB通过L1信令或媒体接入控制控制单元(MAC Control Element,MAC CE)信令通知UE,也可以通过无线资源控制(Radio Resource Control,RRC)进行配置。Optionally, the size of the modulation block N can be notified to the UE by the gNB through L1 signaling or Media Access Control Element (MAC Control Element, MAC CE) signaling, or it can be carried out through Radio Resource Control (Radio Resource Control, RRC) configuration.
具体地,次信号B[m]是调制在从gNB发送,并由Tag接收的接收信号h1x(t)上的,其
中,h1是gNB到Tag间的信道响应(Channel Response)。也就是说,接收信号h1x(t)是作为一种通信传播载体传输次信号B[m]。因此,次信号的单载波反向散射信号可以被表示为:
Specifically, the secondary signal B[m] is modulated on the received signal h 1 x(t) sent from gNB and received by Tag, where , h 1 is the channel response (Channel Response) from gNB to Tag. In other words, the received signal h 1 x(t) is used as a communication propagation carrier to transmit the secondary signal B[m]. Therefore, the single-carrier backscattered signal of the secondary signal can be expressed as:
Specifically, the secondary signal B[m] is modulated on the received signal h 1 x(t) sent from gNB and received by Tag, where , h 1 is the channel response (Channel Response) from gNB to Tag. In other words, the received signal h 1 x(t) is used as a communication propagation carrier to transmit the secondary signal B[m]. Therefore, the single-carrier backscattered signal of the secondary signal can be expressed as:
其中,pT(t)是反向散射信号的脉冲波形,x(t)的信号波形可以是单载波信号波形,也可以是多载波信号波形(如,OFDM波形)。Among them, p T (t) is the pulse waveform of the backscattered signal, and the signal waveform of x (t) can be a single carrier signal waveform or a multi-carrier signal waveform (such as OFDM waveform).
进一步地,Tag可以使用多载波波形(如,OFDM波形)对次信号B[m]进行BPSK调制并反向散射。使用OFDM波形对次信号B[m]进行BPSK调制并反向散射的好处是可以有效对抗多径衰落效应,从而提高UE对反向散射信号的接收性能。Further, Tag can use a multi-carrier waveform (eg, OFDM waveform) to perform BPSK modulation and backscatter on the secondary signal B[m]. The advantage of using the OFDM waveform to perform BPSK modulation and backscattering on the secondary signal B[m] is that it can effectively combat the multipath fading effect, thereby improving the UE's reception performance of the backscattered signal.
图7所示的是基于OFDM载波在频域的主信号和次信号的调制示意图。具体地,接收到的主信号是具有OFDM波形的时域信号。Tag接收到OFDM时域信号h1x(t),并把时域信号转换成频域信号。把时域信号转换成频域信号的方法有两种。一种是通过傅里叶变换(Fourier Transform,FT)直接把时域模拟信号转换成频域信号。另一种是先把时域模拟信号转换成时域数字信号,然后通过离散傅里叶变换(Discrete Fourier Transform,DFT)把时域数字信号转换成频域信号。两者的区别是不同的实现方法,而最后得到的频域信号没有区别。在此被转换后的接收频域信号被表示为:
Figure 7 shows the modulation diagram of the main signal and the secondary signal in the frequency domain based on the OFDM carrier. Specifically, the received main signal is a time domain signal with an OFDM waveform. Tag receives the OFDM time domain signal h 1 x(t) and converts the time domain signal into a frequency domain signal. There are two methods of converting time domain signals into frequency domain signals. One is to directly convert time domain analog signals into frequency domain signals through Fourier Transform (FT). The other is to first convert the time domain analog signal into a time domain digital signal, and then convert the time domain digital signal into a frequency domain signal through Discrete Fourier Transform (DFT). The difference between the two is different implementation methods, and there is no difference in the final frequency domain signal. The converted received frequency domain signal is expressed as:
Figure 7 shows the modulation diagram of the main signal and the secondary signal in the frequency domain based on the OFDM carrier. Specifically, the received main signal is a time domain signal with an OFDM waveform. Tag receives the OFDM time domain signal h 1 x(t) and converts the time domain signal into a frequency domain signal. There are two methods of converting time domain signals into frequency domain signals. One is to directly convert time domain analog signals into frequency domain signals through Fourier Transform (FT). The other is to first convert the time domain analog signal into a time domain digital signal, and then convert the time domain digital signal into a frequency domain signal through Discrete Fourier Transform (DFT). The difference between the two is different implementation methods, and there is no difference in the final frequency domain signal. The converted received frequency domain signal is expressed as:
其中,是长度为Q的DFT函数,q=0,1,...,Q-1,而Q是OFDM符号长度,Q=MN。in, is the DFT function of length Q, q=0,1,...,Q-1, and Q is the OFDM symbol length, Q=MN.
具体地,频域主信号X[q]被长度为N的调制块(Modulation Block)分割,每个调制块是由最小通信传输频域资源元组成,如OFDM子载波(OFDM Carrier)。Tag在频域主信号X[q]上进行BPSK调制并产生次信号频域信号波形,可以被表示为:
Specifically, the frequency domain main signal X[q] is divided by modulation blocks of length N. Each modulation block is composed of minimum communication transmission frequency domain resource elements, such as OFDM subcarriers (OFDM Carrier). Tag performs BPSK modulation on the main frequency domain signal X[q] and generates a secondary signal frequency domain signal waveform, which can be expressed as:
Specifically, the frequency domain main signal X[q] is divided by modulation blocks of length N. Each modulation block is composed of minimum communication transmission frequency domain resource elements, such as OFDM subcarriers (OFDM Carrier). Tag performs BPSK modulation on the main frequency domain signal X[q] and generates a secondary signal frequency domain signal waveform, which can be expressed as:
其中,PT[q]是反向散射信号在频域上的波形。Among them, P T [q] is the waveform of the backscattered signal in the frequency domain.
然后,Tag通过IDFT运算将频域信号XB[q]转换成时域信号xB[t],被表示为:
Then, Tag converts the frequency domain signal X B [q] into a time domain signal x B [t] through the IDFT operation, which is expressed as:
Then, Tag converts the frequency domain signal X B [q] into a time domain signal x B [t] through the IDFT operation, which is expressed as:
其中,是长度为Q的IDFT函数,q=0,1,...,Q-1,而Q是OFDM符号长度,Q=MN。in, is the IDFT function of length Q, q=0,1,...,Q-1, and Q is the OFDM symbol length, Q=MN.
最后,OFDM时域信号xB(t)被Tag反向散射到UE。Finally, the OFDM time domain signal x B (t) is backscattered by the Tag to the UE.
虽然UE对主信号的解调可以通过背景技术中阐述的相干接收算法解决,如,ML检测算法,线性检测算法和基于SIC的检测算法,但是其复杂度很难在相关技术的***中得到满足。因此比较妥善的方法是通过一定程度的参考信号标准化设计,从而有效并简便地解决共生反向散射通信的数据解调问题。Although the demodulation of the main signal by the UE can be solved by the coherent reception algorithm described in the background art, such as ML detection algorithm, linear detection algorithm and SIC-based detection algorithm, its complexity is difficult to be satisfied in the system of related technologies. . Therefore, a more appropriate method is to effectively and simply solve the data demodulation problem of symbiotic backscatter communication through a certain degree of reference signal standardization design.
作为第一种可选地实现方式,所述发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号,包括:As a first optional implementation manner, the sending end device modulates the main signal in the symbiotic backscatter communication signal to obtain the first main signal, including:
获取所述主信号对应的时域信号;Obtain the time domain signal corresponding to the main signal;
将所述时域信号划分为一个或多个调制块;
dividing the time domain signal into one or more modulation blocks;
在所述时域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。K first reference signals are inserted into each modulation block corresponding to the time domain signal to obtain the first main signal.
作为第二种可选地实现方式,所述发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号,包括:As a second optional implementation manner, the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal, including:
获取所述主信号对应的频域信号;Obtain the frequency domain signal corresponding to the main signal;
将所述频域信号划分为一个或多个调制块;Divide the frequency domain signal into one or more modulation blocks;
在所述频域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。K first reference signals are inserted into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
可选地,上述第一种可选地实现方式和第二种可选地实现方式中,每个所述调制块中的K个参考信号对应一个参考序列,或者,所述第一主信号中的K*M个参考信号对应一个参考序列。Optionally, in the above first optional implementation manner and the second optional implementation manner, the K reference signals in each modulation block correspond to one reference sequence, or the K reference signals in the first main signal K*M reference signals correspond to a reference sequence.
例如,每个调制块中包括2个参考信号,则两个参考信号对应的参考序列为1、-1或为-1、1等。又例如,每个调制块包括2个参考信号,M为3,则K*M个参考信号对应参考序列可以为1、-1、1、-1、1、-1。For example, if each modulation block includes two reference signals, the reference sequences corresponding to the two reference signals are 1, -1 or -1, 1, etc. For another example, each modulation block includes 2 reference signals, and M is 3, then the reference sequences corresponding to K*M reference signals may be 1, -1, 1, -1, 1, -1.
可选地,所述K个第一参考信号位于所述调制块的前N个资源单元中,且每个所述第一参考信号对应一个资源单元。Optionally, the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
这里,将K个第一参考信号放置在每个调制块的最前面,便于接收端设备能够首先获取每个调制块中的第一参考信号,然后基于该第一参考信号对调制块中后面的数据进行解调。当然,K个第一参考信号也可以放置于每个调直块的任意位置,如最后的位置,或中间的一个或多个位置等等,位置的选择可以根据具体需求实现,本申请对此不作具体限定。Here, the K first reference signals are placed at the front of each modulation block, so that the receiving end device can first obtain the first reference signal in each modulation block, and then use the first reference signal to analyze the subsequent ones in the modulation block. The data is demodulated. Of course, the K first reference signals can also be placed at any position of each straightening block, such as the last position, or one or more positions in the middle, etc. The selection of positions can be realized according to specific needs. This application will No specific limitation is made.
另外,在K大于2的情况下,K个第一参考信号的位置可以连续也可以不连续。In addition, when K is greater than 2, the positions of the K first reference signals may be continuous or discontinuous.
可选地,本申请实施例的方法,还包括:Optionally, the method in the embodiment of this application also includes:
根据L1信令、媒体接入控制单元MAC CE信令或无线资源控制RRC配置信息,确定N和K中的至少一项。At least one of N and K is determined according to L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
首先在此针对上述两种可选地实现方式中,主信号相关参考信号的设计进行说明。主信号相关参考信号是用于恢复次信号造成的相位翻转,同时预测信道的振幅和相位信息。由于次信号是承载在接收的主信号上的,并通过长度为N的时域或频域调制块进行调制,因此每个调制块至少需要分配一个资源元(如,单载波的脉冲)作为参考信号,即,1≤K≤N,其中,K是每个调制块分配的参考信号资源元数。如次信号通过时域信号承载并反向散射的话,那么每一个长度为N的时域调制块需要至少分配一个资源元作为参考信号,即,1≤K≤N。同样地,如果次信号通过频域信号承载并反向散射的话,那么每一个长度为N的频域调制块需要至少分配一个资源元(如,OFDM子载波)作为参考信号,即,1≤K≤N。First, the design of the reference signal related to the main signal in the above two optional implementation methods will be described. The reference signal related to the primary signal is used to recover the phase flip caused by the secondary signal and predict the amplitude and phase information of the channel at the same time. Since the secondary signal is carried on the received primary signal and modulated by a time domain or frequency domain modulation block of length N, each modulation block needs to be allocated at least one resource element (e.g., a pulse of a single carrier) as a reference signal, that is, 1≤K≤N, where K is the number of reference signal resource elements allocated to each modulation block. If the secondary signal is carried and backscattered by a time domain signal, then each time domain modulation block of length N needs to be allocated at least one resource element as a reference signal, that is, 1 ≤ K ≤ N. Similarly, if the secondary signal is carried and backscattered by a frequency domain signal, then each frequency domain modulation block of length N needs to be allocated at least one resource element (such as OFDM subcarrier) as a reference signal, that is, 1≤K ≤N.
特殊地,当每一个长度为N的频域调制块配备N个资源元,即,K=N的时候,主信号将不传输数据信号,而是完全作为载波信号承载次信号传输。Specifically, when each frequency domain modulation block of length N is equipped with N resource elements, that is, when K=N, the main signal will not transmit a data signal, but will completely serve as a carrier signal to carry secondary signal transmission.
值得注意的是,调制块N的大小和每个调制块中参考信号的资源元数K可以通过L1信令或MAC CE信令进行通知,也可以通过RRC进行配置。另外,每个调制块中参考信号
可以配置参考序列,而参考序列配置可以通过RRC进行。It is worth noting that the size of the modulation block N and the number of resource elements K of the reference signal in each modulation block can be notified through L1 signaling or MAC CE signaling, or configured through RRC. In addition, the reference signal in each modulation block The reference sequence can be configured, and the reference sequence configuration can be performed through RRC.
图8所示的是针对主信号的参考信号示例,其中设置场景(a)调制块N=4,每个调制块N中分配一个资源元,即,K=1,(b)调制块N=4,每个调制块N中分配一个资源元,即,K=2。Figure 8 shows an example of a reference signal for the main signal, in which the scenario is set (a) modulation block N=4, and one resource element is allocated to each modulation block N, that is, K=1, (b) modulation block N= 4. One resource element is allocated to each modulation block N, that is, K=2.
需要说明的是,由于次信号是通过BPSK调制的,在信道估计中,每调制块单位的BPSK相位翻转因素必须被考虑。因此UE在信道估计时需要以调制块为单位进行,而调制块之间无法进行信道协同估计。信道估计的执行可以简单地基于LS的信道估计,整体信道包括gNB-Tag-UE信道和BPSK调制相位翻转。由于无法进行调制块信道协同估计,与最小均方误差(Minimum Mean Square Error,MMSE)信道协同估计相比,最小二乘(Least Square,LS)的信道估计的信噪比(Signal to Noise Ratio,SNR)劣化约为4dB。It should be noted that since the secondary signal is modulated by BPSK, the BPSK phase inversion factor of each modulation block unit must be considered in channel estimation. Therefore, the UE needs to perform channel estimation in units of modulation blocks, and channel cooperative estimation cannot be performed between modulation blocks. The execution of channel estimation can be simply based on the channel estimation of LS, and the overall channel includes gNB-Tag-UE channel and BPSK modulation phase inversion. Since the modulation block channel collaborative estimation cannot be performed, compared with the minimum mean square error (MMSE) channel collaborative estimation, the signal-to-noise ratio (Signal to Noise Ratio) of the least squares (Least Square, LS) channel estimation, SNR) degradation is about 4dB.
在共生反向散射通信中,次信号是通过接收到的主信号来调制的,***参考信号后的主信号从gNB发送,由Tag接收,进行BPSK调制并产生次信号波形,最后反向散射。因此,共生反向散射通信所使用的波形是属于单载波信号波形。In symbiotic backscatter communication, the secondary signal is modulated by the received primary signal. The primary signal after inserting the reference signal is sent from the gNB, received by the Tag, BPSK modulated and generates the secondary signal waveform, and finally backscattered. Therefore, the waveform used in symbiotic backscatter communication is a single-carrier signal waveform.
需要说明的是,对共生反向散射单载波信号,主信号的载波信号波形可以是单载波时域信号,也可以是多载波时域信号。It should be noted that for the symbiotic backscattering single carrier signal, the carrier signal waveform of the main signal can be a single carrier time domain signal or a multi-carrier time domain signal.
图9所示的是基于单载波信号波形在时域主信号(包括第一参考信号)与次信号的调制过程,即图9所示的方案与上述第一种可选地实现方式对应。其中,主信号调制块N=4,而每一个主信号调制块被***一个资源元作为参考信号,即,K=1。具体地,gNB在时域主信号(主信号对应的时域信号)上***第一参考信号,即每三个主信号资源元***一个第一参考信号资源元(即,K=1),从而形成一个长度N=4的时域调制块。Figure 9 shows the modulation process of the main signal (including the first reference signal) and the secondary signal in the time domain based on the single carrier signal waveform. That is, the solution shown in Figure 9 corresponds to the first optional implementation method mentioned above. Among them, the main signal modulation block N=4, and each main signal modulation block is inserted into a resource element as a reference signal, that is, K=1. Specifically, gNB inserts the first reference signal into the time domain main signal (the time domain signal corresponding to the main signal), that is, inserts one first reference signal resource element for every three main signal resource elements (that is, K=1), so that A time domain modulation block of length N=4 is formed.
更具体地,gNB发送主信号x[n],由Tag接收,并对次信号数据符号进行BPSK调制并产生次信号单载波信号波形,最后反向散射。More specifically, gNB sends the primary signal x[n], which is received by Tag, and performs BPSK modulation on the secondary signal data symbols and generates the secondary signal single carrier signal waveform, and finally backscatters.
值得注意的是,针对共生反向散射单载波信号,Tag不需要进行离散傅里叶变换(Discrete Fourier Transform,DFT)和离散傅里叶逆变换(Inverse Discrete Fourier Transform,IDFT)处理,Tag的信号调制是在接收的主信号上直接进行时域处理,因此Tag的复杂度相对比较低。这种共生反向散射方法可以被视为即时共生反向散射***。It is worth noting that for co-occurring backscattered single carrier signals, Tag does not need to be processed by Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT). Modulation performs time domain processing directly on the received main signal, so the complexity of Tag is relatively low. This symbiotic backscattering method can be viewed as an instant symbiotic backscattering system.
在gNB利用全向天线发送主信号的情况下,UE接收端接收到的共生反向散射多载波信号y(t)被表示为:
When the gNB uses an omnidirectional antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is expressed as:
When the gNB uses an omnidirectional antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is expressed as:
其中,是次信号的单载波反向散射信号在公式1定义,h2是gNB到UE间的信道响应,h3是Tag到UE间的信道响应,w[n]是AWGN噪声。in, The single-carrier backscatter signal of the sub-signal is defined in Formula 1, h 2 is the channel response from gNB to UE, h 3 is the channel response from Tag to UE, and w[n] is the AWGN noise.
在gNB利用波束赋形天线发送主信号的情况下,UE接收端接收到的共生反向散射多载波信号y(t)被近似为:
In the case where the gNB uses a beamforming antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as:
In the case where the gNB uses a beamforming antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as:
图10所示的是基于多载波信号波形在频域主信号(包括第一参考信号)与次信号的
调制过程。该图10所示的方案对应上述第二种可选地实现方式,其中,主信号调制块N=4,而每一个主信号调制块被***一个资源元作为参考信号。具体地,gNB在频域主信号上***参考信号,即每三个主信号资源元***一个参考信号资源元(即,K=1),从而形成一个长度N=4的频域调制块。Figure 10 shows the main signal (including the first reference signal) and the secondary signal in the frequency domain based on the multi-carrier signal waveform. modulation process. The solution shown in Figure 10 corresponds to the above-mentioned second optional implementation manner, in which the main signal modulation blocks N=4, and each main signal modulation block is inserted into a resource element as a reference signal. Specifically, the gNB inserts a reference signal into the frequency domain main signal, that is, inserts one reference signal resource element for every three main signal resource elements (ie, K=1), thereby forming a frequency domain modulation block with a length of N=4.
具体地,gNB发送主信号x[n],由Tag接收。Tag首先对接收信号h1x(t)进行DFT运算,使得时域信号转换成频域信号X[q]。然后对次信号数据符号进行频域上的BPSK调制并产生次信号多载波信号波形,并进行IDFT运算,最后反向散射。Specifically, gNB sends the main signal x[n], which is received by Tag. Tag first performs a DFT operation on the received signal h 1 x(t), so that the time domain signal is converted into a frequency domain signal X[q]. Then the secondary signal data symbols are subjected to BPSK modulation in the frequency domain and the secondary signal multi-carrier signal waveform is generated, and the IDFT operation is performed, and finally backscattered.
值得注意的是,Tag对次信号数据符号进行多载波信号波形调制主要是对抗多径衰落效应。针对共生反向散射多载波信号(如,OFDM信号),Tag需要进行DFT和IDFT处理,因此Tag的复杂度相对比较高。另外,由于DFT和IDFT的处理时间延迟至少是一个OFDM符号长度,因此这种共生反向散射方法可以被视为非即时共生反向散射***。It is worth noting that Tag modulates the multi-carrier signal waveform of secondary signal data symbols mainly to combat the multipath fading effect. For symbiotic backscattered multi-carrier signals (such as OFDM signals), Tags need to be processed by DFT and IDFT, so the complexity of Tags is relatively high. In addition, since the processing time delay of DFT and IDFT is at least one OFDM symbol length, this symbiotic backscattering method can be regarded as a non-instantaneous symbiotic backscattering system.
在gNB利用全向天线发送主信号的情况下,UE接收端接收到的共生反向散射多载波信号y(t)被表示为:
y(t)=h2x(t-TProc)+h3xB(t)+w(t); 公式7When the gNB uses an omnidirectional antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is expressed as:
y(t)=h 2 x(tT Proc )+h 3 x B (t)+w(t); Formula 7
y(t)=h2x(t-TProc)+h3xB(t)+w(t); 公式7When the gNB uses an omnidirectional antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is expressed as:
y(t)=h 2 x(tT Proc )+h 3 x B (t)+w(t); Formula 7
其中,xB(t)是次信号的单载波反向散射信号在公式4定义,w[n]是AWGN噪声,TProc是Tag接收端对接收信号的DFT和IDFT的总处理时间。Among them, x B (t) is the single-carrier backscatter signal of the secondary signal defined in Equation 4, w[n] is the AWGN noise, and T Proc is the total processing time of the DFT and IDFT of the received signal at the Tag receiving end.
在gNB利用波束赋形天线发送主信号的情况下,UE接收端接收到的共生反向散射多载波信号y(t)被近似为:
y(t)≈h3xB(t)+w(t); 公式8In the case where the gNB uses a beamforming antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as:
y(t)≈h 3 x B (t)+w(t); Formula 8
y(t)≈h3xB(t)+w(t); 公式8In the case where the gNB uses a beamforming antenna to transmit the main signal, the symbiotic backscattered multi-carrier signal y(t) received by the UE receiving end is approximated as:
y(t)≈h 3 x B (t)+w(t); Formula 8
针对UE接收端解调x[n]和B[m]的说明,本申请中简单地假设信道是单径信道,gNB利用全向天线发送主信号,因此通过模拟到数字转换器(Analog-to-Digital Converter,ADC)后的数字信号可以被简单地表示为:
y[n]=h2x[n]+h3B[m]x[n]+w[n]; 公式9Regarding the description of demodulating x[n] and B[m] at the UE receiving end, this application simply assumes that the channel is a single-path channel, and gNB uses an omnidirectional antenna to transmit the main signal, so it passes an analog-to-digital converter (Analog-to -Digital Converter, ADC) The digital signal can be simply expressed as:
y[n]=h 2 x[n]+h 3 B[m]x[n]+w[n]; Formula 9
y[n]=h2x[n]+h3B[m]x[n]+w[n]; 公式9Regarding the description of demodulating x[n] and B[m] at the UE receiving end, this application simply assumes that the channel is a single-path channel, and gNB uses an omnidirectional antenna to transmit the main signal, so it passes an analog-to-digital converter (Analog-to -Digital Converter, ADC) The digital signal can be simply expressed as:
y[n]=h 2 x[n]+h 3 B[m]x[n]+w[n]; Formula 9
值得注意的是,如果考虑共生反向散射多载波信号,并且gNB利用全向天线发送主信号的情况下,由于Tag在对次信号进行反向散射的时候可以控制反向散射的时间,如Tag在接收到主信号后的μNM时间后对次信号进行反向散射,即,在μ个OFDM符号期间Tag对接收主信号进行DFT运算,次信号调制,IDFT运算,最后进行反向散射。其中,根据Tag的能力,OFDM符号长度NM和OFDM符号数μ可以事先配置,UE接收端可以事先知道Tag对次信号的总调制时间,μNM。因此,UE接收端在进行检测x[n]和B[m]之前可以先有效地消除x[n-μNM]项。It is worth noting that if symbiotic backscattering multi-carrier signals are considered and gNB uses an omnidirectional antenna to transmit the main signal, Tag can control the backscattering time when backscattering the secondary signal, such as Tag The secondary signal is backscattered after μNM time after receiving the main signal, that is, during μ OFDM symbols, Tag performs DFT operation on the received main signal, modulation of the secondary signal, IDFT operation, and finally backscattering. Among them, according to the capability of the Tag, the OFDM symbol length NM and the number of OFDM symbols μ can be configured in advance, and the UE receiving end can know in advance the total modulation time of the secondary signal by the Tag, μNM. Therefore, the UE receiving end can effectively eliminate the x[n-μNM] term before detecting x[n] and B[m].
在gNB全向天线发送主信号的情况下,根据公式9,UE接收端接收到的数字信号y[n]被表示为:
y[n]=(h2+h3B[m])x[n]+w[n]; 公式10 In the case where the gNB transmits the main signal to the omnidirectional antenna, according to Equation 9, the digital signal y[n] received by the UE receiving end is expressed as:
y[n]=(h 2 +h 3 B[m])x[n]+w[n]; Formula 10
y[n]=(h2+h3B[m])x[n]+w[n]; 公式10 In the case where the gNB transmits the main signal to the omnidirectional antenna, according to Equation 9, the digital signal y[n] received by the UE receiving end is expressed as:
y[n]=(h 2 +h 3 B[m])x[n]+w[n]; Formula 10
如果简单假设参考信号占据每个调制块的第一个资源元,UE对主信号的解调符号可以表示为:
If we simply assume that the reference signal occupies the first resource element of each modulation block, the demodulation symbols of the main signal by the UE can be expressed as:
If we simply assume that the reference signal occupies the first resource element of each modulation block, the demodulation symbols of the main signal by the UE can be expressed as:
其中,n=2,3,...,N。Among them, n=2,3,...,N.
如果简单假设发送的参考信号为1,即x[1]=1,则UE的解调符号可以简化为
If we simply assume that the transmitted reference signal is 1, that is, x[1]=1, then the UE’s demodulation symbol can be simplified to
If we simply assume that the transmitted reference signal is 1, that is, x[1]=1, then the UE’s demodulation symbol can be simplified to
因此,显而易见,通过每个调制块设置参考信号,UE能够解调主信号数据符号最后通过信道解码器(Channel Decoder),对主信号进行比特信息解码,获取主信号数据比特信息
Therefore, it is obvious that by setting the reference signal for each modulation block, the UE is able to demodulate the main signal data symbols Finally, the channel decoder (Channel Decoder) is used to decode the bit information of the main signal and obtain the main signal data bit information.
值得注意的是,针对共生反向散射单载波信号,或共生反向散射多载波信号,或gNB利用波束赋形天线发送主信号,或gNB-Tag,gNB-UE,Tag-UE的链路信道是多径信道,UE通过以上相同的解调方法,能够解调主信号数据符号具体地,针对共生反向散射单载波信号,UE在时域对主信号数据符号进行解调,而针对共生反向散射多载波信号,UE在频域对主信号数据符号进行解调。在此不作一一说明。It is worth noting that for co-occurring backscattered single-carrier signals, or co-occurring backscattered multi-carrier signals, or gNB uses beamforming antennas to send main signals, or gNB-Tag, gNB-UE, Tag-UE link channels It is a multipath channel. The UE can demodulate the main signal data symbols through the same demodulation method as above. Specifically, for the co-occurring backscattered single-carrier signal, the UE demodulates the main signal data symbols in the time domain, and for the co-occurring backscattered multi-carrier signal, the UE demodulates the main signal data symbols in the frequency domain. No detailed explanation will be given here.
本申请实施例中,在主信号的时域信号或频域信号中***以次信号调制块为单位的第一参考信号,使得接收端设备根据该第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In the embodiment of the present application, a first reference signal in units of secondary signal modulation blocks is inserted into the time domain signal or frequency domain signal of the main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal. The main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the primary signal and the secondary signal in the symbiotic backscatter communication signal. The purpose of the signal.
可选地,本申请实施例中,所述发送端设备发送所述第一主信号,包括:Optionally, in this embodiment of the present application, the sending end device sends the first main signal, including:
在至少一组传输配置信息中,选取第一组传输配置信息,每组传输配置信息包括载波配置信息和与所述载波配置信息对应的天线配置信息;Select a first group of transmission configuration information from at least one group of transmission configuration information, each group of transmission configuration information including carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
根据所述第一组传输配置信息,发送所述第一主信号。The first main signal is sent according to the first set of transmission configuration information.
可选地,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二单载波配置信息以及发送端设备的全向天线配置信息;Optionally, the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
或者,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二多载波配置信息以及发送端设备的波束赋形天线配置信息。Alternatively, the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
这里,发送端设备在至少一组配置信息中,根据发送端设备使用的载波配置信息和反向散射通信设备使用的载波配置信息,来选取上述第一组传输配置信息。即在上述至少一组配置信息中选取与发送端设备使用的载波配置信息和反向散射通信设备使用的载波配置信息对应的发送端设备的全向天线配置信息。Here, the sending device selects the first set of transmission configuration information based on the carrier configuration information used by the sending device and the carrier configuration information used by the backscatter communication device from at least one set of configuration information. That is, the omnidirectional antenna configuration information of the transmitting end device corresponding to the carrier configuration information used by the transmitting end device and the carrier configuration information used by the backscattering communication device is selected from the above at least one set of configuration information.
可选地,本申请实施例的方法还包括:Optionally, the method in the embodiment of this application also includes:
根据测量量汇报信息或信道变化信息,更新所述至少一组传输配置信息。The at least one set of transmission configuration information is updated according to the measurement quantity reporting information or the channel change information.
可选地,所述传输配置信息与以下至少一项关联:
Optionally, the transmission configuration information is associated with at least one of the following:
业务QoS要求;Business QoS requirements;
反向散射通信设备能力;Backscatter communications equipment capabilities;
接收端设备能力;Receiver equipment capabilities;
发送端设备能力。Sender device capabilities.
本申请实施例中,上述至少一组传输配置信息可以是基站根据上述内容配置的。In this embodiment of the present application, the at least one set of transmission configuration information may be configured by the base station according to the above content.
具体的,从发送天线配置来看,gNB可以拥有全向天线或波束赋形天线,进行主信号x[n]的传输。从基于调制符号波形来看,gNB可以通过单载波或多载波承载主信号调制符号x[n],而Tag也可以通过单载波或多载波承载次信号调制符号B[m]。但是如何选择天线配置,主信号传输波形,次信号传输波形需要根据Passive IoT的具体业务类型而定。不同的Passive IoT业务类型拥有不同的服务质量(Quality-of-Service,QoS)要求,而每个业务的QoS由QoS参数(QoS Parameter)决定。如,QoS参数可以是Specifically, from the perspective of transmitting antenna configuration, gNB can have an omnidirectional antenna or a beamforming antenna to transmit the main signal x[n]. From the perspective of modulation symbol waveforms, gNB can carry the main signal modulation symbol x[n] through a single carrier or multiple carriers, and Tag can also carry the secondary signal modulation symbol B[m] through a single carrier or multiple carriers. However, how to choose the antenna configuration, main signal transmission waveform, and secondary signal transmission waveform needs to be determined according to the specific business type of Passive IoT. Different Passive IoT business types have different Quality-of-Service (QoS) requirements, and the QoS of each business is determined by the QoS Parameter. For example, QoS parameters can be
数据包传输优先度(Priority Level);Data packet transmission priority (Priority Level);
数据包的允许最大时延预算(Packet Delay Budget);The maximum allowable delay budget of a data packet (Packet Delay Budget);
误块率(Block Error Rate,BLER);Block Error Rate (BLER);
最大传输速率(Maximum Bit Rate,MBR);Maximum transmission rate (Maximum Bit Rate, MBR);
通信范围(Communication Range);Communication Range;
其他等。Others etc.
一般情况下,在Passive IoT业务开始之前,Tag需要通过gNB向Passive IoT服务器进行注册(Registration),并得到Passive IoT服务器的认证(Authentication)许可。因此gNB是完全知道Tag所被许可的业务(即,QoS参数),同时还获知Tag的允许能力(Tag Capability)。因此在接入层(Access Stratum Layer),首先针对Passive IoT业务(即,QoS要求)进行相关的RRC配置。RRC配置包括:对QoS参数的配置,对发送天线的配置,对gNB(或UE)和Tag载波承载配置。其中,发送天线的配置和载波承载配置要根据QoS要求而定。Generally, before the Passive IoT business starts, Tag needs to register with the Passive IoT server through gNB and obtain the Passive IoT server's authentication (Authentication) permission. Therefore, gNB fully knows the services allowed by the Tag (ie, QoS parameters), and also learns the Tag Capability. Therefore, at the Access Stratum Layer, the relevant RRC configuration is first performed for Passive IoT services (i.e., QoS requirements). RRC configuration includes: configuration of QoS parameters, configuration of transmitting antenna, and configuration of gNB (or UE) and Tag carrier bearer. Among them, the configuration of the transmitting antenna and the carrier bearer configuration are determined according to QoS requirements.
gNB(或UE)的载波承载配置和Tag的载波承载配置关系如表1所示。从表1中可以看到,载波承载配置的组合没有太多的限制,但是从实现的角度载波承载配置关系吻合度有所不同。当gNB(或UE)配置使用单载波的时候,Tag的载波承载配置可以依赖于单载波承载(即,载波承载选项一),也可以依赖于多载波承载(即,载波承载选项二)。当gNB(或UE)配置使用多载波的时候,Tag的载波承载配置既可以依赖于单载波承载(即,载波承载选项三),也可以依赖于多载波承载(即,载波承载选项四)。The relationship between the carrier bearer configuration of gNB (or UE) and the carrier bearer configuration of Tag is shown in Table 1. As can be seen from Table 1, there are not many restrictions on the combination of carrier bearer configurations, but from an implementation perspective, the consistency of the carrier bearer configuration relationships is different. When the gNB (or UE) is configured to use a single carrier, the tag's carrier bearer configuration can depend on the single carrier bearer (i.e., carrier bearer option one) or on multi-carrier bearer (i.e., carrier bearer option two). When the gNB (or UE) is configured to use multiple carriers, the tag's carrier bearer configuration can rely on either a single carrier bearer (ie, carrier bearer option three) or multiple carrier bearers (ie, carrier bearer option four).
其中,◎意味着gNB(或UE)和Tag的载波承载配置关系最为吻合。〇意味着gNB(或UE)和Tag的载波承载配置关系可以被采用,但并不是最佳配对。Among them, ◎ means that the carrier bearer configuration relationship between gNB (or UE) and Tag is the most consistent. ○ means that the carrier bearer configuration relationship between gNB (or UE) and Tag can be adopted, but it is not the optimal pairing.
值得注意的是,对于载波承载选项二,由于主信号是通过单载波调制的,而次信号是通过多载波调制的,因此主信号的时域信号必须添加CP,然后发送。这样的好处是,与OFDM信号一样,接收端可以通过频域均衡器(Frequency Equalization)来简单解调信号。
关于频域均衡器技术在本申请中不进行详细说明。It is worth noting that for carrier carrying option 2, since the main signal is modulated by a single carrier and the secondary signal is modulated by multiple carriers, CP must be added to the time domain signal of the main signal and then sent. The advantage of this is that, like OFDM signals, the receiving end can simply demodulate the signal through a frequency domain equalizer (Frequency Equalization). Frequency domain equalizer technology will not be described in detail in this application.
每个载波承载选项具有一定的特点。当Tag的允许能力比较低的情况下,Tag只能选择载波承载选项一,或载波承载选项三,取决于gNB(或UE)针对主信号配置的载波承载。但是,当Tag的允许能力比较高的情况下,Tag可以选择载波承载选项二,或载波承载选项四。Each carrier carrying option has certain characteristics. When the tag's allowed capability is relatively low, the tag can only choose carrier bearer option one or carrier bearer option three, depending on the carrier bearer configured by the gNB (or UE) for the main signal. However, when the tag's allowed capability is relatively high, the tag can choose carrier bearer option 2 or carrier bearer option 4.
值得注意的是,如果选择载波承载选项一和载波承载选项三的话,gNB(或UE)作为接收端需要配备复杂度高的均衡器来解调多径信道的共生反向散射信号。这种情况一般针对要求比较低的QoS业务。但是,如果选择载波承载选项三或载波承载选项四的话,gNB(或UE)作为接收端只需要配备单阶均衡器(Single Tap Equalization)通过频域处理方法抗衡多径信道的特点来解调多径信道的共生反向散射信号,以便提供整体的共生反向散射通信性能。这种情况一般是针对要求比较高的QoS业务。It is worth noting that if you choose carrier bearer option one and carrier bearer option three, the gNB (or UE) as the receiving end needs to be equipped with a highly complex equalizer to demodulate the co-occurring backscatter signals of the multipath channel. This situation generally applies to QoS services with relatively low requirements. However, if you choose carrier bearer option three or carrier bearer option four, the gNB (or UE) as the receiving end only needs to be equipped with a single-order equalizer (Single Tap Equalization) to counteract the characteristics of multipath channels through frequency domain processing methods to demodulate multiple The co-occurring backscatter signal of the path channel to provide overall co-occurring backscatter communication performance. This situation is generally for QoS services with relatively high requirements.
表1
Table 1
Table 1
gNB的天线配置和载波承载选项关系如表2所示。从表2中可以看到,针对不同载波承载选项,对发送天线配置也有一定的限制。如,当选择载波承载选项一和载波承载选项三的时候,发送天线配置可以选择全向天线传输。但是,当选择载波承载选项二和载波承载选项四的时候,发送天线配置最好选择波束赋形天线传输。这是因为,在全向天线传输情况下,gNB(或UE)接收端必须根据先前解调到的主信号对gNB-UE上的信号进行消除,然后才能解调共生反向散射通信信号。这对gNB(或UE)接收端的接收复杂度要求比较高。因此,当选择载波承载选项二或载波承载选项四的时候,gNB(或UE)发送端最好配置波束赋形来传输主信号,以便减轻对接收端的解调复杂度,从而提高共生反向散射通信的整体性能。这种情况一般是针对要求比较高的QoS业务。The relationship between gNB antenna configuration and carrier bearer options is shown in Table 2. As can be seen from Table 2, there are certain restrictions on transmitting antenna configurations for different carrier bearer options. For example, when selecting carrier bearer option one and carrier bearer option three, the transmitting antenna configuration can select omnidirectional antenna transmission. However, when selecting carrier bearer option two and carrier bearer option four, the transmitting antenna configuration is best to choose beamforming antenna transmission. This is because, in the case of omnidirectional antenna transmission, the gNB (or UE) receiving end must cancel the signal on the gNB-UE based on the previously demodulated main signal before demodulating the symbiotic backscattered communication signal. This requires relatively high reception complexity for the gNB (or UE) receiving end. Therefore, when selecting carrier bearer option 2 or carrier bearer option 4, the gNB (or UE) transmitter is best to configure beamforming to transmit the main signal in order to reduce the demodulation complexity of the receiver and thereby improve symbiotic backscatter Overall performance of communications. This situation is generally for QoS services with relatively high requirements.
其中,◎意味着gNB(或UE)选择的传输组合最为适合。〇意味着gNB(或UE)选择的传输组合比较适合。△意味着gNB(或UE)选择的传输组合可以被采用,但并不是很有效(如,从接收端的解调复杂度来看,需要使用特殊的设计方法)。Among them, ◎ means that the transmission combination selected by gNB (or UE) is the most suitable. 0 means that the transmission combination selected by gNB (or UE) is more suitable. △ means that the transmission combination selected by gNB (or UE) can be adopted, but it is not very effective (for example, from the perspective of demodulation complexity at the receiving end, special design methods need to be used).
表2
Table 2
Table 2
不同的传输组合可以应对不同的QoS要求。当gNB-Tag-UE间的信道变化而无法满足共生反向散射通信QoS要求的时候,传输组合也需要有所改变。比如,一般情况下,gNB
会通过对Tag和UE的定位,选择配对的Tag和UE。比较理想的配对是保持Tag和UE间的距离越短越好,因为这样可以增加gNB-Tag-UE间的整体信道增益。Different transmission combinations can cope with different QoS requirements. When the channel between gNB-Tag-UE changes and cannot meet the QoS requirements of symbiotic backscatter communication, the transmission combination also needs to be changed. For example, in general, gNB The paired Tag and UE will be selected by positioning the Tag and UE. The ideal pairing is to keep the distance between Tag and UE as short as possible, because this can increase the overall channel gain between gNB-Tag-UE.
一般情况下,UE具有一定的移动性,因此当Tag和UE间的距离变大的情况下,配置的传输组合需要被切换。共生反向散射通信自适应技术可以被考虑为一种根据链路信道的变化,对传输组合进行的切换技术。Generally, the UE has a certain degree of mobility, so when the distance between the Tag and the UE becomes larger, the configured transmission combination needs to be switched. Symbiotic backscatter communication adaptive technology can be considered as a technology that switches transmission combinations according to changes in link channels.
具体地,gNB可以根据业务QoS要求和Tag和/或UE的能力来配置两个以上的传输组合。gNB针对业务QoS要求,在配置的传输组合中选择适合的传输组合。在业务传输过程中,gNB可以根据UE的测量量汇报(Measurement Report)信息,通过L1信令或媒体接入控制(Medium Access Control,MAC)信令动态地调度传输组合,也可以通过RRC再配置静态地再配置传输组合,以便在满足业务QoS要求的同时,尽量减少Tag和/或UE的复杂度。Specifically, the gNB may configure more than two transmission combinations according to service QoS requirements and Tag and/or UE capabilities. Based on the service QoS requirements, gNB selects a suitable transmission combination among the configured transmission combinations. During the service transmission process, gNB can dynamically schedule transmission combinations through L1 signaling or Medium Access Control (MAC) signaling based on the UE's measurement report (Measurement Report) information, and can also be reconfigured through RRC Staticly reconfigure the transmission combination to minimize the complexity of Tag and/or UE while meeting service QoS requirements.
值得注意的是,减少Tag的复杂度,等同于减少对Tag能量消耗。另外,如果使用波束赋形的传输方法,不但有利于增强对Tag的通信范围,而且获取更多的波束赋形所得能量。It is worth noting that reducing the complexity of Tag is equivalent to reducing Tag energy consumption. In addition, if the beamforming transmission method is used, it will not only enhance the communication range of the Tag, but also obtain more energy from beamforming.
本申请实施例中,通过根据业务QoS要求以及UE的移动性,能够有效地自适应调整主信号和次信号的传输波形。In the embodiment of the present application, the transmission waveforms of the primary signal and the secondary signal can be effectively and adaptively adjusted according to the service QoS requirements and the mobility of the UE.
本申请实施例的信号处理方法,发送端设备在主信号的每个调制块中***K个第一参考信号,得到第一主信号,使得接收端设备根据该第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的,且能够有效地自适应调整主信号和次信号的传输波形。In the signal processing method of the embodiment of the present application, the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively process the signal based on the first reference signal. The first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. signal and secondary signal, and can effectively adaptively adjust the transmission waveforms of the primary signal and secondary signal.
如图11所示,本申请实施例还提供了一种信号处理方法,包括:As shown in Figure 11, this embodiment of the present application also provides a signal processing method, including:
步骤1101:反向散射通信设备接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;Step 1101: The backscatter communication device receives the first main signal. The first main signal includes M modulation blocks. Each of the modulation blocks includes K first reference signals, 1≤K≤N, and N is each The number of resource units included in each of the modulation blocks, K is a positive integer, N≥2, and M and N are positive integers;
步骤1102:所述反向散射通信设备根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。Step 1102: The backscatter communication device modulates M secondary signals according to the first primary signal to obtain modulated secondary signals.
可选地,上述反向散射通信设备可具体为Tag。Optionally, the above-mentioned backscatter communication device may be specifically a Tag.
可选地,所述方法还包括:所述反向散射通信设备发送所述调制后的次信号。Optionally, the method further includes: the backscatter communication device sending the modulated secondary signal.
具体的,反向散射通信设备反向散射调制后的次信号。Specifically, the backscatter communication device backscatters the modulated secondary signal.
本申请实施例中,通过包含第一参考信号的第一主信号对次信号进行调制,得到调制后的次信号并反向散射,从而使得接收端设备能够根据第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In the embodiment of the present application, the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal. The first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
可选地,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相
反的两个第二参考信号。Optionally, the M secondary signals include a second reference signal, or include signals with the same length and phase. The opposite of the two second reference signals.
可选地,所述第二参考信号对应的资源单元的数量与P个调制块对应的资源单元的数量相同,1≤P<M/2。Optionally, the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1≤P<M/2.
作为第三种可选地实现方式,所述第一主信号中的调制块为主信号的时域信号对应的调制块;As a third optional implementation manner, the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal;
所述反向散射通信设备根据所述第一主信号对M个次信号进行调制,得到调制后的次信号,包括:The backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:
根据主信号的时域信号对应的调制块,对M个次信号进行调制,得到调制后的次信号。According to the modulation block corresponding to the time domain signal of the main signal, the M secondary signals are modulated to obtain modulated secondary signals.
作为第四种可选地实现方式,所述第一主信号中的调制块为主信号的频域信号对应的调制块;As a fourth optional implementation manner, the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal;
所述反向散射通信设备根据所述第一主信号对M个次信号进行调制,得到调制后的次信号,包括:The backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:
对主信号的频域信号对应的调制块进行离散傅里叶变换DFT处理,得到目标调制块;Perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain the target modulation block;
根据所述目标调制块对所述M个次信号进行调制,得到第一次信号;Modulate the M secondary signals according to the target modulation block to obtain the primary signal;
对所述第一次信号进行离散傅里叶逆变换IDFT处理,得到调制后的次信号。The primary signal is subjected to an inverse discrete Fourier transform (IDFT) process to obtain a modulated secondary signal.
可选地,所述一个第二参考信号对应一个参考序列,或者,所述两个第二参考信号对应一个参考序列。Optionally, the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
可选地,上述一个第二参考信号或两个第二参考信号位于所述M个次信号的前P*N个资源元中。Optionally, the above-mentioned one second reference signal or two second reference signals are located in the first P*N resource elements of the M secondary signals.
本申请实施例中,与主信号相同,解调次信号也需要配备相应的参考信号(上述第二参考信号)。在共生反向散射通信中,Tag调制每个次信号数据符号在每个调制块上,然后Tag反向散射长度为M个传输块(调制块)的次信号到UE。为了有效解调次信号数据符号B[m],针对每M个次信号,需要配备两个第二参考信号,每个第二参考信号的长度与P个调制块对应的长度相同,其中P为整数,1≤P<M/2。具体地,由于调制信号可以是BPSK信号,在第一个第二参考信号中,Tag用B[m]=1调制在反向散射参考信号上。在第二个第二参考信号中,Tag用B[m]=-1调制在反向散射参考信号上。在其余符号中,Tag调制反向散射数据符号B[m],如图12所示。In the embodiment of the present application, like the main signal, the demodulated secondary signal also needs to be equipped with a corresponding reference signal (the above-mentioned second reference signal). In symbiotic backscatter communication, Tag modulates each secondary signal data symbol on each modulation block, and then Tag backscatters the secondary signal with a length of M transmission blocks (modulation blocks) to the UE. In order to effectively demodulate the secondary signal data symbols B[m], for each M secondary signals, two second reference signals need to be equipped. The length of each second reference signal is the same as the length corresponding to the P modulation blocks, where P is Integer, 1≤P<M/2. Specifically, since the modulated signal may be a BPSK signal, in the first second reference signal, Tag is modulated on the backscattered reference signal with B[m]=1. In the second second reference signal, Tag is modulated on the backscattered reference signal with B[m]=-1. Among the remaining symbols, Tag modulates the backscattered data symbol B[m], as shown in Figure 12.
值得注意的是,次信号相关的参考信号分配资源元数可以通过L1信令或MAC CE信令进行通知,也可以通过RRC进行配置。可选地,每个第二参考信号可以附加地参考序列,而参考序列配置可以通过RRC进行。但是,利用参考序列配置的两个第二参考信号在经过加权平均运算后,对Tag-UE的信道链路相位必须保证是相反的。It is worth noting that the number of reference signal allocation resource elements related to secondary signals can be notified through L1 signaling or MAC CE signaling, or configured through RRC. Optionally, each second reference signal may additionally have a reference sequence, and the reference sequence configuration may be performed through RRC. However, after the weighted average operation of the two second reference signals configured using the reference sequence, the channel link phase for the Tag-UE must be guaranteed to be opposite.
同样地,针对UE接收端解调x[n]和B[m]的说明,本申请中简单地假设信道是单径信道,gNB利用全向天线发送主信号,因此如公式9所示,通过ADC后的数字信号可以被简单地表示为:
y[n]=(h2+h3B[m])x[n]+w[n]; 公式13Similarly, for the description of demodulating x[n] and B[m] at the UE receiving end, this application simply assumes that the channel is a single-path channel, and gNB uses an omnidirectional antenna to transmit the main signal. Therefore, as shown in Equation 9, The digital signal after ADC can be simply expressed as:
y[n]=(h 2 +h 3 B[m])x[n]+w[n]; Formula 13
y[n]=(h2+h3B[m])x[n]+w[n]; 公式13Similarly, for the description of demodulating x[n] and B[m] at the UE receiving end, this application simply assumes that the channel is a single-path channel, and gNB uses an omnidirectional antenna to transmit the main signal. Therefore, as shown in Equation 9, The digital signal after ADC can be simply expressed as:
y[n]=(h 2 +h 3 B[m])x[n]+w[n]; Formula 13
利用上述方案中解码到的主信号数字比特信息复制主信号符号然后,通过复制主信号符号UE首先对接收的每个共生反向散射调制块进行加权平均处理,即,
Using the main signal digital bit information decoded in the above scheme Copy the main signal symbol Then, copy the main signal symbol by The UE first performs a Weighted average processing, that is,
Using the main signal digital bit information decoded in the above scheme Copy the main signal symbol Then, copy the main signal symbol by The UE first performs a Weighted average processing, that is,
值得注意的是,被估计的主信号和复制的主信号符号是有所不同的。前者拥有更高的误码率,而后者由于信道编解码增益的原因通常误码率会非常低。It is worth noting that the estimated main signal and the copied main signal symbol is different. The former has a higher bit error rate, while the latter usually has a very low bit error rate due to the channel coding and decoding gain.
假设主信号数字符号解调错误率非常小并可以忽略不计的话,被加权平均后的共生反向散射调制块信号可以被近似为:
Assuming that the main signal digital symbol demodulation error rate is very small and can be ignored, the weighted average co-occurring backscatter modulation block signal can be approximated as:
Assuming that the main signal digital symbol demodulation error rate is very small and can be ignored, the weighted average co-occurring backscatter modulation block signal can be approximated as:
其中,是被加权平均后的AWGN噪声。in, is the weighted average AWGN noise.
利用第一个第二参考信号,UE可以简单地获取以下信号:
Using the first second reference signal, the UE can simply obtain the following signal:
Using the first second reference signal, the UE can simply obtain the following signal:
而利用第二个第二参考信号,UE可以简单地获取以下信号:
Using the second second reference signal, the UE can simply obtain the following signal:
Using the second second reference signal, the UE can simply obtain the following signal:
通过求解由公式16和公式17组成方程,UE可以获取信道响应h2和h3。最后,根据公式15,UE可以解调次信号数据符号B[m],其中,m=2P+1,...,M。By solving the equations composed of Equation 16 and Equation 17, the UE can obtain the channel responses h 2 and h 3 . Finally, according to Equation 15, the UE can demodulate the secondary signal data symbols B[m], where m=2P+1,...,M.
值得注意的是,对于主信号数据符号的解调性能,可以通过降低主信号数据符号的码率(即,Code Rate)来提高信道编码增益。而对于次信号数据符号的解调性能,可以通过选择较大的调制块N值来提高以增加处理增益(Processing Gain)。It is worth noting that for the demodulation performance of the main signal data symbols, the channel coding gain can be improved by reducing the code rate (ie, Code Rate) of the main signal data symbols. The demodulation performance of secondary signal data symbols can be improved by selecting a larger modulation block N value to increase the processing gain (Processing Gain).
值得注意的是,如果gNB使用波束赋形传输主信号的话,由于gNB到UE的链路增益小到可以被忽略不计,因此针对每M个次信号只需要***一个第二参考信号就可以有效解调次信号数据符号B[m]。It is worth noting that if gNB uses beamforming to transmit the main signal, since the link gain from gNB to UE is so small that it can be ignored, only one second reference signal needs to be inserted for every M secondary signals to effectively solve the problem. Modulation signal data symbol B[m].
值得注意的是,本申请中所述的次信号数据调制方法只要是通过BPSK进行的。为了确保相干检测,次信号数据传输需要通过发送参考信号来完成。可选地,如果次信号数据调制使用DASK,DPSK,DAPSK差分调制方式的话,次***中可以再不需要加入第二参考信号即可完成信号解调。It is worth noting that the secondary signal data modulation method described in this application only needs to be performed through BPSK. In order to ensure coherent detection, secondary signal data transmission needs to be completed by sending a reference signal. Optionally, if the secondary signal data modulation uses DASK, DPSK, or DAPSK differential modulation methods, the secondary system can complete signal demodulation without adding a second reference signal.
本申请实施例中,通过包含第一参考信号的第一主信号对次信号进行调制,得到调制后的次信号并反向散射,从而使得接收端设备能够根据第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。
In the embodiment of the present application, the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal. The first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
如图13所示,本申请实施例还提供了一种信号处理方法,包括:As shown in Figure 13, this embodiment of the present application also provides a signal processing method, including:
步骤1301:接收端设备获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Step 1301: The receiving end device acquires the first main signal, and performs coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain the first main signal. data, the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
本申请实施例中,接收端设备可以具体为终端或基站,在上述发送端设备为基站的情况下,该接收端设备为终端,在上述发送端设备为终端的情况下,该接收端设备为基站。In the embodiment of the present application, the receiving end device may be a terminal or a base station. When the sending end device is a base station, the receiving end device is a terminal. When the sending end device is a terminal, the receiving end device is base station.
步骤1302:所述接收端设备获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。Step 1302: The receiving end device obtains the symbiotic backscattering modulation block, performs coherent demodulation processing on the symbiotic backscattering modulation block according to the first primary signal, and obtains data in the secondary signal, and M is a positive integer. .
可选地,所述共生反向散射调制块包括调制后的次信号和噪声信号。Optionally, the co-occurring backscatter modulation block includes a modulated secondary signal and a noise signal.
需要说明的是,本申请实施例中可以先获取第一主信号再获取共生反向散射调制块,也可以先获取共生反向散射调制块,再获取第一主信号,还可以同时获取第一主信号和共生反向散射调制块。另外本申请实施例中在对信号进行处理时,先对第一主信号进行解调处理,然后再根据解调后的第一主信号对共生反向散射调制块进行解调处理。It should be noted that in the embodiment of the present application, the first main signal can be acquired first and then the symbiotic backscattering modulation block can be acquired, or the symbiotic backscattering modulation block can be acquired first and then the first main signal can be acquired, or the first main signal can be acquired at the same time. Main signal and co-occurring backscatter modulation blocks. In addition, in the embodiment of the present application, when processing the signal, the first main signal is first demodulated, and then the symbiotic backscattering modulation block is demodulated according to the demodulated first main signal.
本申请实施例中,接收端设备根据第一主信号中的第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In the embodiment of the present application, the receiving end device can simply and effectively perform coherent demodulation and decoding of the first main signal based on the first reference signal in the first main signal, and can further perform coherent demodulation and decoding of the demodulated first main signal based on the first reference signal in the first main signal. The data demodulates the secondary signal, thereby achieving the purpose of simply demodulating the primary signal and secondary signal in the symbiotic backscatter communication signal.
可选地,根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到主信号中的数据,包括:Optionally, perform coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain data in the main signal, including:
根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调,得到第一主信号估计值
Coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate.
通过信道解码器对所述第一主信号估计值进行比特解码处理,得到所述第一主信号中的数据(即主信号数据比特信息)。The channel decoder performs bit decoding processing on the first main signal estimated value to obtain the data in the first main signal (ie, the main signal data bit information ).
需要说明的是,接收端设备根据第一参考信号对第一主信号进行相干解调和解码处理的过程,已在发送端设备的实施例中进行详细描述,此处不再赘述。It should be noted that the process of coherent demodulation and decoding of the first main signal by the receiving end device based on the first reference signal has been described in detail in the embodiment of the transmitting end device and will not be described again here.
可选地,所述调制后的次信号是通过第一主信号对M个次信号进行调制得到的,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号;Optionally, the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
根据所述第一主信号对所述调制后的次信号进行相干解调处理,得到次信号中的数据,包括:Perform coherent demodulation processing on the modulated secondary signal according to the first main signal to obtain data in the secondary signal, including:
对所述第一主信号进行复制处理,得到复制后的主信号
Copy the first main signal to obtain the copied main signal
通过复制后的主信号对所述共生反向散射调制块进行加权平均处理,得到处理后的共生反向散射调制块;Perform weighted average processing on the co-occurring backscattering modulation block by using the copied main signal to obtain a processed co-occurring backscattering modulation block;
根据所述处理后的共生反向散射调制块中的第二参考信号对所述处理后的共生反向散射调制块进行相干解调处理,得到次信号中的数据。
The processed co-occurring back-scattering modulation block is coherently demodulated according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain data in the secondary signal.
需要说明的是,接收端设备根据所述第一主信号对所述调制后的次信号进行相干解调处理,得到次信号中的数据的过程,已在反向散射通信设备的实施例中进行详细描述,此处不再赘述。It should be noted that the receiving end device performs coherent demodulation processing on the modulated secondary signal according to the first main signal to obtain the data in the secondary signal, which has been carried out in the embodiment of the backscatter communication device. Detailed description will not be repeated here.
在本申请的一实施例中,UE接收端分层解调是通过在主信号和次信号中分别设置参考信号完成的。具体地,针对主信号,种类-I参考信号(第一参考信号)被***主信号数字符号中,形成长度为N=4的调制块。针对次信号,种类-II参考信号(第二参考信号)被***次信号数字符号中,形成两个第二参考信号,每个第二参考信号的长度与一个调制块的长度相同,即P=1,如图14所示。在主信号和次信号数字符号分层解调过程中,UE先利用发送端设备实施例中描述的解调方法解调主信号相关的数字符号x[n],然后利用反向散射通信设备实施例中描述的解调方法解调次信号相关的数字符号B[m]。In an embodiment of the present application, hierarchical demodulation at the UE receiving end is completed by setting reference signals in the primary signal and the secondary signal respectively. Specifically, for the main signal, the Type-I reference signal (first reference signal) is inserted into the main signal digital symbols to form a modulation block with a length of N=4. For the secondary signal, the Type-II reference signal (second reference signal) is inserted into the digital symbols of the secondary signal to form two second reference signals. The length of each second reference signal is the same as the length of one modulation block, that is, P = 1, as shown in Figure 14. In the hierarchical demodulation process of the digital symbols of the primary signal and the secondary signal, the UE first uses the demodulation method described in the transmitting end device embodiment to demodulate the digital symbols x[n] related to the primary signal, and then uses the backscatter communication equipment to implement The demodulation method described in the example demodulates the digital symbol B[m] associated with the secondary signal.
UE接收端分层解调方法适用于在TProc=0的情况下的全向天线传输,或者适用于在TProc≠0的情况下的波束赋形传输。TProc是Tag接收端对接收信号的DFT和IDFT的处理时间。关于TProc≠0的情况下的全向天线传输场景,在此不做具体说明。因为UE接收端只要根据先前解调到的主信号对gNB-UE上的信号进行消除处理,然后利用实施例中同样的分层解调方法就能解调共生反向散射通信信号。The hierarchical demodulation method at the UE receiving end is suitable for omnidirectional antenna transmission when T Proc = 0, or for beamforming transmission when T Proc ≠ 0. T Proc is the processing time of DFT and IDFT of the received signal by the Tag receiving end. Regarding the omnidirectional antenna transmission scenario when T Proc ≠0, no detailed explanation will be given here. Because the UE receiving end only needs to perform cancellation processing on the gNB-UE signal based on the previously demodulated main signal, and then use the same layered demodulation method in the embodiment to demodulate the symbiotic backscatter communication signal.
图15所示的是UE接收端分层解调的过程。UE接收端包括主信号接收器,信道解码器,组信号符号复制器,延迟器,次信号接收器。Figure 15 shows the layered demodulation process at the UE receiving end. The UE receiving end includes a primary signal receiver, a channel decoder, a group signal symbol replicator, a delayer, and a secondary signal receiver.
其中,延迟器中的T是主信号接收器,信道解码器和主信号符号复制器的整体处理时间。另外,是否在实施例中***DFT块取决于使用单载波还是使用多载波。Where, T in the delayer is the overall processing time of the main signal receiver, channel decoder and main signal symbol replicator. Additionally, whether a DFT block is inserted in an embodiment depends on whether a single carrier or multiple carriers are used.
值得注意的是,如果主信号发送端针对时域每调制块***种类-I参考信号,而载波承载选项是载波承载选项三的话,主信号接收器利用种类-I参考信号对接收信号进行相位翻转后,主信号接收器需要进行DFT运算,从而获取在频域的主信号调制符号。It is worth noting that if the main signal transmitter inserts a Type-I reference signal for each modulation block in the time domain, and the carrier bearer option is carrier option three, the main signal receiver uses the Type-I reference signal to phase invert the received signal. Finally, the main signal receiver needs to perform a DFT operation to obtain the main signal modulation symbols in the frequency domain.
具体的,如公式9表示,UE接收端接收到的共生反向散射数字信号y[n]可以被表示为
y[n]=(h2+h3B[m])x[n]+w[n];Specifically, as expressed in Equation 9, the symbiotic backscattering digital signal y[n] received by the UE receiving end can be expressed as
y[n]=(h 2 +h 3 B[m])x[n]+w[n];
y[n]=(h2+h3B[m])x[n]+w[n];Specifically, as expressed in Equation 9, the symbiotic backscattering digital signal y[n] received by the UE receiving end can be expressed as
y[n]=(h 2 +h 3 B[m])x[n]+w[n];
主信号接收器根据主信号中***的参考信号解调主信号x[n],得到主信号估计值然后通过信道解码器对其进行信息比特解码,并获取主信号数据
The main signal receiver demodulates the main signal x[n] according to the reference signal inserted in the main signal to obtain the main signal estimate. Then the information bits are decoded through the channel decoder and the main signal data is obtained
次信号接收器根据T迟延后的共生反向散射数字信号y[n-T],经过主信号数据符号复制的主信号获取被加权平均后的共生反向散射调制块信号。如公式15所示,共生反向散射调制块信号可以被近似为
The secondary signal receiver passes through the primary signal data based on the symbiotic backscattered digital signal y[nT] delayed by T. main signal for symbol duplication Obtain the weighted average co-occurrence backscatter modulation block signal. As shown in Equation 15, the co-occurring backscatter modulation block signal can be approximated as
The secondary signal receiver passes through the primary signal data based on the symbiotic backscattered digital signal y[nT] delayed by T. main signal for symbol duplication Obtain the weighted average co-occurrence backscatter modulation block signal. As shown in Equation 15, the co-occurring backscatter modulation block signal can be approximated as
然后,根据次信号中***的种类-II参考信号解调次信号B[m],得到次信号估计值
Then, the secondary signal B[m] is demodulated according to the Type-II reference signal inserted in the secondary signal to obtain the secondary signal estimate.
值得注意的是,被估计的主信号和复制的主信号符号是有所不同的。前者拥有更高的误码率,而后者由于信道解码增益的原因通常误码率会非常低。It is worth noting that the estimated main signal and the copied main signal symbol is different. The former has a higher bit error rate, while the latter usually has a very low bit error rate due to channel decoding gain.
本申请实施例中,接收端设备根据第一主信号中的第一参考信号能够简单有效地对该
第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In the embodiment of the present application, the receiving end device can simply and effectively respond to the first reference signal in the first main signal. The first main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the main signal in the symbiotic backscatter communication signal. and sub-signal purposes.
本申请实施例提供的信号处理方法,执行主体可以为信号处理装置。本申请实施例中以信号处理装置执行信号处理方法为例,说明本申请实施例提供的信号处理装置。For the signal processing method provided by the embodiments of the present application, the execution subject may be a signal processing device. In the embodiment of the present application, a signal processing device executing a signal processing method is used as an example to illustrate the signal processing device provided by the embodiment of the present application.
如图16所示,本申请实施例提供了一种信号处理装置1600,应用于发送端设备,包括:As shown in Figure 16, this embodiment of the present application provides a signal processing device 1600, which is applied to the sending end device and includes:
第一调制模块1601,用于发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号;The first modulation module 1601 is used by the sending end device to modulate the main signal in the symbiotic backscattering communication signal to obtain the first main signal;
其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
可选地,所述装置还包括:Optionally, the device also includes:
第一发送模块,用于发送所述第一主信号。The first sending module is used to send the first main signal.
可选地,所述第一调制模块包括:Optionally, the first modulation module includes:
第一获取子模块,用于获取所述主信号对应的时域信号;The first acquisition sub-module is used to acquire the time domain signal corresponding to the main signal;
第一划分子模块,用于将所述时域信号划分为一个或多个调制块;A first dividing submodule, used to divide the time domain signal into one or more modulation blocks;
第二获取子模块,用于在所述时域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。The second acquisition submodule is used to insert K first reference signals into each modulation block corresponding to the time domain signal to obtain the first main signal.
可选地,所述第一调制模块包括:Optionally, the first modulation module includes:
第三获取子模块,用于获取所述主信号对应的频域信号;The third acquisition sub-module is used to acquire the frequency domain signal corresponding to the main signal;
第二划分子模块,用于将所述频域信号划分为一个或多个调制块;a second dividing submodule, used to divide the frequency domain signal into one or more modulation blocks;
第四获取子模块,用于在所述频域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。The fourth acquisition sub-module is used to insert K first reference signals into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
可选地,每个所述调制块中的K个参考信号对应一个参考序列,或者,所述第一主信号中的K*M个参考信号对应一个参考序列。Optionally, K reference signals in each modulation block correspond to a reference sequence, or K*M reference signals in the first main signal correspond to a reference sequence.
可选地,所述第一发送模块包括:Optionally, the first sending module includes:
第一选择子模块,用于在至少一组传输配置信息中,选取第一组传输配置信息,每组传输配置信息包括载波配置信息和与所述载波配置信息对应的天线配置信息;A first selection submodule configured to select a first group of transmission configuration information from at least one group of transmission configuration information, where each group of transmission configuration information includes carrier configuration information and antenna configuration information corresponding to the carrier configuration information;
第一发送子模块,用于根据所述第一组传输配置信息,发送所述第一主信号。The first sending sub-module is configured to send the first main signal according to the first set of transmission configuration information.
可选地,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二单载波配置信息以及发送端设备的全向天线配置信息;Optionally, the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
或者,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二多载波配置信息以及发送端设备的波束赋形天线配置信息。
Alternatively, the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
可选地,所述传输配置信息与以下至少一项关联:Optionally, the transmission configuration information is associated with at least one of the following:
业务QoS要求;Business QoS requirements;
反向散射通信设备能力;Backscatter communications equipment capabilities;
接收端设备能力;Receiver equipment capabilities;
发送端设备能力。Sender device capabilities.
可选地,本申请实施例的装置,还包括:Optionally, the device of the embodiment of the present application also includes:
更新模块,用于根据测量量汇报信息或信道变化信息,更新所述至少一组传输配置信息。An update module, configured to update the at least one set of transmission configuration information according to measurement quantity reporting information or channel change information.
可选地,本申请实施例的装置,还包括:Optionally, the device of the embodiment of the present application also includes:
第一确定模块,用于根据L1信令、媒体接入控制单元MAC CE信令或无线资源控制RRC配置信息,确定N和K中的至少一项。The first determination module is used to determine at least one of N and K based on L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
可选地,所述K个第一参考信号位于所述调制块的前N个资源单元中,且每个所述第一参考信号对应一个资源单元。Optionally, the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
本申请实施例的装置,发送端设备在主信号的每个调制块中***K个第一参考信号,得到第一主信号,使得接收端设备根据该第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In the device of the embodiment of the present application, the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal. A primary signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the demodulated data of the first primary signal, thereby achieving simple demodulation of the primary signal and the symbiotic backscattering communication signal. The purpose of the secondary signal.
如图17所示,本申请实施例还提供了一种信号处理装置1700,应用于反向散射通信设备,包括:As shown in Figure 17, this embodiment of the present application also provides a signal processing device 1700, which is applied to backscatter communication equipment, including:
第一接收模块1701,用于接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The first receiving module 1701 is used to receive the first main signal. The first main signal includes M modulation blocks. Each of the modulation blocks includes K first reference signals, 1≤K≤N, and N is each The number of resource units included in each of the modulation blocks, K is a positive integer, N≥2, and M and N are positive integers;
第二调制模块1702,用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。The second modulation module 1702 is used to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
可选地,本申请实施例的装置,还包括:Optionally, the device of the embodiment of the present application also includes:
第二发送模块,用于发送所述调制后的次信号。The second sending module is used to send the modulated secondary signal.
可选地,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号。Optionally, the M secondary signals include one second reference signal, or two second reference signals with the same length and opposite phases.
可选地,所述第二参考信号对应的资源单元的数量与P个调制块对应的资源单元的数量相同,1≤P<M/2。Optionally, the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1≤P<M/2.
可选地,所述第一主信号中的调制块为主信号的时域信号对应的调制块;Optionally, the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal;
所述第二调制模块用于根据主信号的时域信号对应的调制块,对M个次信号进行调制,得到调制后的次信号。The second modulation module is used to modulate M secondary signals according to the modulation block corresponding to the time domain signal of the main signal to obtain modulated secondary signals.
可选地,所述第一主信号中的调制块为主信号的频域信号对应的调制块;Optionally, the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal;
所述第二调制模块包括:
The second modulation module includes:
第四处理子模块,用于对主信号的频域信号对应的调制块进行离散傅里叶变换DFT处理,得到目标调制块;The fourth processing submodule is used to perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain the target modulation block;
第五处理子模块,用于根据所述目标调制块对所述M个次信号进行调制,得到第一次信号;The fifth processing submodule is used to modulate the M secondary signals according to the target modulation block to obtain the first signal;
第六处理子模块,用于对所述第一次信号进行离散傅里叶逆变换IDFT处理,得到调制后的次信号。The sixth processing sub-module is used to perform inverse discrete Fourier transform IDFT processing on the primary signal to obtain a modulated secondary signal.
可选地,所述一个第二参考信号对应一个参考序列,或者,所述两个第二参考信号对应一个参考序列。Optionally, the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
本申请实施例中,通过包含第一参考信号的第一主信号对次信号进行调制,得到调制后的次信号并反向散射,从而使得接收端设备能够根据第一参考信号能够简单有效地对该第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In the embodiment of the present application, the secondary signal is modulated by the first main signal including the first reference signal, and the modulated secondary signal is obtained and backscattered, so that the receiving end device can simply and effectively process the signal according to the first reference signal. The first primary signal is subjected to coherent demodulation and decoding processing, and then the secondary signal can be demodulated according to the data of the demodulated first primary signal, thereby achieving simple demodulation of the primary signal in the symbiotic backscatter communication signal. Purpose of signals and sub-signals.
如图18所示,本申请实施例还提供了一种信号处理装置1800,应用于接收端设备,包括:As shown in Figure 18, this embodiment of the present application also provides a signal processing device 1800, which is applied to the receiving end device and includes:
第一处理模块1801,用于获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The first processing module 1801 is used to obtain the first main signal, and perform coherent demodulation and decoding on the first main signal according to the first reference signal in the first main signal to obtain the first main signal. The first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block. Quantity, K is a positive integer, N≥2, and M and N are positive integers;
第二处理模块1802,用于获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。The second processing module 1802 is used to obtain the symbiotic backscattering modulation block, perform coherent demodulation processing on the symbiotic backscattering modulation block according to the first main signal, and obtain the data in the secondary signal, and M is a positive integer. .
可选地,所述第一处理模块包括:Optionally, the first processing module includes:
第一解调子模块,用于根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调,得到第一主信号估计值;A first demodulation submodule, configured to coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate;
第一解码子模块,用于通过信道解码器对所述第一主信号估计值进行比特解码处理,得到所述第一主信号中的数据。The first decoding submodule is configured to perform bit decoding processing on the first main signal estimated value through a channel decoder to obtain data in the first main signal.
可选地,所述调制后的次信号是通过第一主信号对M个次信号进行调制得到的,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号;Optionally, the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
所述第二处理模块包括:The second processing module includes:
第一处理子模块,用于对所述第一主信号进行复制处理,得到复制后的主信号;The first processing sub-module is used to perform copy processing on the first main signal to obtain the copied main signal;
第二处理子模块,用于通过复制后的主信号对所述共生反向散射调制块进行加权平均处理,得到处理后的共生反向散射调制块;The second processing submodule is used to perform weighted average processing on the symbiotic backscattering modulation block through the copied main signal to obtain the processed symbiotic backscattering modulation block;
第三处理子模块,用于根据所述处理后的共生反向散射调制块中的第二参考信号对所述处理后的共生反向散射调制块进行相干解调处理,得到次信号中的数据。The third processing sub-module is used to perform coherent demodulation processing on the processed co-occurring back-scattering modulation block according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain the data in the secondary signal. .
本申请实施例中,接收端设备根据第一主信号中的第一参考信号能够简单有效地对该
第一主信号进行相干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In the embodiment of the present application, the receiving end device can simply and effectively respond to the first reference signal in the first main signal. The first main signal is coherently demodulated and decoded, and then the secondary signal can be demodulated according to the data of the demodulated first main signal, thereby achieving simple demodulation of the main signal in the symbiotic backscatter communication signal. and sub-signal purposes.
本申请实施例中的信号处理装置可以是电子设备,例如具有操作***的电子设备,也可以是电子设备中的部件,例如集成电路或芯片。该电子设备可以是终端,也可以为除终端之外的其他设备。示例性的,终端可以包括但不限于上述所列举的终端11的类型,其他设备可以为服务器、网络附属存储器(Network Attached Storage,NAS)等,本申请实施例不作具体限定。The signal processing device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.
本申请实施例提供的信号处理装置能够实现图5至图15的方法实施例实现的各个过程,并达到相同的技术效果,为避免重复,这里不再赘述。The signal processing device provided by the embodiments of the present application can implement each process implemented by the method embodiments in Figures 5 to 15 and achieve the same technical effect. To avoid duplication, details will not be described here.
可选地,如图19所示,本申请实施例还提供一种通信设备1900,包括处理器1901和存储器1902,存储器1902上存储有可在所述处理器1901上运行的程序或指令,例如,该通信设备1900为终端时,该程序或指令被处理器m01执行时实现上述发送端设备、反向散射通信设备或接收端设备执行的信号处理方法实施例的各个步骤,且能达到相同的技术效果。该通信设备1900为网络侧设备时,该程序或指令被处理器1901执行时实现上述发送端设备、反向散射通信设备或接收端设备执行的信号处理方法实施例的各个步骤,且能达到相同的技术效果,为避免重复,这里不再赘述。Optionally, as shown in Figure 19, this embodiment of the present application also provides a communication device 1900, which includes a processor 1901 and a memory 1902. The memory 1902 stores programs or instructions that can be run on the processor 1901, such as , when the communication device 1900 is a terminal, when the program or instruction is executed by the processor m01, each step of the signal processing method embodiment executed by the above-mentioned sending end device, backscattering communication device or receiving end device is implemented, and the same can be achieved. technical effects. When the communication device 1900 is a network-side device, when the program or instruction is executed by the processor 1901, each step of the signal processing method embodiment executed by the sending end device, the backscattering communication device or the receiving end device is implemented, and the same can be achieved. The technical effects will not be repeated here to avoid repetition.
本申请实施例还提供一种终端,包括处理器和通信接口,处理器用于对共生反向散射通信信号中的主信号进行调制,得到第一主信号;其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;An embodiment of the present application also provides a terminal, including a processor and a communication interface. The processor is configured to modulate the main signal in the symbiotic backscattering communication signal to obtain a first main signal; wherein the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers;
或者,通信接口用于接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数,处理器用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号;Alternatively, the communication interface is used to receive a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks includes K first reference signals, 1≤K≤N, N is each The number of resource units included in the modulation block, K is a positive integer, N≥2, and M and N are positive integers. The processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal;
或者,处理器用于获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;Alternatively, the processor is configured to acquire the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal. , the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers;
获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。Obtain the co-occurring backscattering modulation block, perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal, and obtain data in the secondary signal, and M is a positive integer.
该终端实施例与上述方法实施例对应,上述方法实施例的各个实施过程和实现方式均可适用于该终端实施例中,且能达到相同的技术效果。具体地,图20为实现本申请实施例的一种终端的硬件结构示意图。This terminal embodiment corresponds to the above-mentioned method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 20 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
该终端2000包括但不限于:射频单元2001、网络模块2002、音频输出单元2003、输入单元2004、传感器2005、显示单元2006、用户输入单元2007、接口单元2008、存
储器2009以及处理器2010等中的至少部分部件。The terminal 2000 includes but is not limited to: radio frequency unit 2001, network module 2002, audio output unit 2003, input unit 2004, sensor 2005, display unit 2006, user input unit 2007, interface unit 2008, memory At least some components in the memory 2009 and the processor 2010 and so on.
本领域技术人员可以理解,终端2000还可以包括给各个部件供电的电源(比如电池),电源可以通过电源管理***与处理器2010逻辑相连,从而通过电源管理***实现管理充电、放电、以及功耗管理等功能。图20中示出的终端结构并不构成对终端的限定,终端可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置,在此不再赘述。Those skilled in the art can understand that the terminal 2000 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 2010 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in Figure 20 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.
应理解的是,本申请实施例中,输入单元2004可以包括图形处理单元(Graphics Processing Unit,GPU)20041和麦克风20042,图形处理器20041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。显示单元2006可包括显示面板20061,可以采用液晶显示器、有机发光二极管等形式来配置显示面板20061。用户输入单元2007包括触控面板20071以及其他输入设备20072中的至少一种。触控面板20071,也称为触摸屏。触控面板20071可包括触摸检测装置和触摸控制器两个部分。其他输入设备20072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆,在此不再赘述。It should be understood that in the embodiment of the present application, the input unit 2004 may include a graphics processing unit (Graphics Processing Unit, GPU) 20041 and a microphone 20042. The graphics processor 20041 is responsible for the operation of the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 2006 may include a display panel 20061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 2007 includes at least one of a touch panel 20071 and other input devices 20072. Touch panel 20071, also known as touch screen. The touch panel 20071 may include two parts: a touch detection device and a touch controller. Other input devices 20072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.
本申请实施例中,射频单元2001接收来自网络侧设备的下行数据后,可以传输给处理器2010进行处理;另外,射频单元2001可以向网络侧设备发送上行数据。通常,射频单元2001包括但不限于天线、放大器、收发信机、耦合器、低噪声放大器、双工器等。In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 2001 can transmit it to the processor 2010 for processing; in addition, the radio frequency unit 2001 can send uplink data to the network side device. Generally, the radio frequency unit 2001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.
存储器2009可用于存储软件程序或指令以及各种数据。存储器2009可主要包括存储程序或指令的第一存储区和存储数据的第二存储区,其中,第一存储区可存储操作***、至少一个功能所需的应用程序或指令(比如声音播放功能、图像播放功能等)等。此外,存储器2009可以包括易失性存储器或非易失性存储器,或者,存储器2009可以包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synch link DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DRRAM)。本申请实施例中的存储器2009包括但不限于这些和任意其它适合类型的存储器。Memory 2009 may be used to store software programs or instructions as well as various data. The memory 2009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 2009 may include volatile memory or nonvolatile memory, or memory 2009 may include both volatile and nonvolatile memory. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). The memory 2009 in the embodiment of the present application includes, but is not limited to, these and any other suitable types of memory.
处理器2010可包括一个或多个处理单元;可选地,处理器2010集成应用处理器和调制解调处理器,其中,应用处理器主要处理涉及操作***、用户界面和应用程序等的操作,调制解调处理器主要处理无线通信信号,如基带处理器。可以理解的是,上述调制解调处理器也可以不集成到处理器2010中。
The processor 2010 may include one or more processing units; optionally, the processor 2010 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 2010.
在本申请的一实施例中,发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号;In an embodiment of the present application, the sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal;
其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
可选地,射频单元2001,还用于发送所述第一主信号。Optionally, the radio frequency unit 2001 is also used to send the first main signal.
可选地,处理器2010用于获取所述主信号对应的时域信号;Optionally, the processor 2010 is configured to obtain the time domain signal corresponding to the main signal;
将所述时域信号划分为一个或多个调制块;dividing the time domain signal into one or more modulation blocks;
在所述时域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。K first reference signals are inserted into each modulation block corresponding to the time domain signal to obtain the first main signal.
可选地,处理器2010用于获取所述主信号对应的频域信号;Optionally, the processor 2010 is configured to obtain the frequency domain signal corresponding to the main signal;
将所述频域信号划分为一个或多个调制块;Divide the frequency domain signal into one or more modulation blocks;
在所述频域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。K first reference signals are inserted into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
可选地,每个所述调制块中的K个参考信号对应一个参考序列,或者,所述第一主信号中的K*M个参考信号对应一个参考序列。Optionally, K reference signals in each modulation block correspond to a reference sequence, or K*M reference signals in the first main signal correspond to a reference sequence.
可选地,射频单元2001,还用于在至少一组传输配置信息中,选取第一组传输配置信息,每组传输配置信息包括载波配置信息和与所述载波配置信息对应的天线配置信息;根据所述第一组传输配置信息,发送所述第一主信号。Optionally, the radio frequency unit 2001 is also configured to select a first group of transmission configuration information from at least one group of transmission configuration information, each group of transmission configuration information including carrier configuration information and antenna configuration information corresponding to the carrier configuration information; The first main signal is sent according to the first set of transmission configuration information.
可选地,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二单载波配置信息以及发送端设备的全向天线配置信息;Optionally, the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, second single carrier configuration information of the backscattering communication device, and all the information of the sending end device. configure information to the antenna;
或者,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二多载波配置信息以及发送端设备的波束赋形天线配置信息。Alternatively, the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
可选地,所述传输配置信息与以下至少一项关联:Optionally, the transmission configuration information is associated with at least one of the following:
业务QoS要求;Business QoS requirements;
反向散射通信设备能力;Backscatter communications equipment capabilities;
接收端设备能力;Receiver equipment capabilities;
发送端设备能力。Sender device capabilities.
可选地,处理器2010用于根据测量量汇报信息或信道变化信息,更新所述至少一组传输配置信息。Optionally, the processor 2010 is configured to update the at least one set of transmission configuration information according to measurement quantity reporting information or channel change information.
可选地,处理器2010用于根据L1信令、媒体接入控制单元MAC CE信令或无线资源控制RRC配置信息,确定N和K中的至少一项。Optionally, the processor 2010 is configured to determine at least one of N and K according to L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
可选地,所述K个第一参考信号位于所述调制块的前N个资源单元中,且每个所述第一参考信号对应一个资源单元。Optionally, the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
在本申请的一实施例中,射频单元2001用于接收第一主信号,所述第一主信号包括
M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;In an embodiment of the present application, the radio frequency unit 2001 is configured to receive a first main signal, where the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, K is a positive integer, N≥2, And M and N are positive integers;
处理器2010用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。The processor 2010 is configured to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
可选地,射频单元2001用于发送所述调制后的次信号。Optionally, the radio frequency unit 2001 is configured to send the modulated secondary signal.
可选地,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号。Optionally, the M secondary signals include one second reference signal, or two second reference signals with the same length and opposite phases.
可选地,所述第二参考信号对应的资源单元的数量与P个调制块对应的资源单元的数量相同,1≤P<M/2。Optionally, the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to the P modulation blocks, 1≤P<M/2.
可选地,所述第一主信号中的调制块为主信号的时域信号对应的调制块;Optionally, the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal;
可选地,处理器2010用于根据主信号的时域信号对应的调制块,对M个次信号进行调制,得到调制后的次信号。Optionally, the processor 2010 is configured to modulate the M secondary signals according to the modulation block corresponding to the time domain signal of the primary signal to obtain a modulated secondary signal.
可选地,所述第一主信号中的调制块为主信号的频域信号对应的调制块;Optionally, the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal;
可选地,处理器2010用于对主信号的频域信号对应的调制块进行离散傅里叶变换DFT处理,得到目标调制块;根据所述目标调制块对所述M个次信号进行调制,得到第一次信号;对所述第一次信号进行离散傅里叶逆变换IDFT处理,得到调制后的次信号。Optionally, the processor 2010 is configured to perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain a target modulation block; modulate the M secondary signals according to the target modulation block, Obtain the primary signal; perform inverse discrete Fourier transform (IDFT) processing on the primary signal to obtain the modulated secondary signal.
可选地,所述一个第二参考信号对应一个参考序列,或者,所述两个第二参考信号对应一个参考序列。Optionally, the one second reference signal corresponds to one reference sequence, or the two second reference signals correspond to one reference sequence.
在本申请的一实施例中,处理器2010用于获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。In an embodiment of the present application, the processor 2010 is configured to acquire a first main signal, and perform coherent demodulation and decoding on the first main signal according to a first reference signal in the first main signal, to obtain Data in the first main signal, the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is each modulation block The number of resource units included in the block, K is a positive integer, N≥2, and M and N are positive integers; obtain the symbiotic backscattering modulation block, and perform the symbiotic backscattering modulation block according to the first main signal. Coherent demodulation processing is used to obtain the data in the secondary signal, and M is a positive integer.
可选地,处理器2010还用于根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调,得到第一主信号估计值;通过信道解码器对所述第一主信号估计值进行比特解码处理,得到所述第一主信号中的数据。Optionally, the processor 2010 is further configured to coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate; use a channel decoder to The first main signal estimated value is subjected to bit decoding processing to obtain the data in the first main signal.
可选地,所述调制后的次信号是通过第一主信号对M个次信号进行调制得到的,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号;Optionally, the modulated secondary signal is obtained by modulating M secondary signals with the first main signal, and the M secondary signals include a second reference signal, or include a second reference signal with the same length and opposite phase. two second reference signals;
处理器2010还用于对所述第一主信号进行复制处理,得到复制后的主信号;通过复制后的主信号对所述共生反向散射调制块进行加权平均处理,得到处理后的共生反向散射调制块;根据所述处理后的共生反向散射调制块中的第二参考信号对所述处理后的共生反向散射调制块进行相干解调处理,得到次信号中的数据。The processor 2010 is also configured to perform copy processing on the first main signal to obtain a copied main signal; perform weighted average processing on the symbiotic backscatter modulation block through the copied main signal to obtain a processed symbiotic backscatter modulation block. a backscattering modulation block; performing coherent demodulation processing on the processed co-occurring back-scattering modulation block according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain data in the secondary signal.
本申请实施例中,发送端设备在主信号的每个调制块中***K个第一参考信号,得到第一主信号,使得接收端设备根据该第一参考信号能够简单有效地对该第一主信号进行相
干解调和解码处理,进而能够根据解调出的第一主信号的数据对次信号进行解调,从而实现了简单地解调出共生反向散射通信信号中的主信号和次信号的目的。In this embodiment of the present application, the sending end device inserts K first reference signals into each modulation block of the main signal to obtain the first main signal, so that the receiving end device can simply and effectively modify the first reference signal based on the first reference signal. main signal phase Dry demodulation and decoding processing can then demodulate the secondary signal based on the data of the demodulated first primary signal, thereby achieving the purpose of simply demodulating the primary signal and secondary signal in the symbiotic backscattering communication signal. .
本申请实施例还提供一种网络侧设备,包括处理器和通信接口,处理器用于对共生反向散射通信信号中的主信号进行调制,得到第一主信号;其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;Embodiments of the present application also provide a network side device, including a processor and a communication interface. The processor is used to modulate the main signal in the symbiotic backscattering communication signal to obtain a first main signal; wherein, the first main signal Includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, K is a positive integer, N≥2 , and M and N are positive integers;
或者,通信接口用于接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数,处理器用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号;Alternatively, the communication interface is used to receive a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks includes K first reference signals, 1≤K≤N, N is each The number of resource units included in the modulation block, K is a positive integer, N≥2, and M and N are positive integers. The processor is used to modulate M secondary signals according to the first main signal to obtain the modulated secondary signals. Signal;
或者,处理器用于获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;Alternatively, the processor is configured to acquire the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal. , the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers;
获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。Obtain the co-occurring backscattering modulation block, perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal, and obtain data in the secondary signal, and M is a positive integer.
该网络侧设备实施例与上述方法实施例对应,上述方法实施例的各个实施过程和实现方式均可适用于该网络侧设备实施例中,且能达到相同的技术效果。This network-side device embodiment corresponds to the above-mentioned method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.
具体地,本申请实施例还提供了一种网络侧设备。如图21所示,该网络侧设备2100包括:天线211、射频装置212、基带装置213、处理器214和存储器215。天线211与射频装置212连接。在上行方向上,射频装置212通过天线211接收信息,将接收的信息发送给基带装置213进行处理。在下行方向上,基带装置213对要发送的信息进行处理,并发送给射频装置212,射频装置212对收到的信息进行处理后经过天线211发送出去。Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 21, the network side device 2100 includes: an antenna 211, a radio frequency device 212, a baseband device 213, a processor 214 and a memory 215. The antenna 211 is connected to the radio frequency device 212 . In the uplink direction, the radio frequency device 212 receives information through the antenna 211 and sends the received information to the baseband device 213 for processing. In the downlink direction, the baseband device 213 processes the information to be sent and sends it to the radio frequency device 212. The radio frequency device 212 processes the received information and then sends it out through the antenna 211.
以上实施例中发送端设备或接收端设备执行的方法可以在基带装置213中实现,该基带装置213包括基带处理器。The method performed by the transmitting end device or the receiving end device in the above embodiments can be implemented in the baseband device 213, which includes a baseband processor.
基带装置213例如可以包括至少一个基带板,该基带板上设置有多个芯片,如图21所示,其中一个芯片例如为基带处理器,通过总线接口与存储器215连接,以调用存储器215中的程序,执行以上方法实施例中所示的发送端设备或接收端设备的操作。The baseband device 213 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. 21 . One of the chips is, for example, a baseband processor, which is connected to the memory 215 through a bus interface to call the memory 215 . The program executes the operations of the sending device or the receiving device shown in the above method embodiment.
该网络侧设备还可以包括网络接口216,该接口例如为通用公共无线接口(common public radio interface,CPRI)。The network side device may also include a network interface 216, which is, for example, a common public radio interface (CPRI).
具体地,本申请实施例的网络侧设备2100还包括:存储在存储器215上并可在处理器214上运行的指令或程序,处理器214调用存储器215中的指令或程序执行图16、17或18所示各模块执行的方法,并达到相同的技术效果,为避免重复,故不在此赘述。Specifically, the network side device 2100 in the embodiment of the present application also includes: instructions or programs stored in the memory 215 and executable on the processor 214. The processor 214 calls the instructions or programs in the memory 215 to execute the instructions shown in Figures 16, 17 or 18 shows the implementation method of each module and achieves the same technical effect. To avoid repetition, it will not be repeated here.
本申请实施例还提供一种可读存储介质,所述可读存储介质上存储有程序或指令,该程序或指令被处理器执行时实现上述信号处理方法实施例的各个过程,且能达到相同的技
术效果,为避免重复,这里不再赘述。Embodiments of the present application also provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above signal processing method embodiment is implemented and the same can be achieved. skills To avoid repetition, we will not go into details here.
其中,所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质,可以是非易失性的,也可以是非瞬态的。可读存储介质,可以包括计算机可读存储介质,如计算机只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等。Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium may be non-volatile or non-transient. Readable storage media may include computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks or optical disks.
本申请实施例另提供了一种芯片,所述芯片包括处理器和通信接口,所述通信接口和所述处理器耦合,所述处理器用于运行程序或指令,实现上述信号处理方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above signal processing method embodiments. Each process can achieve the same technical effect. To avoid duplication, it will not be described again here.
应理解,本申请实施例提到的芯片还可以称为***级芯片,***芯片,芯片***或片上***芯片等。It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
本申请实施例另提供了一种计算机程序/程序产品,所述计算机程序/程序产品被存储在存储介质中,所述计算机程序/程序产品被至少一个处理器执行以实现上述信号处理方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the above signal processing method embodiment. Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.
本申请实施例还提供了一种信号处理***,包括:发送端设备、反向散射通信设备及接收端设备,所述发送端设备可用于执行如上所述的发送端设备执行的信号处理方法的步骤,所述反向散射通信设备可用于执行如上所述的反向散射通信设备执行的信号处理方法的步骤,所述接收端设备可用于执行如上所述的接收端设备执行的信号处理方法的步骤,。Embodiments of the present application also provide a signal processing system, including: a transmitting end device, a backscattering communication device, and a receiving end device. The transmitting end device can be used to perform the signal processing method performed by the transmitting end device as described above. Steps, the backscatter communication device may be used to perform the steps of the signal processing method performed by the backscatter communication device as described above, and the receiving end device may be used to perform the signal processing method performed by the receiving end device as described above. step,.
需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。此外,需要指出的是,本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行功能,还可包括根据所涉及的功能按基本同时的方式或按相反的顺序来执行功能,例如,可以按不同于所描述的次序来执行所描述的方法,并且还可以添加、省去、或组合各种步骤。另外,参照某些示例所描述的特征可在其他示例中被组合。It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本申请的技术方案本质上或者说对相关技术做出贡献的部分可以以计算机软件产品的形式体现出来,该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中,包括若干指令用以使得一台终端(可以是手机,计算机,服务器,空调器,或者网络设备等)执行本申请各个实施例所述的方法。Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to related technologies. The computer software product is stored in a storage medium (such as ROM/RAM, disk, CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.
上面结合附图对本申请的实施例进行了描述,但是本申请并不局限于上述的具体实施方式,上述的具体实施方式仅仅是示意性的,而不是限制性的,本领域的普通技术人员在本申请的启示下,在不脱离本申请宗旨和权利要求所保护的范围情况下,还可做出很多形式,均属于本申请的保护之内。
The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.
Claims (32)
- 一种信号处理方法,包括:A signal processing method including:发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号;The sending end device modulates the main signal in the symbiotic backscattering communication signal to obtain the first main signal;其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
- 根据权利要求1所述的方法,其中,所述方法还包括:The method of claim 1, further comprising:所述发送端设备发送所述第一主信号。The sending end device sends the first main signal.
- 根据权利要求1所述的方法,其中,所述发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号,包括:The method according to claim 1, wherein the sending end device modulates the main signal in the symbiotic backscatter communication signal to obtain the first main signal, including:获取所述主信号对应的时域信号;Obtain the time domain signal corresponding to the main signal;将所述时域信号划分为一个或多个调制块;dividing the time domain signal into one or more modulation blocks;在所述时域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。K first reference signals are inserted into each modulation block corresponding to the time domain signal to obtain the first main signal.
- 根据权利要求1所述的方法,其中,所述发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号,包括:The method according to claim 1, wherein the sending end device modulates the main signal in the symbiotic backscatter communication signal to obtain the first main signal, including:获取所述主信号对应的频域信号;Obtain the frequency domain signal corresponding to the main signal;将所述频域信号划分为一个或多个调制块;Divide the frequency domain signal into one or more modulation blocks;在所述频域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。K first reference signals are inserted into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
- 根据权利要求1所述的方法,其中,每个所述调制块中的K个参考信号对应一个参考序列,或者,所述第一主信号中的K*M个参考信号对应一个参考序列。The method according to claim 1, wherein K reference signals in each modulation block correspond to a reference sequence, or K*M reference signals in the first main signal correspond to a reference sequence.
- 根据权利要求2所述的方法,其中,所述发送端设备发送所述第一主信号,包括:The method according to claim 2, wherein the sending end device sending the first main signal includes:在至少一组传输配置信息中,选取第一组传输配置信息,每组传输配置信息包括载波配置信息和与所述载波配置信息对应的天线配置信息;Select a first group of transmission configuration information from at least one group of transmission configuration information, each group of transmission configuration information including carrier configuration information and antenna configuration information corresponding to the carrier configuration information;根据所述第一组传输配置信息,发送所述第一主信号。The first main signal is sent according to the first set of transmission configuration information.
- 根据权利要求6所述的方法,其中,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二单载波配置信息以及发送端设备的全向天线配置信息;The method according to claim 6, wherein the first set of transmission configuration information includes: first single carrier configuration information or first multi-carrier configuration information of the sending end device, and second single carrier configuration of the backscatter communication device. information and the omnidirectional antenna configuration information of the sending device;或者,所述第一组传输配置信息包括:发送端设备的第一单载波配置信息或第一多载波配置信息、反向散射通信设备的第二多载波配置信息以及发送端设备的波束赋形天线配置信息。Alternatively, the first set of transmission configuration information includes: first single-carrier configuration information or first multi-carrier configuration information of the transmitting end device, second multi-carrier configuration information of the backscattering communication device, and beamforming of the transmitting end device. Antenna configuration information.
- 根据权利要求6所述的方法,其中,所述传输配置信息与以下至少一项关联:The method of claim 6, wherein the transmission configuration information is associated with at least one of the following:业务QoS要求;Business QoS requirements;反向散射通信设备能力;Backscatter communications equipment capabilities;接收端设备能力; Receiver equipment capabilities;发送端设备能力。Sender device capabilities.
- 根据权利要求6所述的方法,其中,所述方法还包括:The method of claim 6, further comprising:根据测量量汇报信息或信道变化信息,更新所述至少一组传输配置信息。The at least one set of transmission configuration information is updated according to the measurement quantity reporting information or the channel change information.
- 根据权利要求1所述的方法,其中,所述方法还包括:The method of claim 1, further comprising:根据L1信令、媒体接入控制单元MAC CE信令或无线资源控制RRC配置信息,确定N和K中的至少一项。At least one of N and K is determined according to L1 signaling, media access control unit MAC CE signaling or radio resource control RRC configuration information.
- 根据权利要求1所述的方法,其中,所述K个第一参考信号位于所述调制块的前N个资源单元中,且每个所述第一参考信号对应一个资源单元。The method according to claim 1, wherein the K first reference signals are located in the first N resource units of the modulation block, and each of the first reference signals corresponds to one resource unit.
- 一种信号处理方法,包括:A signal processing method including:反向散射通信设备接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The backscatter communication device receives a first main signal, the first main signal includes M modulation blocks, each of the modulation blocks includes K first reference signals, 1≤K≤N, N is each of the The number of resource units included in the modulation block, K is a positive integer, N≥2, and M and N are positive integers;所述反向散射通信设备根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。The backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals.
- 根据权利要求12所述的方法,其中,所述方法还包括:The method of claim 12, further comprising:所述反向散射通信设备发送所述调制后的次信号。The backscatter communication device transmits the modulated secondary signal.
- 根据权利要求12所述的方法,其中,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号。The method according to claim 12, wherein the M secondary signals include one second reference signal, or two second reference signals with the same length and opposite phases.
- 根据权利要求14所述的方法,其中,所述第二参考信号对应的资源单元的数量与P个调制块对应的资源单元的数量相同,1≤P<M/2。The method according to claim 14, wherein the number of resource units corresponding to the second reference signal is the same as the number of resource units corresponding to P modulation blocks, 1≤P<M/2.
- 根据权利要求12至15任一项所述的方法,其中,所述第一主信号中的调制块为主信号的时域信号对应的调制块;The method according to any one of claims 12 to 15, wherein the modulation block in the first main signal is a modulation block corresponding to the time domain signal of the main signal;所述反向散射通信设备根据所述第一主信号对M个次信号进行调制,得到调制后的次信号,包括:The backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:根据主信号的时域信号对应的调制块,对M个次信号进行调制,得到调制后的次信号。According to the modulation block corresponding to the time domain signal of the main signal, the M secondary signals are modulated to obtain modulated secondary signals.
- 根据权利要求12至15任一项所述的方法,其中,所述第一主信号中的调制块为主信号的频域信号对应的调制块;The method according to any one of claims 12 to 15, wherein the modulation block in the first main signal is a modulation block corresponding to the frequency domain signal of the main signal;所述反向散射通信设备根据所述第一主信号对M个次信号进行调制,得到调制后的次信号,包括:The backscatter communication device modulates M secondary signals according to the first main signal to obtain modulated secondary signals, including:对主信号的频域信号对应的调制块进行离散傅里叶变换DFT处理,得到目标调制块;Perform discrete Fourier transform DFT processing on the modulation block corresponding to the frequency domain signal of the main signal to obtain the target modulation block;根据所述目标调制块对所述M个次信号进行调制,得到第一次信号;Modulate the M secondary signals according to the target modulation block to obtain the primary signal;对所述第一次信号进行离散傅里叶逆变换IDFT处理,得到调制后的次信号。The primary signal is subjected to an inverse discrete Fourier transform (IDFT) process to obtain a modulated secondary signal.
- 根据权利要求14或15所述的方法,其中,所述一个第二参考信号对应一个参考序列,或者,所述两个第二参考信号对应一个参考序列。 The method according to claim 14 or 15, wherein the one second reference signal corresponds to a reference sequence, or the two second reference signals correspond to a reference sequence.
- 一种信号处理方法,包括:A signal processing method including:接收端设备获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The receiving end device acquires the first main signal, and performs coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the first main signal, so The first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block, and K is a positive Integers, N≥2, and M and N are positive integers;所述接收端设备获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。The receiving end device acquires the symbiotic backscatter modulation block, performs coherent demodulation processing on the symbiotic backscatter modulation block according to the first primary signal, and obtains data in the secondary signal, and M is a positive integer.
- 根据权利要求19所述的方法,其中,根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到主信号中的数据,包括:The method according to claim 19, wherein performing coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the data in the main signal includes:根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调,得到第一主信号估计值;Perform coherent demodulation on the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate;通过信道解码器对所述第一主信号估计值进行比特解码处理,得到所述第一主信号中的数据。A channel decoder performs bit decoding processing on the first main signal estimated value to obtain data in the first main signal.
- 根据权利要求19所述的方法,其中,所述调制后的次信号是通过第一主信号对M个次信号进行调制得到的,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号;The method according to claim 19, wherein the modulated secondary signal is obtained by modulating M secondary signals by a first main signal, and the M secondary signals include a second reference signal, or, Includes two second reference signals of the same length and opposite phases;根据所述第一主信号对所述调制后的次信号进行相干解调处理,得到次信号中的数据,包括:Perform coherent demodulation processing on the modulated secondary signal according to the first main signal to obtain data in the secondary signal, including:对所述第一主信号进行复制处理,得到复制后的主信号;Perform copy processing on the first main signal to obtain a copied main signal;通过复制后的主信号对所述共生反向散射调制块进行加权平均处理,得到处理后的共生反向散射调制块;Perform weighted average processing on the co-occurring backscattering modulation block by using the copied main signal to obtain a processed co-occurring backscattering modulation block;根据所述处理后的共生反向散射调制块中的第二参考信号对所述处理后的共生反向散射调制块进行相干解调处理,得到次信号中的数据。The processed co-occurring back-scattering modulation block is coherently demodulated according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain data in the secondary signal.
- 一种信号处理装置,应用于发送端设备,包括:A signal processing device, applied to sending end equipment, including:第一调制模块,用于发送端设备对共生反向散射通信信号中的主信号进行调制,得到第一主信号;The first modulation module is used for the sending end device to modulate the main signal in the symbiotic backscatter communication signal to obtain the first main signal;其中,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数。Wherein, the first main signal includes M modulation blocks, and each modulation block includes K first reference signals, 1≤K≤N, and N is the number of resource units included in each modulation block, K is a positive integer, N≥2, and M and N are positive integers.
- 根据权利要求22所述的装置,其中,所述装置还包括:The device of claim 22, wherein the device further comprises:第一发送模块,用于发送所述第一主信号。The first sending module is used to send the first main signal.
- 根据权利要求22所述的装置,其中,所述第一调制模块包括:The device of claim 22, wherein the first modulation module includes:第一获取子模块,用于获取所述主信号对应的时域信号;The first acquisition sub-module is used to acquire the time domain signal corresponding to the main signal;第一划分子模块,用于将所述时域信号划分为一个或多个调制块;A first dividing submodule, used to divide the time domain signal into one or more modulation blocks;第二获取子模块,用于在所述时域信号对应的每个调制块中***K个第一参考信号, 得到所述第一主信号。The second acquisition submodule is used to insert K first reference signals into each modulation block corresponding to the time domain signal, The first main signal is obtained.
- 根据权利要求22所述的装置,其中,所述第一调制模块包括:The device of claim 22, wherein the first modulation module includes:第三获取子模块,用于获取所述主信号对应的频域信号;The third acquisition sub-module is used to acquire the frequency domain signal corresponding to the main signal;第二划分子模块,用于将所述频域信号划分为一个或多个调制块;a second dividing submodule, used to divide the frequency domain signal into one or more modulation blocks;第四获取子模块,用于在所述频域信号对应的每个调制块中***K个第一参考信号,得到所述第一主信号。The fourth acquisition sub-module is used to insert K first reference signals into each modulation block corresponding to the frequency domain signal to obtain the first main signal.
- 一种信号处理装置,应用于反向散射通信设备,包括:A signal processing device used in backscatter communication equipment, including:第一接收模块,用于接收第一主信号,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The first receiving module is used to receive the first main signal. The first main signal includes M modulation blocks. Each of the modulation blocks includes K first reference signals, 1≤K≤N, and N is each The number of resource units included in the modulation block, K is a positive integer, N≥2, and M and N are positive integers;第二调制模块,用于根据所述第一主信号对M个次信号进行调制,得到调制后的次信号。The second modulation module is used to modulate M secondary signals according to the first main signal to obtain modulated secondary signals.
- 根据权利要求26所述的装置,其中,还包括:The device of claim 26, further comprising:第二发送模块,用于发送所述调制后的次信号。The second sending module is used to send the modulated secondary signal.
- 一种信号处理装置,应用于接收端设备,包括:A signal processing device, applied to receiving end equipment, including:第一处理模块,用于获取第一主信号,并根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调和解码处理,得到所述第一主信号中的数据,所述第一主信号包括M个调制块,每个所述调制块中包括K个第一参考信号,1≤K≤N,N为每个所述调制块包含的资源单元的数量,K为正整数,N≥2,且M和N为正整数;The first processing module is used to obtain the first main signal, and perform coherent demodulation and decoding processing on the first main signal according to the first reference signal in the first main signal to obtain the first main signal. data, the first main signal includes M modulation blocks, each modulation block includes K first reference signals, 1≤K≤N, N is the number of resource units included in each modulation block. , K is a positive integer, N≥2, and M and N are positive integers;第二处理模块,用于获取共生反向散射调制块,根据所述第一主信号对所述共生反向散射调制块进行相干解调处理,得到次信号中的数据,且M为正整数。The second processing module is used to obtain the co-occurring backscattering modulation block, perform coherent demodulation processing on the co-occurring backscattering modulation block according to the first main signal, and obtain data in the secondary signal, and M is a positive integer.
- 根据权利要求28所述的装置,其中,所述第一处理模块包括:The device of claim 28, wherein the first processing module includes:第一解调子模块,用于根据所述第一主信号中的第一参考信号对所述第一主信号进行相干解调,得到第一主信号估计值;A first demodulation submodule, configured to coherently demodulate the first main signal according to the first reference signal in the first main signal to obtain a first main signal estimate;第一解码子模块,用于通过信道解码器对所述第一主信号估计值进行比特解码处理,得到所述第一主信号中的数据。The first decoding submodule is configured to perform bit decoding processing on the first main signal estimated value through a channel decoder to obtain data in the first main signal.
- 根据权利要求28所述的装置,其中,所述调制后的次信号是通过第一主信号对M个次信号进行调制得到的,所述M个次信号中包括一个第二参考信号,或者,包括长度相同且相位相反的两个第二参考信号;The device according to claim 28, wherein the modulated secondary signal is obtained by modulating M secondary signals by a first main signal, and the M secondary signals include a second reference signal, or, Includes two second reference signals of the same length and opposite phases;所述第二处理模块包括:The second processing module includes:第一处理子模块,用于对所述第一主信号进行复制处理,得到复制后的主信号;The first processing sub-module is used to perform copy processing on the first main signal to obtain the copied main signal;第二处理子模块,用于通过复制后的主信号对所述共生反向散射调制块进行加权平均处理,得到处理后的共生反向散射调制块;The second processing submodule is used to perform weighted average processing on the symbiotic backscattering modulation block through the copied main signal to obtain the processed symbiotic backscattering modulation block;第三处理子模块,用于根据所述处理后的共生反向散射调制块中的第二参考信号对所述处理后的共生反向散射调制块进行相干解调处理,得到次信号中的数据。 The third processing sub-module is used to perform coherent demodulation processing on the processed co-occurring back-scattering modulation block according to the second reference signal in the processed co-occurring back-scattering modulation block to obtain the data in the secondary signal. .
- 一种通信设备,包括处理器和存储器,所述存储器存储可在所述处理器上运行的程序或指令,所述程序或指令被所述处理器执行时实现如权利要求1至11任一项所述的信号处理方法的步骤,或者,实现如权利要求12至18任一项所述的信号处理方法的步骤,或者,实现如权利要求19至21任一项所述的信号处理方法的步骤。A communication device, including a processor and a memory, the memory stores a program or instructions that can be run on the processor, and when the program or instructions are executed by the processor, any one of claims 1 to 11 is implemented. The steps of the signal processing method, or the steps of implementing the signal processing method as described in any one of claims 12 to 18, or the steps of implementing the signal processing method as described in any one of claims 19 to 21 .
- 一种可读存储介质,所述可读存储介质上存储程序或指令,所述程序或指令被处理器执行时实现如权利要求1至11任一项所述的信号处理方法的步骤,或者,实现如权利要求12至18任一项所述的信号处理方法的步骤,或者,实现如权利要求19至21任一项所述的信号处理方法的步骤。 A readable storage medium storing programs or instructions on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the signal processing method according to any one of claims 1 to 11 are implemented, or, The steps of implementing the signal processing method according to any one of claims 12 to 18, or the steps of implementing the signal processing method according to any one of claims 19 to 21.
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