CN113746522A - 5G repeater signal processing method - Google Patents
5G repeater signal processing method Download PDFInfo
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- CN113746522A CN113746522A CN202110823005.4A CN202110823005A CN113746522A CN 113746522 A CN113746522 A CN 113746522A CN 202110823005 A CN202110823005 A CN 202110823005A CN 113746522 A CN113746522 A CN 113746522A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15564—Relay station antennae loop interference reduction
- H04B7/15571—Relay station antennae loop interference reduction by signal isolation, e.g. isolation by frequency or by antenna pattern, or by polarization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15535—Control of relay amplifier gain
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a 5G repeater signal processing method, a forward antenna receives a 5G downlink radio frequency signal, a synchronous circuit is electrified to search a cell, and a 5G downlink control signal and a 5G uplink control signal are output at intervals; the 5G downlink control signal controls the radio frequency switch to control the conduction and the closing of the downlink and the uplink, the same frequency interference is prevented through cavity separation, and the 5G radio frequency signal is transmitted through low amplification, loop saturation suppression and filtering in sequence. The invention directly amplifies the 5G radio frequency signal without up-down frequency conversion; the repeater cavities are arranged, so that the repeater is suitable for direct amplification processing of mobile, telecommunication and different 5G frequency bands; the uplink and downlink circuits are controlled to be switched on and off through a synchronous circuit, and an automatic gain control system is arranged, so that loop saturation is effectively prevented, and same frequency interference is prevented; and a network management system is arranged, so that the management of a plurality of repeaters is facilitated, and the output power is adjusted.
Description
Technical Field
The invention relates to the technical field of wireless communication networks, in particular to a 5G repeater signal processing method.
Background
The higher the frequency of the 5G signal is, the weaker the diffraction capability of the radio wave is, the larger link loss problem is faced when the 5G macro base station signal deployed in a high frequency band passes through the wall indoors, and the indoor deep coverage is limited. Because the 5G network adopts the millimeter wave technology, it is an electromagnetic wave with weak penetration and capable of being attenuated rapidly, which determines that its anti-interference capability is weak and the signal penetration of 5G is poor, so the signal coverage of a common 5G base station is only 200 meters in general. Therefore, a repeater is needed to make up for the insufficient coverage of the 5G signal, expand the coverage of the base station, fill the coverage busy, reduce the cost of network coverage and promote the development of 5G.
In the existing repeater technology, a forward antenna is used for receiving a downlink signal of a base station into a repeater, a low-noise amplifier is used for amplifying a useful signal, the useful signal is converted into an intermediate-frequency signal through down conversion, the intermediate-frequency signal is converted into a radio frequency through up conversion, the radio frequency signal is amplified through a power amplifier, and the radio frequency signal is transmitted to a mobile station through a backward antenna, namely the radio frequency signal is transmitted to the base station through the low-noise amplifier, a down converter, a filter, a middle amplifier, an up converter and the power amplifier, so that the two-way communication between the base station and the mobile station is realized. The prior art has relatively complex circuit, relatively complex working principle and high production and manufacturing cost.
Disclosure of Invention
The invention provides a 5G repeater signal processing method for solving the problems of relatively complex circuit and working principle and high production and manufacturing cost of the existing repeater, which directly amplifies a 5G radio frequency signal without up-down frequency conversion and directly performs radio frequency signal direct amplification processing; the repeater cavities are arranged, so that the repeater is suitable for direct amplification processing of mobile, telecommunication and different 5G frequency bands; the uplink and downlink circuits are controlled to be switched on and off through a synchronous circuit, and an automatic gain control system is arranged, so that loop saturation is effectively prevented, and same frequency interference is prevented; the network management system is arranged, so that management of a plurality of repeaters is facilitated, the output power is adjusted, and the system is suitable for large-scale generation to solve the problem of a blind area of a 5G signal of an office building, an underground large-area parking lot and a complex underground passage.
The invention provides a 5G repeater signal processing method, which comprises the following steps: the method comprises the following steps:
s1, the forward antenna 1 receives the downlink rf signal: the method comprises the steps that a forward antenna receives a 5G downlink radio frequency signal and transmits the 5G downlink radio frequency signal to a downlink receiver for receiving, the 5G downlink radio frequency signal is transmitted to a synchronization circuit after being filtered and coupled, the synchronization circuit is electrified for cell search, a PSS and a SSS are searched firstly, a cell group ID is obtained, then time and frequency synchronization is obtained, MIB and SIB information are read, the uplink-downlink time slot ratio of TDDH is obtained in the SIB information, and a 5G downlink control signal and a 5G uplink control signal are output at intervals;
s2, downlink conduction: the 5G downlink control signal controls the radio frequency switch to conduct the downlink, at the moment, the uplink is closed, the 5G downlink radio frequency signal is transmitted to the rear antenna after sequentially passing through the conducted radio frequency switch, low-noise amplification, drive amplification, loop saturation suppression, power amplification and filtering again after passing through the next conducted radio frequency switch, and the downlink is isolated by sub-cavities to prevent same-frequency interference;
s3, uplink on: the control signal of the 5G uplink controls the radio frequency switch to conduct the uplink, at the moment, the downlink is closed, the backward antenna receives a 5G uplink radio frequency signal and transmits the 5G uplink radio frequency signal to the uplink receiver for receiving, the 5G uplink radio frequency signal sequentially passes through the conducted radio frequency switch, the low noise amplification, the driving amplification, the suppression loop saturation and the power amplification, and is filtered again after passing through the next conducted radio frequency switch and then is transmitted by the forward antenna, and the uplink prevents the same frequency interference through cavity separation;
returning to step S1, the 5G signal processing is continued until the 5G signal processing is all completed.
In the preferred mode of the signal processing method for the 5G repeater, in step S1, the synchronization circuit comprises a radio frequency channel and an FPGA, wherein the radio frequency channel is used for receiving a 5G downlink radio frequency signal, and the FPGA is used for searching a cell and outputting a 5G downlink control signal and a 5G uplink control signal at intervals.
In a preferred embodiment of the method for processing a 5G repeater signal according to the present invention, in steps S2 and S3, the device for suppressing loop saturation is a circulator, a limiter, or an automatic gain control system.
The invention relates to a signal processing method of a 5G repeater, which is a preferable mode,
the automatic gain control system comprises a linear variable gain amplifier, a coupler and an AGC;
the linear variable GAIN amplifier is used for power amplification, the second coupler is used for coupling and outputting to the AGC, the AGC is used for adjusting the GAIN voltage of the linear variable GAIN amplifier, the correct balance between the input signal level of the AGC and the set value voltage is achieved, and the linear variable GAIN amplifier outputs a fixed power radio frequency signal.
In the method for processing the 5G repeater signal, as a preferred mode, in step S2, the 5G downlink radio frequency signal is further coupled and output to a network management system through a coupler;
in step S3, the 5G uplink rf signal is further coupled and output to the network management system via the coupler;
further comprising step S4:
s4, monitoring by the network management system: the network management system monitors and adjusts the states of signals, circuits and power supplies;
s41, signal monitoring and adjusting: the network management system receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, performs signal state detection, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the signal state; when the computer or the mobile phone APP sends out a command for adjusting the signal state, the network management system adjusts the output power through the electrically connected linear variable gain amplifier;
s42, circuit monitoring and adjusting: the network management system receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, detects the circuit state, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the circuit state;
s43, monitoring and adjusting power supply state: the network management system detects the power state, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the power state; when the computer or the mobile phone APP sends out a repeater dormancy or shutdown instruction, the network management system controls the repeater dormancy or shutdown.
The invention relates to a signal processing method of a 5G repeater, which is a preferable mode,
s1, the forward antenna 1 receives the downlink rf signal: the method comprises the steps that a forward antenna receives a 5G downlink radio frequency signal and transmits the 5G downlink radio frequency signal to a downlink receiver, the 5G downlink radio frequency signal is transmitted to a synchronizing circuit after being coupled, the synchronizing circuit is electrified to search a cell, PSS and SSS are searched firstly to obtain a cell group ID, then time and frequency synchronization is obtained, MIB and SIB information are read, the uplink-downlink time slot ratio of TDDH is obtained in the SIB information, a 5G downlink control signal and a 5G uplink control signal are output at intervals, when the 5G downlink control signal controls the conduction of a downlink in a corresponding frequency range, the step S2 is carried out, and when the 5G uplink control signal controls the conduction of an uplink in a corresponding frequency range, the step S3 is carried out;
s2, downlink conduction: the 5G downlink control signal controls the radio frequency switch to conduct the downlink in the corresponding frequency range, at the moment, the uplink and the downlink in other frequency ranges are closed, the 5G downlink radio frequency signal passes through the first multiplexer and then is output to the downlink in the corresponding frequency range, the 5G downlink radio frequency signal sequentially passes through the conducted radio frequency switch, the low-noise amplification, the driving amplification, the loop saturation suppression and the power amplification, and then is filtered again after passing through the next conducted radio frequency switch, and then is transmitted to the antenna after passing through the second multiplexer, and the downlink is isolated by separating cavities to prevent the same frequency interference;
s3, uplink on: the 5G uplink control signal controls the radio frequency switch to conduct the uplink in a corresponding frequency range, at the moment, the downlink and the uplink in other frequency ranges are closed, the 5G uplink radio frequency signal received by the backward antenna is sent to the uplink receiver for receiving, the 5G uplink radio frequency signal is output to the downlink in the corresponding frequency range after passing through the first multiplexer, sequentially passes through the conducted radio frequency switch, the low noise amplification, the driving amplification, the loop saturation suppression, the power amplification, the secondary filtering after passing through the next conducted radio frequency switch, and is transmitted by the forward antenna after passing through the second multiplexer, and the uplink is isolated by the cavity to prevent the same frequency interference; returning to step S1, the signal processing is continued until the 5G signal processing is completely completed.
The invention relates to a signal processing method of a 5G repeater, which is a preferable mode,
in step S1, the 5G uplink control signal frequency range includes: a 2515MHz-2675MHz frequency band, a 3400MHz-3500MHz frequency band and a 3500MHz-3600MHz frequency band;
in step S2, the first multiplexer and the second multiplexer are triplexers, and the downlink includes three, which correspond to the 2515MHz-2675MHz frequency band, the 3400MHz-3500MHz frequency band, and the 3500MHz-3600MHz frequency band, respectively;
in step S3, the first multiplexer and the second multiplexer are triplexers, and the uplink includes three multiplexers corresponding to the 2515MHz-2675MHz frequency band, the 3400MHz-3500MHz frequency band, and the 3500MHz-3600MHz frequency band, respectively.
In the method for processing the 5G repeater signal, as a preferred mode, in step S2, a 5G downlink radio frequency signal is coupled and output to a network management system through a coupler;
in step S3, the 5G uplink rf signal is coupled and output to the network management system via the coupler;
further comprising step S4:
s4, monitoring by the network management system: the network management system monitors and adjusts the states of signals, circuits and power supplies;
s41, signal monitoring and adjusting: the network management system receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, performs signal state detection, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the signal state; when the computer or the mobile phone APP sends out a command for adjusting the signal state, the network management system adjusts the output power through the electrically connected linear variable gain amplifier;
s42, circuit monitoring and adjusting: the network management system receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, detects the circuit state, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the circuit state;
s43, monitoring and adjusting power supply state: the network management system detects the power state, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the power state; when the computer or the mobile phone APP sends out a repeater dormancy or shutdown instruction, the network management system controls the repeater dormancy or shutdown.
In the method for processing the 5G repeater signal, as a preferred mode, in the step S1, the radio frequency switch is a cascaded multi-stage switch;
the cavity isolation in the steps S2 and S3 is as follows: the low-noise amplifying device and the driving amplifying device are arranged in the same cavity, the device for inhibiting loop saturation and the power amplifying device are arranged in the same cavity, and the filtering device and the radio frequency switch are arranged in the same cavity or are not separated.
In the method for processing a 5G repeater signal, as a preferred mode, in step S1, a 5G downlink control signal is a downlink time slot high level, and a 5G uplink control signal is an uplink time slot high level;
after transmitting 5G downlink radio frequency signals to the antenna, the 2us synchronization circuit stops outputting 5G downlink control signals, and after delaying 3us, the synchronization circuit outputs 5G uplink control signals
Physical Cell Identities (PCIs) are used to distinguish different cells. The PSS is called Primary Synchronization Signal, i.e., Primary Synchronization Signal, for transmitting Intra-group ID, i.e., N (2) _ ID value. The SSS is collectively referred to as a Secondary Synchronization Signal, i.e., a Secondary Synchronization Signal, used to transmit a group ID, i.e., an N (1) _ ID value.
The system information is cell-level information, i.e., effective for all UEs accessing the cell. The system information may be divided into mib (masterinformation block) and sib (systemlnformaticblock), and each system information includes a series of parameter sets related to a certain function.
LNA (Low Noise Amplifier). Since the signal-to-noise ratio in the receiving circuit is usually very low, and the signal is often much smaller than the noise, the signal and the noise are amplified together when passing through the amplifier, which is very unfavorable for the subsequent processing, and thus the amplifier is required to suppress the noise. The LNA is used in the receiver because of the strict requirements on noise and therefore has a low bias, which enables a small NF and a high efficiency.
The main function of a PA (Power Amplifier) is Power amplification to meet the system requirements, and the most important indexes are output Power, and how linear the PA is, etc., which are generally used in the last stage of a transmitter. In the mobile phone, the PA is added between an antenna switch and a transceiver at the transmitting end of the main pole antenna; the LNA is added between an antenna switch and a transceiver at the receiving end of the main pole antenna, or between an antenna switch and a transceiver of the auxiliary pole antenna, or between the GPS antenna and the GPS.
The 5GNR is a global 5G standard based on a completely new air interface design of OFDM, and is also a very important cellular mobile technology foundation for the next generation. 5GNR prototype system and test platform under 5GHz, which are introduced by high-pass in 8 months of 2015, are very important steps for driving 5G to business. The 5GHz band is the key to achieving good coverage based on 5G, and the high-pass applies a lot of technologies on the prototype system.
5G mobile networks like earlier 2G, 3G and 5G mobile networks, 5G networks are digital cellular networks in which the service area covered by a provider is divided into a number of small geographical areas called cells. Analog signals representing sound and images are digitized in the handset, converted by an analog-to-digital converter and transmitted as a bit stream. All 5G wireless devices in a cell communicate by radio waves with local antenna arrays and low power autonomous transceivers (transmitters and receivers) in the cell. The transceiver allocates frequency channels from a common pool of frequencies that are reusable in geographically separated cells. The local antenna is connected to the telephone network and the internet through a high bandwidth fiber or wireless backhaul connection. As with existing handsets, when a user passes from one cell to another, their mobile device will automatically "switch" to the antenna in the new cell.
The main advantage of 5G networks is that the data transmission rate is much higher than previous cellular networks, up to 8Gbit/s, faster than current wired internet, 80 times faster than previous 5G LTE cellular networks. Another advantage is lower network delay (faster response time), below 1 millisecond, and 30-60 milliseconds for 5G. Due to faster data transmission, the 5G network will not only serve the handset, but will also become a general home and office network provider, competing with the cable network provider. Previous cellular networks provided low data rate internet access suitable for cell phones, but a cell phone tower could not economically provide sufficient bandwidth as a general internet provider for home computers.
A Limiter (Limiter) is a circuit capable of smoothing the amplitude of a signal voltage within a limited range, and is also called a clipper. The effect of the clipping circuit is to limit the amplitude of the output signal within a certain range, i.e. when the input voltage exceeds or falls below a certain reference value, the output voltage will be limited to a certain level (called clipping level) and will no longer vary with the input voltage.
transceiver, radio transceiver: radio transmitters and receivers, mounted on a single unit and sharing a portion of the same circuitry, are typically portable or mobile in use.
5G synchronous circuit principle:
the 5G RF front end comprises circuits such as filtering, low-noise amplification and the like, the Transceiver circuit supports multi-radio frequency N41\ N77N78 frequency band processing, and the baseband processing part resolves and outputs uplink and downlink time slots through an FPGA (DSP). And the serial port is configured with a 5G NR system, a frequency band, cell information configuration and the like. And meanwhile, frequency band and cell information can be read. Band lock and out of lock indication level indications (high).
After the synchronization circuit is powered on, cell search is carried out, the PSS and the SSS are searched first, the cell group ID is obtained, and then more accurate time and frequency synchronization is carried out. And reading the MIB and the SIB information, and obtaining the uplink-downlink time slot ratio of the TDDH in the SIB information.
The uplink and downlink time slot format is as follows: D/S/U/D/D.
The uplink and downlink time slots of the 5G NR are richer than the format of the 4G. The repeater can normally work only by providing accurate uplink and downlink synchronous timing. One radio frame 10ms of the 5G NR consists of two fields, each field being 5ms in length. The first half frame is 5ms long and comprises sub-frames #0 to #4, and the second half frame is 5ms long and comprises sub-frames #5 to # 9. The structure is fixed.
The subcarrier spacing of the 5G NR can be flexibly configured, and can be configured to be 2 mu x 15KHz, and the range is 15KHz to 240 KHz.
The problem that simultaneous opening is required to be avoided at the switching point of LNA and PA switches of the repeater, the actual air interface distance between a synchronization circuit and a base station is uncertain, and the processing of uplink and downlink switching points is as follows: after 2us of ending the downlink, closing the downlink time slot instruction, and delaying for 3us to open the uplink time slot instruction; at the transition point from the end of the uplink time slot to the start of the downlink time slot, the uplink time slot indication is firstly closed, and then the downlink time slot indication is delayed to be opened by 3 us.
The AGC working principle is as follows:
operating a linear variable gain amplifier in the AGC loop, samples of the output radio frequency must be fed back to a detector (usually using a directional coupler and additional attenuation). When VOUT is connected to the GAIN pin, a set point voltage is applied to the VSET input of the detector. Based on the defined linear dB value, which is the detector VSET relative to the RF input signal, the detector adjusts the GAIN voltage (the output VOUT of the detector is an error amplifier output) until the horizontal RF input corresponds to the applied setpoint Voltage (VSET). The gain setting brings the detector input signal level and the setting voltage to the correct balance.
Forward antenna (receiving) downlink transceiver. Receiving radio frequency signals, sending the radio frequency signals to a synchronous circuit through a coupler and a coupling end, searching cells, resolving uplink and downlink time slots, and outputting a time slot level to control a radio frequency switch; the radio frequency signal is transmitted to the repeater sub-cavity corresponding to the received radio frequency signal after passing through the multiplexer. The direct connection end passes through a downlink radio frequency switch, a downlink time slot level opens the downlink radio frequency switch, a downlink low noise amplifier, a drive amplifier, an AGC, a variable gain power amplifier (a power amplifier and a variable attenuator), a coupler, a radio frequency switch, a filter and a multiplexer are used for isolating, then the downlink radio frequency switch is down to a backward antenna (transmitting), and an uplink radio frequency switch is closed; backward antenna (receive) uplink. The received radio frequency signal is transmitted to a filter through a multiplexer, an uplink time slot level starts a radio frequency switch, and is switched on through an uplink low noise amplifier, a driving amplifier, AGC, a variable gain power amplifier (a power amplifier and a variable attenuator) and a coupler through the radio frequency switch, and a downlink radio frequency switch is switched off and is also switched on through the filter, the multiplexer and the coupler to be uplink to a forward antenna (transmitting). The AGC can protect the loop from saturation. And simultaneously, enabling the downlink and the uplink to output fixed power.
The network management system comprises a circuit state detection and control system, adopts a Micro Control Unit (MCU) for control, and comprises an analog-digital converter.
The network management system is used for detecting the working state of the power supply system, detecting whether the repeater is in synchronous state with the base station, detecting the frequency point and the signal intensity, detecting the working temperature and automatically starting the heat dissipation system.
And the upper and lower power acquisition systems respectively acquire the uplink and downlink power of N41/N77/N78/N79 and convert the uplink and downlink power into the processors of the MCU in an AD mode. The MCU calculates and arranges the data, and transmits the data through the Bluetooth module, the WIFI module and the Ethernet module; the power supply detection system collects working voltage and current, delivers the working voltage and current to the MCU for power consumption calculation, and detects the working dynamics of the power supply. A temperature control system. And the temperature of the working environment of the system is acquired by the temperature sensor and is delivered to the MCU for management.
The detection state data is connected with a computer or a mobile phone APP through wifi, Bluetooth and a network port, and the working state of the product can be remotely detected and managed. Including temperature, power state, signal power, frequency points. The upstream and downstream power can be adjusted by the APP (or computer), and the heat dissipation system can be manually or automatically controlled. The host of the repeater is controlled to be dormant or shut down, and the mobile, communication and telecommunication channels are controlled (closed and opened), so that the effects of energy conservation and emission reduction are achieved.
The repeater has the following dynamic range: -90-30 dBm, suitable for n41\ n77\ n78\79 or other TDD systems, the isolation is greater than 170dB, and the output is maximum and fixed 23 dBm. The output power can be increased by adding circulators or rf switches in the forward and backward directions to increase the loop isolation.
The application comprises the following steps: 5G signal coverage for complex environments. Office buildings, underground large-area parking lots and complex underground passages.
The invention has the following advantages:
(1) the uplink and downlink do not use frequency conversion technology, but directly amplify the 5G signals; multiple repeater cavities are connected in parallel, and mobile, telecommunication and connected signals are processed respectively; the TDD is processed by using an independent synchronous circuit, and the logical isolation of the uplink and downlink communication multi-radio frequency switch combination is high; by the cavity separation, the isolation degree is effectively improved, and the same frequency interference is prevented;
(2) by setting a loop saturation system, the problem of loop coupling between amplifiers is solved, and same frequency interference is prevented; the AGC post-stage increases the gain, and can increase the output power, and simultaneously, the downlink and the uplink output fixed power.
(3) The network management system is arranged, so that the working state of the repeater can be remotely monitored, the output power can be adjusted, and the dormancy or shutdown can be set.
(4) The working voltage is 5.5V, the device is suitable for n41\ n77\ n78\ n79 frequency bands of 5G, and is suitable for radio frequency front ends of 5G repeater stations and micropower stations with various powers.
Drawings
FIG. 1 is a flow chart of embodiment 1 of a method for processing a 5G repeater signal;
FIG. 2 is a flowchart of embodiment 2 of a method for processing a 5G repeater signal.
Reference numerals:
1. a forward antenna; 2. a synchronization circuit; 21. a radio frequency channel; 22. an FPGA; 3. a backward antenna; 4. an automatic gain control system; 41. a linear variable gain amplifier; 42. a coupler; 43. AGC; 5. a network management system; 6. a first multiplexer; 7. a second multiplexer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1, a method for processing a 5G repeater is characterized in that: the method comprises the following steps:
s1, the forward antenna 1 receives the downlink rf signal: the method comprises the steps that a forward antenna 1 receives a 5G downlink radio frequency signal and transmits the 5G downlink radio frequency signal to a downlink receiver for receiving, the 5G downlink radio frequency signal is transmitted to a synchronous circuit 2 after being filtered and coupled, the synchronous circuit 2 is electrified for cell search, a PSS and a SSS are searched firstly, a cell group ID is obtained, then time and frequency synchronization is obtained, MIB and SIB information are read, the uplink-downlink time slot ratio of TDDH is obtained in the SIB information, and a 5G downlink control signal and a 5G uplink control signal are output at intervals;
s2, downlink conduction: the 5G downlink control signal controls the radio frequency switch to conduct the downlink, at the moment, the uplink is closed, the 5G downlink radio frequency signal is transmitted to the rear antenna 3 after sequentially passing through the conducted radio frequency switch, low-noise amplification, drive amplification, loop saturation suppression, power amplification and filtering again after passing through the next conducted radio frequency switch, and the downlink is isolated by sub-cavities to prevent same-frequency interference;
s3, uplink on: the control signal of the 5G up link controls the radio frequency switch to conduct the up link, at the moment, the down link is closed, the backward antenna 3 receives the 5G up radio frequency signal and transmits the 5G up radio frequency signal to the up receiver to be received, the 5G up radio frequency signal sequentially passes through the conducted radio frequency switch, the low noise amplification, the driving amplification, the suppression loop saturation and the power amplification, and the filtering is carried out again after passing through the next conducted radio frequency switch and then is transmitted by the forward antenna 1, and the up link is isolated by separating cavities to prevent the same frequency interference;
returning to step S1, the 5G signal processing is continued until the 5G signal processing is all completed.
Example 2
As shown in fig. 2, a method for processing a 5G repeater is characterized in that: the method comprises the following steps:
s1, the forward antenna 1 receives the downlink rf signal: the method comprises the steps that a forward antenna 1 receives 5G downlink radio frequency signals, the 5G downlink radio frequency signals are received by a downlink receiver, the 5G downlink radio frequency signals are transmitted to a synchronization circuit 2 after being filtered and coupled, the synchronization circuit 2 comprises a radio frequency channel 21 and an FPGA22, the radio frequency channel 21 is used for receiving the 5G downlink radio frequency signals, the FPGA22 is used for searching cells, PSS and SSS are searched firstly, a cell group ID is obtained, time and frequency synchronization is obtained, MIB and SIB information are read, the uplink-downlink time slot ratio of TDDH is obtained in the SIB information, and 5G downlink control signals and 5G uplink control signals are output at intervals; the 5G downlink control signal is a downlink time slot high level, and the 5G uplink control signal is an uplink time slot high level;
after transmitting a 5G downlink radio frequency signal to the antenna 3, the 2us synchronization circuit 2 stops outputting the 5G downlink control signal, and then the 3us delay synchronization circuit 2 outputs a 5G uplink control signal;
the 5G uplink control signal frequency range includes: a 2515MHz-2675MHz frequency band, a 3400MHz-3500MHz frequency band and a 3500MHz-3600MHz frequency band; the radio frequency switch is a cascaded multi-stage switch;
the network management system monitors and enters step S4;
s2, downlink conduction: the 5G downlink control signal controls the radio frequency switch to conduct the downlink in the corresponding frequency range, at the moment, the uplink and the downlink in other frequency ranges are closed, the 5G downlink radio frequency signal passes through the first multiplexer 6 and then is output to the downlink in the corresponding frequency range, sequentially passes through the conducted radio frequency switch, the low noise amplification, the driving amplification, the loop saturation suppression and the power amplification, passes through the next conducted radio frequency switch and then is filtered again, passes through the second multiplexer 7 and is transmitted to the antenna 3, and the downlink is isolated by separating cavities to prevent the same frequency interference;
the device for inhibiting the loop saturation is a circulator or a limiter or an automatic gain control system 4; the automatic gain control system 4 includes a linear variable gain amplifier 41, a coupler 42, and an AGC 43; the linear variable GAIN amplifier 41 is used for power amplification, the second coupler 42 is used for coupling and outputting to the AGC43, the AGC43 is used for adjusting the GAIN voltage of the linear variable GAIN amplifier 41, the correct balance between the input signal level of the AGC43 and the set value voltage is achieved, and the linear variable GAIN amplifier 41 outputs a fixed power radio frequency signal;
the 5G downlink radio frequency signal is also coupled and output to the network management system 5 through the coupler; the first multiplexer 6 and the second multiplexer 7 are triplexers, and the downlink comprises three multiplexers, which respectively correspond to a 2515MHz-2675MHz frequency band, a 3400MHz-3500MHz frequency band and a 3500MHz-3600MHz frequency band;
the separated cavities are isolated as follows: the low-noise amplifying device and the driving amplifying device are arranged in the same cavity, the device for inhibiting loop saturation and the power amplifying device are arranged in the same cavity, and the filtering device and the radio frequency switch are arranged in the same cavity or are not separated.
S3, uplink on: the 5G uplink control signal controls the radio frequency switch to conduct the uplink in the corresponding frequency range, at the moment, the downlink and the uplink in other frequency ranges are closed, the 5G uplink radio frequency signal received by the backward antenna 3 is sent to the uplink receiver for receiving, the 5G uplink radio frequency signal is output to the downlink in the corresponding frequency range after passing through the first multiplexer 6, sequentially passes through the conducted radio frequency switch, the low noise amplification, the driving amplification, the suppression of loop saturation, the power amplification, the secondary filtering after passing through the next conducted radio frequency switch, and is transmitted by the forward antenna 1 after passing through the second multiplexer 7, and the uplink is isolated by separating cavities to prevent same frequency interference; the device for inhibiting the loop saturation is a circulator or a limiter or an automatic gain control system 4; the 5G uplink radio frequency signal is also coupled and output to the network management system 5 through the coupler
Returning to the step S1, continuing to perform 5G signal processing until the 5G signal processing is completely finished;
s4, monitoring by the network management system: the network management system 5 monitors and adjusts the states of signals, circuits and power supplies;
s41, signal monitoring and adjusting: the network management system 5 receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, performs signal state detection, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the signal state; when the computer or the mobile phone APP sends out a command for adjusting the signal state, the network management system 5 adjusts the output power by electrically connecting the linear variable gain amplifier 41;
s42, circuit monitoring and adjusting: the network management system 5 receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, performs circuit state detection, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the circuit state;
s43, monitoring and adjusting power supply state: the network management system 5 detects the power state, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the power state; when the computer or the mobile phone APP sends out a repeater dormancy or shutdown instruction, the network management system 5 controls the repeater dormancy or shutdown.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A5G repeater signal processing method is characterized in that: the method comprises the following steps:
s1, the forward antenna (1) receives the downlink radio frequency signal: a forward antenna (1) receives a 5G downlink radio frequency signal and transmits the 5G downlink radio frequency signal to a downlink receiver for receiving, the 5G downlink radio frequency signal is transmitted to a synchronization circuit (2) after being filtered and coupled, the synchronization circuit (2) is electrified for cell search, PSS and SSS are searched firstly, a cell group ID is obtained, then time and frequency synchronization is obtained, MIB and SIB information are read, an uplink-downlink time slot ratio of TDDH is obtained in the SIB information, and a 5G downlink control signal and a 5G uplink control signal are output at intervals;
s2, downlink conduction: the 5G downlink control signal controls a radio frequency switch to conduct the downlink, at the moment, the uplink is closed, the 5G downlink radio frequency signal is transmitted by a backward antenna (3) after sequentially passing through the conducted radio frequency switch, low-noise amplification, drive amplification, loop saturation suppression, power amplification and filtering again after passing through the next conducted radio frequency switch, and the downlink is isolated by separating cavities to prevent same-frequency interference;
s3, uplink on: the 5G uplink control signal controls the radio frequency switch to conduct the uplink, at the moment, the downlink is closed, the backward antenna (3) receives the 5G uplink radio frequency signal and transmits the 5G uplink radio frequency signal to an uplink receiver for receiving, the 5G uplink radio frequency signal sequentially passes through the conducted radio frequency switch, low noise amplification, driving amplification, loop saturation suppression, power amplification and the next conducted radio frequency switch and then is filtered again and transmitted by the forward antenna (1), and the uplink prevents same frequency interference through cavity separation isolation;
returning to step S1, the 5G signal processing is continued until the 5G signal processing is all completed.
2. The signal processing method of a 5G repeater according to claim 1, wherein: in step S1, the synchronization circuit (2) includes a radio frequency channel (21) and an FPGA (22), where the radio frequency channel (21) is configured to receive the 5G downlink radio frequency signal, and the FPGA (22) is configured to perform cell search and output the 5G downlink control signal and the 5G uplink control signal at intervals.
3. The signal processing method of a 5G repeater according to claim 1, wherein: in steps S2 and S3, the loop saturation suppression device is a circulator, a limiter or an automatic gain control system (4).
4. The method for processing the signal of the 5G repeater according to claim 3, wherein:
the automatic gain control system (4) comprises a linear variable gain amplifier (41), a coupler (42) and an AGC (43);
the linear variable GAIN amplifier (41) is used for power amplification, the second coupler (42) is used for coupling and outputting to an AGC (43), the AGC (43) is used for adjusting the GAIN voltage of the linear variable GAIN amplifier (41), the correct balance between the input signal level of the AGC (43) and the set value voltage is achieved, and the linear variable GAIN amplifier (41) outputs a fixed power radio frequency signal.
5. The method for processing the signal of the 5G repeater according to claim 3, wherein:
in step S2, the 5G downlink rf signal is further coupled and output to the network management system (5) via a coupler;
in step S3, the 5G uplink rf signal is further coupled and output to the network management system (5) through a coupler;
further comprising step S4:
s4, monitoring by the network management system: the network management system (5) monitors and adjusts the states of signals, circuits and power supplies;
s41, signal monitoring and adjusting: the network management system (5) receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, detects the state of a signal, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the state of the signal; when the computer or the mobile phone APP sends out a command for adjusting the signal state, the network management system (5) adjusts the output power by electrically connecting the linear variable gain amplifier (41);
s42, circuit monitoring and adjusting: the network management system (5) receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, detects the circuit state, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the circuit state;
s43, monitoring and adjusting power supply state: the network management system (5) detects the power state, is communicated with the computer or the mobile phone APP through Bluetooth and a network port, and remotely monitors the power state; when the computer or the mobile phone APP sends out a repeater dormancy or shutdown instruction, the network management system (5) controls the repeater dormancy or shutdown.
6. The signal processing method of a 5G repeater according to claim 1, wherein:
s1, the forward antenna (1) receives the downlink radio frequency signal: the forward antenna (1) receives the 5G downlink radio frequency signal and transmits the 5G downlink radio frequency signal to the downlink receiver for reception, the 5G downlink radio frequency signal is coupled and then transmitted to the synchronization circuit (2), the synchronization circuit (2) is powered on to search a cell, PSS and SSS are searched first to obtain a cell group ID, then time and frequency synchronization is obtained, MIB and SIB information are read next, an uplink-downlink time slot ratio of TDDH is obtained in the SIB information, and the 5G downlink control signal and the 5G uplink control signal are output at intervals;
s2, downlink conduction: the 5G downlink control signal controls a radio frequency switch to conduct the downlink in a corresponding frequency range, at the moment, the uplink and the downlink in other frequency ranges are closed, the 5G downlink radio frequency signal passes through a first multiplexer (6) and then is output to the downlink in the corresponding frequency range, sequentially passes through the conducted radio frequency switch, low noise amplification, driving amplification, loop saturation suppression, power amplification, filtering again after passing through the next conducted radio frequency switch, and then is transmitted by the backward antenna (3) through a second multiplexer (7), and the downlink is isolated by separating cavities to prevent same frequency interference;
s3, uplink on: the 5G uplink control signal controls the radio frequency switch to conduct the uplink in a corresponding frequency range, at the moment, the downlink and the uplink in other frequency ranges are closed, the backward antenna (3) receives a 5G uplink radio frequency signal and transmits the signal to an uplink receiver, the 5G uplink radio frequency signal is output to the downlink in the corresponding frequency range after passing through the first multiplexer (6), sequentially passes through the conducted radio frequency switch, low noise amplification, drive amplification, loop saturation suppression, power amplification, filtering again after passing through the next conducted radio frequency switch, and is transmitted by the forward antenna (1) after passing through the second multiplexer (7), and the uplink is isolated by cavity separation to prevent same frequency interference; returning to step S1, the signal processing is continued until the 5G signal processing is completely completed.
7. The method for processing the signal of the 5G repeater according to claim 6, wherein:
in step S1, the 5G uplink control signal frequency range includes: a 2515MHz-2675MHz frequency band, a 3400MHz-3500MHz frequency band and a 3500MHz-3600MHz frequency band;
in step S2, the first multiplexer (6) and the second multiplexer (7) are triplexers, and the downlink includes three links, which respectively correspond to a 2515MHz-2675MHz frequency band, a 3400MHz-3500MHz frequency band, and a 3500MHz-3600MHz frequency band;
in step S3, the first multiplexer (6) and the second multiplexer (7) are triplexers, and the uplink includes three uplink channels corresponding to a 2515MHz-2675MHz frequency band, a 3400MHz-3500MHz frequency band, and a 3500MHz-3600MHz frequency band, respectively.
8. The method for processing the signal of the 5G repeater according to claim 7, wherein:
in step S2, the 5G downlink rf signal is coupled and output to the network management system (5) via a coupler;
in step S3, the 5G uplink rf signal is coupled and output to the network management system (5) via a coupler;
further comprising step S4:
s4, monitoring by the network management system: the network management system (5) monitors and adjusts the states of signals, circuits and power supplies;
s41, signal monitoring and adjusting: the network management system (5) receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, detects the state of a signal, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the state of the signal; when the computer or the mobile phone APP sends out a command for adjusting the signal state, the network management system (5) adjusts the output power by electrically connecting the linear variable gain amplifier (41);
s42, circuit monitoring and adjusting: the network management system (5) receives the 5G downlink radio frequency signal and the 5G uplink radio frequency signal, detects the circuit state, is communicated with a computer or a mobile phone APP through Bluetooth and a network port, and remotely monitors the circuit state;
s43, monitoring and adjusting power supply state: the network management system (5) detects the power state, is communicated with the computer or the mobile phone APP through Bluetooth and a network port, and remotely monitors the power state; when the computer or the mobile phone APP sends out a repeater dormancy or shutdown instruction, the network management system (5) controls the repeater dormancy or shutdown.
9. The signal processing method of a 5G repeater according to any one of claims 1-8, characterized in that:
in step S1, the radio frequency switch is a cascaded multi-stage switch;
in the steps S2 and S3, the cavity separation is as follows: the low-noise amplifying device and the driving amplifying device are arranged in the same cavity, and the loop saturation inhibiting device and the power amplifying device are arranged in the same cavity.
10. The signal processing method of a 5G repeater according to any one of claims 1-8, characterized in that: in step S1, the 5G downlink control signal is a downlink timeslot high level, and the 5G uplink control signal is an uplink timeslot high level;
and 2us after the 5G downlink radio frequency signal is transmitted by the backward antenna (3), the synchronous circuit (2) stops outputting the 5G downlink control signal, and the synchronous circuit (2) outputs the 5G uplink control signal after 3us delay.
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