WO2020001651A1 - Data recovering method and apparatus - Google Patents
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- WO2020001651A1 WO2020001651A1 PCT/CN2019/093888 CN2019093888W WO2020001651A1 WO 2020001651 A1 WO2020001651 A1 WO 2020001651A1 CN 2019093888 W CN2019093888 W CN 2019093888W WO 2020001651 A1 WO2020001651 A1 WO 2020001651A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
- H04B10/6164—Estimation or correction of the frequency offset between the received optical signal and the optical local oscillator
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/615—Arrangements affecting the optical part of the receiver
- H04B10/6151—Arrangements affecting the optical part of the receiver comprising a polarization controller at the receiver's input stage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
- H04B10/6162—Compensation of polarization related effects, e.g., PMD, PDL
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
- H04B10/6165—Estimation of the phase of the received optical signal, phase error estimation or phase error correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
Definitions
- the present application relates to the field of optical communication technologies, and in particular, to a data recovery method and device.
- the coherent communication system uses a traditional coherent receiver, including a 90 ° optical mixer and a polarized beam splitter.
- the structure is complex, expensive, and consumes high power. , Users are difficult to accept. For this reason, a minimalist coherent communication system is proposed, which does not require a 90 ° optical hybrid and a polarized beam splitter (PBS), and only requires a coupler to achieve coherent reception. Compared with the traditional coherent optical receiver, the minimalist coherent optical receiver reduces the production cost and difficulty, and has a great cost advantage.
- the signals received by the minimalist coherent optical receiver include signals of two arbitrary polarization states (polarization insensitivity), X and Y, and data recovery cannot be achieved using traditional DSP algorithms.
- the first solution is a digital signal processing (DSP) algorithm that implements data recovery in the frequency domain.
- DSP digital signal processing
- FOC frequency offset compensation
- this solution requires accurate filtering of the probe. If the initial frequency offset is large, the probe may be lost and data recovery may fail. When there is an error in the frequency offset compensation, the phase recovery performance is poor, so the system is stable. There is no guarantee.
- Solution 2 Cascade LMS algorithm. Specifically, phase recovery, polarization demultiplexing, and dispersion compensation can be implemented in the time domain. However, there is no frame synchronization and frequency offset compensation module in this solution, so it is still impossible to achieve data recovery in the time domain.
- the present application provides a data recovery method and device for solving the problem of how to perform stable and accurate data recovery on an arbitrary polarization state signal received by a minimalist coherent optical receiver in the prior art.
- the present application provides a data recovery method including: receiving a polarization insensitive signal, performing frame synchronization on the one polarization insensitive signal, and determining a frame start position; and according to the one polarization insensitive signal Frame start position and frame structure, extract the synchronization header overhead and DSP overhead in the one polarization insensitive signal; perform frequency offset compensation for the data portion in the one polarization insensitive signal according to the DSP overhead; A reference sequence synchronization header overhead, carrier phase compensation is performed on the synchronization header overhead, and an initial MIMO coefficient is determined according to the synchronization head overhead after the carrier phase compensation; an initial phase is determined according to the initial MIMO coefficient; and an initial MIMO is determined according to the initial MIMO coefficient.
- the coefficient and the initial phase determine the updated MIMO coefficient and the updated phase; and perform a data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase Carrier phase compensation and polarization demultiplexing.
- a minimalist coherent optical receiver can determine the synchronization head overhead and DSP overhead in a received polarization-insensitive signal, and perform frequency offset compensation on the data portion of the polarization-insensitive signal according to the DSP overhead.
- Sync header overhead Carrier phase compensation is performed on the synchronization header overhead of the polarization-insensitive signal.
- the MIMO coefficient is determined by an algorithm, and the updated MIMO coefficient and the updated phase are further determined. The updated MIMO coefficient is used.
- the updated phase performs carrier phase compensation and polarization demultiplexing on the data portion of a polarization-insensitive signal, that is, the received arbitrary polarization signal is stably and accurately restored.
- the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, so In the special frame structure, a synchronization header overhead is inserted at a setting position of a frame header of the first polarization state signal and the second polarization state signal, and a DSP overhead is inserted at a setting position of a data frame.
- the synchronization header overhead is a frame inserted with a first set frame length at a frame header interval between the first polarization state signal and the second polarization state signal; and the DSP overhead is A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
- the synchronization head overhead of the polarization state of the first polarization state signal and the synchronization head overhead of the second polarization state are spaced, so that at the same time, there is only one group of polarization insensitive signals during data transmission.
- the data is the same when the DSP overhead is inserted and when the synchronization header overhead is inserted.
- the first reference sequence is a reference sequence corresponding to a polarized signal with a larger power in a synchronization head overhead of the first polarization state signal and a synchronization head overhead of the second polarization state signal.
- selecting the reference sequences with a high power consumption among the reference sequence of the first polarization state signal and the reference sequence of the second polarization state signal can improve the accuracy of subsequent processing.
- performing frame synchronization on the one polarization-insensitive signal to determine a frame start position includes: calculating a synchronization header overhead of a first set frame length and a first reference sequence. Correlation of synchronization header overhead to determine frame start position.
- performing frequency offset compensation on the data portion of the one polarization-insensitive signal according to the DSP overhead includes determining a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence. , Performing frequency offset compensation on a data portion of the one polarization insensitive signal according to the offset.
- determining the initial MIMO coefficient according to the synchronization header overhead after carrier phase compensation includes: calculating the synchronization header overhead after carrier phase compensation through the LMS algorithm to determine the initial MIMO coefficient.
- a rough estimation of the initial MIMO coefficient can accelerate the convergence speed of the cascaded LMS error curve and improve the system performance.
- determining the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase includes: determining according to the initial MIMO coefficient, the initial phase, and an LMS algorithm. Updated MIMO coefficient and updated phase.
- the present application provides a device including an acquisition unit and a processing unit.
- the acquisition unit is configured to receive a polarization insensitive signal
- the processing unit is configured to perform frame synchronization on the one polarization insensitive signal to determine a frame. Starting position; according to the frame start position and frame structure of the one polarization insensitive signal, the synchronization header overhead and DSP overhead in the one polarization insensitive signal are extracted; the one polarization insensitivity is not determined according to the DSP overhead.
- the data portion of the sensitive signal is subjected to frequency offset compensation; carrier phase compensation is performed on the synchronization header overhead according to the synchronization header overhead of the first reference sequence, and the initial MIMO coefficient is determined according to the synchronization header overhead after the carrier phase compensation;
- the initial phase is determined by the initial MIMO coefficient;
- the updated MIMO coefficient and the updated phase are determined according to the initial MIMO coefficient and the initial phase;
- the frequency offset compensation is performed based on the updated MIMO coefficient and the updated phase.
- Carrier phase compensation and polarization demultiplexing are performed on the data portion of the one polarization insensitive signal.
- the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, so In the special frame structure, a synchronization header overhead is inserted at a setting position of a frame header of the first polarization state signal and the second polarization state signal, and a DSP overhead is inserted at a setting position of a data frame.
- the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal;
- the DSP overhead A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
- the first reference sequence is a reference sequence corresponding to a polarized signal with a larger power in a synchronization head overhead of the first polarization state signal and a synchronization head overhead of the second polarization state signal.
- the processing unit when the processing unit performs frame synchronization on the one polarization-insensitive signal to determine a frame start position, the processing unit is specifically configured to calculate the synchronization header overhead and Correlation of a synchronization header overhead of the first reference sequence is used to perform frame synchronization to determine a frame start position.
- the processing unit when the processing unit performs frequency offset compensation on the data portion of the one polarization-insensitive signal according to the DSP overhead, the processing unit is specifically configured to determine the DSP overhead and the first reference sequence.
- the frequency offset of the DSP overhead is used to perform frequency offset compensation on the data portion of the one polarization insensitive signal according to the offset.
- the processing unit determines the initial MIMO coefficient according to the synchronization header overhead after carrier phase compensation, it is specifically used to calculate the synchronization header overhead after carrier phase compensation through the LMS algorithm to determine the initial MIMO. coefficient.
- the processing unit may derive the initial phase C based on the following formula:
- the initial MIMO coefficient * the data portion * 1 c a preset reference sequence.
- the processing unit determines the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase
- the processing unit is specifically configured to use the initial MIMO coefficient, the The initial phase and LMS algorithm determine the updated MIMO coefficient and the updated phase.
- the present application provides a method for transmitting data.
- the method includes: generating a polarization insensitive signal, wherein the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal,
- the first polarization state signal and the second polarization state signal have a special frame structure, and the special frame structure is inserted at a set position of a frame header of the first polarization state signal and the second polarization state signal.
- Synchronization header overhead inserting DSP overhead at the set position of the data frame; sending the one polarization insensitive signal.
- the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal;
- the DSP overhead A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
- the present application provides a device, the device including: a generating unit for generating a polarization insensitive signal, wherein the one polarization insensitive signal includes a first polarization state signal and a second polarization state Signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, and the special frame structure is a setting of a frame header of the first polarization state signal and the second polarization state signal.
- the location inserts the synchronization header overhead, and the DSP overhead is inserted at the set position of the data frame; the transceiver unit is configured to send the one polarization insensitive signal.
- the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal;
- the DSP overhead A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
- an embodiment of the present application further provides a device, including a processor, a memory, and a communication interface.
- the memory is used to store a computer program
- the processor is used to read the computer program stored in the memory and implement The first aspect, any design of the first aspect, the third aspect, and the method provided by any one of the third aspect.
- the present application further provides a computer-readable storage medium for storing functions for executing the first aspect, any one of the designs of the first aspect, the third aspect, and any one of the designs of the third aspect.
- the computer software instructions used include a program designed to execute the first aspect, any one of the designs of the first aspect, the third aspect, and any one of the designs of the third aspect.
- the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the first aspect and / or any one of the designs of the first aspect, the third aspect, and the third aspect. Either design the method described.
- FIG. 1 is a schematic diagram of a minimalist coherent communication system
- FIG. 4 is a schematic diagram of a data structure provided by the present application.
- FIG. 6 is a schematic diagram of a DSP algorithm provided by the present application.
- FIG. 7 is a schematic diagram of a device provided by this application.
- FIG. 8 is a schematic diagram of another device provided by the present application.
- FIG. 9 is a hardware structural diagram of a device provided by the present application.
- the embodiments of the present application provide a data recovery method and device, which are used to solve the problem of how to perform stable and accurate data recovery on an arbitrary polarization state signal received by a minimalist coherent optical receiver in the prior art.
- the method and equipment are based on the same inventive concept. Since the principle of the method and the equipment to solve the problem is similar, the implementation of the equipment and the method can refer to each other, and the duplicated parts are not described again.
- the coherent communication system uses traditional coherent receivers, including 90 ° optical mixers (optical hybrids) and Polarized beam splitter (PBS), but the structure is complex, expensive, high power consumption, and difficult for users to accept. For this reason, a minimalist coherent communication system 100 is proposed in the prior art. As shown in FIG. 1, the transmitting DP-IQ modulator 110 uses Alamouti coding on the signal to generate optical signals of two arbitrary polarization states, X and Y. It is a minimalist coherent optical receiver 120. The minimalist coherent optical receiver 120 does not include a 90 ° optical mixer and a polarized beam splitter.
- the received signal is an arbitrary polarization state.
- the minimalist coherent optical receiver 120 uses only one The coupler achieves coherent reception. Compared to traditional coherent optical receivers, the minimalist coherent optical receiver reduces the production cost and difficulty and has great cost advantages.
- the signals received by the minimalist coherent optical receiver include X and Y.
- a polarization-insensitive signal with any polarization state cannot use traditional DSP algorithms to achieve data recovery.
- DSP digital signal processing
- two solutions have been proposed in the prior art.
- the first solution is a digital signal processing (DSP) algorithm that implements data recovery in the frequency domain. Specifically, in the signal spectrum two Side-inserted probes achieve frequency offset compensation and phase recovery. However, this solution requires accurate filtering of the probe.
- DSP digital signal processing
- Solution 2 The cascaded LMS algorithm, as shown in Figure 2, can implement phase recovery, polarization demultiplexing, and dispersion compensation in the time domain.
- phase recovery polarization demultiplexing
- dispersion compensation there is no frame synchronization and frequency offset compensation module in this solution, so it is still impossible to achieve data recovery in the time domain. Therefore, how to perform stable and accurate data recovery on any polarization state signal received by a minimally coherent optical receiver, and realize phase recovery, polarization demultiplexing, frame synchronization, frequency offset compensation, and dispersion compensation are currently problems to be solved.
- a minimalist coherent optical receiver may determine a synchronization head overhead and a DSP overhead in a received polarization-insensitive signal, and perform frequency offset compensation on a data portion of the polarization-insensitive signal according to the DSP overhead. , Performing carrier phase compensation on the synchronization head overhead in the polarization insensitive signal according to the synchronization head overhead, determining a MIMO coefficient through a setting algorithm, and further determining the updated MIMO coefficient and the updated phase, and using the updated The MIMO coefficient and the updated phase perform carrier phase compensation and polarization demultiplexing on the data portion of a polarization-insensitive signal, and perform stable and accurate data recovery on any polarization signal received.
- FIG. 3 a flowchart of a data recovery method provided by the present application is provided.
- the processing process at the transmitting end uses the transmitting DP-IQ modulator shown in FIG. 1 as an execution subject, and the processing at the receiving end uses the minimal coherent optical receiver shown in FIG. 1 as an example for description.
- the method includes:
- Step S301 The originating DP-IQ modulator generates a polarization insensitive signal.
- the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal.
- the first polarization state signal and the second polarization state signal have a special frame structure.
- the special frame structure refers to A synchronization header overhead is inserted into a setting position of a frame header of the first polarization state signal and the second polarization state signal, and a setting position of a data frame in the first polarization state signal and the second polarization state signal is set.
- the DSP overhead is inserted.
- the foregoing data frame may also be referred to as a data portion.
- the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal.
- the DSP overhead is a frame of a third set frame length inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal, and the first polarization state
- a polarization state signal with a larger power in the synchronization header overhead of the signal and the synchronization header overhead of the second polarization state signal may be defined as the first reference sequence.
- Step S302 The transmitting DP-IQ modulator sends the one polarization insensitive signal to a minimalist coherent optical receiver.
- Step S303 The minimalist coherent optical receiver receives one polarization insensitive signal, performs frame synchronization on the one polarization insensitive signal, and determines a frame start position.
- a sliding window algorithm may be used to calculate the correlation between the synchronization header overhead of the first set frame length and the synchronization header overhead of the first reference sequence, and according to the calculated correlation, it is not sensitive to the polarization of one channel.
- the signal is frame-synchronized to determine the frame start position of the polarization insensitive signal of the channel.
- the first polarization state signal can also be referred to as the polarization state signal of X, which is denoted as Pol.X
- the second polarization state signal can also be referred to as the polarization state signal of Y, which is denoted as Pol.Y.
- the frame structure of Pol.X and Pol.Y is as shown in Figure 4.
- the Nbit-length synchronization header overhead is inserted at the frame headers of Pol.X and Pol.Y, respectively, and in Pol.X, respectively.
- Frames of Pol and Y are inserted into the DSP overhead of Abit length at every Bbit length position. Both Nbit and Abit positions can be set to 0, so that the polarized signal of X and the polarized signal of Y received by the receiver. For the superimposed signal, there is only one polarization signal at the frame overhead.
- Step S304 The minimally coherent optical receiver extracts a synchronization header overhead and a DSP overhead in the one polarization insensitive signal according to a frame start position and a special frame structure of the one polarization insensitive signal.
- the frame start position is the start position of the data frame, that is, the start position of the data part.
- Step S305 The minimally coherent optical receiver performs frequency offset compensation on a data portion of the one polarization insensitive signal according to the DSP overhead. Specifically, a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence is determined, and frequency offset compensation is performed on the data portion of the one polarization insensitive signal according to the offset.
- Step S306 The minimally coherent optical receiver performs carrier phase compensation on the synchronization header overhead according to the synchronization header overhead of the first reference sequence, and determines an initial MIMO coefficient according to the synchronization header overhead after the carrier phase compensation.
- the LMS algorithm can be used to calculate the synchronization header overhead after carrier phase compensation to determine the initial MIMO coefficient.
- Step S307 The minimally coherent optical receiver determines an initial phase according to the initial MIMO coefficient.
- the preset reference sequence can be set and stored in advance.
- the data portion is a signal portion in a data frame in the one polarization insensitive signal.
- Step S308 The minimally coherent optical receiver determines the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase.
- the initial MIMO coefficient and the initial phase may be calculated by a setting algorithm to determine the updated MIMO coefficient and the updated phase, wherein the setting algorithm may be a cascaded LMS algorithm, or may be For other algorithms, this application does not limit it.
- Step S309 The minimally coherent optical receiver performs carrier phase compensation and polarization demultiplexing on the data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase.
- a minimalist coherent optical receiver may determine a synchronization head overhead and a DSP overhead in a received polarization-insensitive signal, and perform frequency offset compensation on a data portion of the polarization-insensitive signal according to the DSP overhead. , Performing carrier phase compensation on the synchronization head overhead in the polarization insensitive signal according to the synchronization head overhead, determining a MIMO coefficient through a setting algorithm, and further determining the updated MIMO coefficient and the updated phase, and using the updated The MIMO coefficient and the updated phase perform carrier phase compensation and polarization demultiplexing on the data portion of a polarization-insensitive signal, and perform stable and accurate data recovery on any polarization signal received.
- the subsequent processing flow for the extracted synchronization header overhead and the DSP overhead may be performed in parallel, and the flowchart may also be shown in FIG. 5, assuming the receiver A received polarization-insensitive signal (received signal) is represented by x (n), and the output signal after data recovery is represented by y (n).
- the specific operation method is the same as the flow in Figure 3, but the expression is different. I won't go into details.
- FIG. 6 it is a schematic diagram of the DSP algorithm.
- the received signal x (n) is first frame synchronized, and then divided into two channels simultaneously. Processing, frequency offset compensation is performed all the way, and then parity separation is performed on the signal after frequency offset compensation to obtain x O (n) and Perform CPE on the synchronization header overhead all the way, then use the LMS to perform a rough estimation of the MIMO coefficients to obtain the initial MIMO coefficients and initial phases, and then iterate the initial MIMO coefficients and initial phases through the cascaded LMS algorithm to obtain the corrected MIMO coefficients and corrected phases , Through the modified MIMO coefficient and the modified phase-to-parity separation to obtain x O (n) and Perform data recovery to get y o (m) and y e (m). Combine y o (m) and y e (m) into one signal as output. The specific y o (m) and y e
- p 11 p 12 p 21 p 22 are MIMO coefficients
- c and c * are x O (n) and The phase corresponding to the signal.
- the minimum mean square error is used as the objective function.
- the phase and MIMO coefficient iterative formulas are:
- e o ⁇ d o -y o , e e ⁇ d e -y e , e o is the difference between the synchronization header overhead of the reference sequence and y o (m), and e e is the DSP overhead of the reference sequence and y e difference value (m) is, d o is the reference synchronization sequence header overhead, d e is the reference sequence of DSP overhead;
- FIG. 7 a schematic diagram of a device is also provided in this application, as shown in FIG. 7;
- the device includes: an obtaining unit 701 for receiving a polarization insensitive signal, and a processing unit 702 for performing frame synchronization on the one polarization insensitive signal to determine a frame start position; according to the one polarization insensitivity
- the frame start position and frame structure of the signal are used to extract the synchronization header overhead and DSP overhead of the one polarization insensitive signal; perform frequency offset compensation on the data portion of the one polarization insensitive signal according to the DSP overhead;
- the synchronization head overhead of the first reference sequence is used to perform carrier phase compensation on the synchronization head overhead, and an initial MIMO coefficient is determined according to the synchronization head overhead after the carrier phase compensation; the initial phase is determined according to the initial MIMO coefficient; and the initial MIMO is determined according to the initial MIMO coefficient.
- the coefficient and the initial phase determine the updated MIMO coefficient and the updated phase; and perform a data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase Carrier phase compensation and
- the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure
- a synchronization header overhead is inserted at a set position of a frame header of the first polarization state signal and the second polarization state signal
- a DSP overhead is inserted at a set position of a data frame.
- the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal; and the DSP overhead is at the first polarization state.
- the data frame of the signal and the second polarization state signal is inserted with a frame of a third set frame length every second set frame length.
- the first reference sequence may select a reference sequence corresponding to a polarization signal with a larger power out of a synchronization head overhead of the first polarization state signal and a synchronization head overhead of the second polarization state signal.
- the processing unit 702 may specifically perform frame synchronization by calculating the correlation between the synchronization header overhead of the first set frame length and the synchronization header overhead of the first reference sequence to determine the frame start position. And by determining a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence, frequency offset compensation may be performed on the data portion of the one polarization insensitive signal according to the offset.
- the processing unit 702 may further determine the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient, the initial phase, and the LMS algorithm.
- this application also provides a schematic diagram of a device for indicating the structure of the originator.
- the device includes a generating unit 801 for generating a polarization insensitive signal.
- the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, and the special frame structure is Insert a synchronization header overhead at the set position of the frame header of the first polarization state signal and the second polarization state signal, and insert a DSP overhead at the set position of the data frame;
- the transceiver unit 802 is configured to send the polarization of one channel Insensitive signals.
- the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal; and the DSP overhead is at the Among the data frames of the first polarization state signal and the second polarization state signal, frames of a third set frame length are inserted every second set frame length.
- each functional module in each embodiment of the present application may be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
- the above integrated modules can be implemented in the form of hardware or software functional modules.
- a device may include a processor 902.
- the hardware of the entity corresponding to the processing unit 702 and the generating unit 801 may be the processor 902.
- the processor 902 may be a central processing module (English: central processing unit, CPU for short), or a digital processing module.
- the device may further include a communication interface 901 (which may be a transceiver), and the hardware entity corresponding to the foregoing obtaining unit 701 and the receiving and sending unit 802 may be the communication interface 901.
- the device may further include: a memory 903, configured to store a program executed by the processor 902.
- the memory 903 may be a non-volatile memory, such as a hard disk (English: hard disk drive (abbreviation: HDD)) or a solid-state hard disk (English: solid-state drive (abbreviation: SSD)), etc., or a volatile memory (English: volatile memory), such as random-access memory (English: random-access memory, abbreviation: RAM).
- the memory 903 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
- the processor 902 is configured to execute the program code stored in the memory 903, and is specifically configured to execute the method according to the embodiment shown in FIG. 3. For details, reference may be made to the method described in the embodiment shown in FIG. 3, which is not repeatedly described in this application.
- the embodiments of the present application are not limited to the specific connection medium between the communication interface 901, the processor 902, and the memory 903.
- the memory 903, the processor 902, and the communication interface 901 are connected by a bus 904 in FIG. 9.
- the bus is indicated by a thick line in FIG. 9.
- the connection modes of other components are only schematically illustrated. It is not limited.
- the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
- An embodiment of the present invention further provides a computer-readable storage medium for storing computer software instructions to be executed to execute the processor, which includes a program for executing the processor.
- this application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
- computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
- the size of the sequence numbers of the above processes does not mean the order of execution, and some or all of the steps may be performed in parallel or sequentially.
- the execution order of each process shall be based on its function and The internal logic is determined without any limitation to the implementation process of the embodiments of the present application.
- These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions
- the device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.
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Abstract
A data restoring method and apparatus, for resolving the problem of how to perform stable and accurate data recovery on any polarization signal received by a simple coherent optical receiver. The method comprises: receiving a polarization insensitive signal, performing frame synchronization on the polarization insensitive signal, and determine a frame start position; extracting synchronization header overhead and DSP overhead according to the frame start position and a frame structure; performing frequency offset compensation on a data portion in the polarization insensitive signal according to the DSP overhead; performing carrier phase compensation on the synchronization header overhead according to the synchronization header overhead of a first reference sequence and determining an initial MIMO coefficient according to the synchronization header overhead after carrier phase compensation; next, determining an initial phase; determining updated MIMO coefficient and updated phase according to the initial MIMO coefficient and the initial phase; and performing carrier phase compensation and polarization de-multiplexing according to the updated MIMO coefficient and the updated phase.
Description
本申请要求于2018年6月30日提交中国专利局、申请号为201810716438.8、申请名称为“一种数据恢复方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims priority from a Chinese patent application filed with the Chinese Patent Office on June 30, 2018, with an application number of 201810716438.8, and an application name of "a data recovery method and device", the entire contents of which are incorporated herein by reference .
本申请涉及光通信技术领域,尤其涉及一种数据恢复方法及装置。The present application relates to the field of optical communication technologies, and in particular, to a data recovery method and device.
随着移动互联网和高清视频业务的兴起,城域网的流量呈现指数型增长,低时延和高带宽逐渐成为下一代城域光网络的需求。由于城域网业务带宽需求的增高,业务呈现低收敛比的特点,网络中需要为业务建立端到端的连接,即为特定业务在光层通过光波长直接建立一条端到端的通道,从而使该业务获得最低的传输时延,同时可以使得网络架构更加扁平化。为实现这一目的,最初采用相干通信***实现波长通道的选择,该相干通信***采用传统相干接收机,包括90°光混频器和偏振光分束器,结构复杂,成本昂贵,功耗高,用户难以接受。为此,提出了极简相干通信***,不需要90°光混频器(optical hybrid)和偏振光分束器(PBS),只需要一个耦合器即可实现相干接收。相对传统相干光接收机,极简相干光接收机降低了制作成本和难度,具有极大的成本优势。但极简相干光接收机接收的信号包含X,Y两个任意偏振态(偏振不敏感)的信号,无法利用传统DSP算法实现数据恢复。With the rise of mobile Internet and high-definition video services, the traffic of metropolitan area networks has grown exponentially, and low latency and high bandwidth have gradually become the requirements of next-generation metro optical networks. Due to the increasing bandwidth requirements of metropolitan area network services and the characteristics of low convergence ratio of services, the network needs to establish an end-to-end connection for the service, that is, an end-to-end channel is established directly at the optical layer for the specific service through the optical wavelength, so that the The service obtains the lowest transmission delay and can make the network architecture more flat. In order to achieve this purpose, a coherent communication system was initially used to implement the selection of the wavelength channel. The coherent communication system uses a traditional coherent receiver, including a 90 ° optical mixer and a polarized beam splitter. The structure is complex, expensive, and consumes high power. , Users are difficult to accept. For this reason, a minimalist coherent communication system is proposed, which does not require a 90 ° optical hybrid and a polarized beam splitter (PBS), and only requires a coupler to achieve coherent reception. Compared with the traditional coherent optical receiver, the minimalist coherent optical receiver reduces the production cost and difficulty, and has a great cost advantage. However, the signals received by the minimalist coherent optical receiver include signals of two arbitrary polarization states (polarization insensitivity), X and Y, and data recovery cannot be achieved using traditional DSP algorithms.
为了对偏振不敏感的信号数据恢复,现有技术中提出了两种方案,方案一、在频域上实现数据恢复的数字信号处理(digital signal processing,DSP)算法,具体的,在信号频谱两侧***探针实现频偏补偿(frequency offset,FOC)及相位恢复。但该方案要求对探针进行准确的滤波,若初始频偏较大时,可能会丢失探针从而导致数据恢复失败,且当频偏补偿存在误差时,相位恢复性能较差,因此***稳定性无法得到保障。方案二、级联LMS算法,具体的,可以在时域上实现相位恢复、偏振解复用及色散补偿。但该方案中没有帧同步及频偏补偿模块,因此仍然无法在时域上实现数据恢复。In order to recover polarization-insensitive signal data, two solutions have been proposed in the prior art. The first solution is a digital signal processing (DSP) algorithm that implements data recovery in the frequency domain. Specifically, in the signal spectrum two Side-inserted probes achieve frequency offset compensation (FOC) and phase recovery. However, this solution requires accurate filtering of the probe. If the initial frequency offset is large, the probe may be lost and data recovery may fail. When there is an error in the frequency offset compensation, the phase recovery performance is poor, so the system is stable. There is no guarantee. Solution 2: Cascade LMS algorithm. Specifically, phase recovery, polarization demultiplexing, and dispersion compensation can be implemented in the time domain. However, there is no frame synchronization and frequency offset compensation module in this solution, so it is still impossible to achieve data recovery in the time domain.
综上所述,在极简相干通信***中,传统的相干接收DSP算法无法在时域上解决频偏补偿、相位恢复等问题,因此无法实现数据恢复,如何对极简相干光接收机接收到的任意偏振态信号进行稳定准确地数据恢复,是目前需要解决的问题。In summary, in a minimalist coherent communication system, the traditional coherent receiving DSP algorithm cannot solve the problems of frequency offset compensation and phase recovery in the time domain, so data recovery cannot be achieved. How to receive a minimalist coherent optical receiver The stable and accurate data recovery of arbitrary polarization signals is a problem that needs to be solved at present.
发明内容Summary of the invention
本申请提供一种数据恢复方法及装置,用以解决现有技术中如何对极简相干光接收机接收到的任意偏振态信号进行稳定准确地数据恢复的问题。The present application provides a data recovery method and device for solving the problem of how to perform stable and accurate data recovery on an arbitrary polarization state signal received by a minimalist coherent optical receiver in the prior art.
第一方面,本申请提供了一种数据恢复方法,包括:接收到一路偏振不敏感信号,对所述一路偏振不敏感信号进行帧同步,确定帧起始位置;根据所述一路偏振不敏感信号的帧起始位置及帧结构,提取所述一路偏振不敏感信号中的同步头开销和DSP开销;根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿;根据第一参考序列的 同步头开销,对所述同步头开销进行载波相位补偿,并根据载波相位补偿后的同步头开销,确定初始MIMO系数;根据所述初始MIMO系数确定初始相位;根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位;根据所述更新后的MIMO系数及更新后的相位对频偏补偿后的所述一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用。In a first aspect, the present application provides a data recovery method including: receiving a polarization insensitive signal, performing frame synchronization on the one polarization insensitive signal, and determining a frame start position; and according to the one polarization insensitive signal Frame start position and frame structure, extract the synchronization header overhead and DSP overhead in the one polarization insensitive signal; perform frequency offset compensation for the data portion in the one polarization insensitive signal according to the DSP overhead; A reference sequence synchronization header overhead, carrier phase compensation is performed on the synchronization header overhead, and an initial MIMO coefficient is determined according to the synchronization head overhead after the carrier phase compensation; an initial phase is determined according to the initial MIMO coefficient; and an initial MIMO is determined according to the initial MIMO coefficient. The coefficient and the initial phase, determine the updated MIMO coefficient and the updated phase; and perform a data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase Carrier phase compensation and polarization demultiplexing.
通过上述方法,极简相干光接收机可以确定接收到的一路偏振不敏感信号中的同步头开销和DSP开销,根据DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿,根据同步头开销对所述一路偏振不敏感信号中的同步头开销进行载波相位补偿,通过设定算法确定MIMO系数,并进一步的确定更新后的MIMO系数及更新后的相位,使用更新后的MIMO系数及更新后的相位对一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用,即将接收到的任意偏振态信号进行稳定准确地进行数据恢复。Through the above method, a minimalist coherent optical receiver can determine the synchronization head overhead and DSP overhead in a received polarization-insensitive signal, and perform frequency offset compensation on the data portion of the polarization-insensitive signal according to the DSP overhead. Sync header overhead Carrier phase compensation is performed on the synchronization header overhead of the polarization-insensitive signal. The MIMO coefficient is determined by an algorithm, and the updated MIMO coefficient and the updated phase are further determined. The updated MIMO coefficient is used. And the updated phase performs carrier phase compensation and polarization demultiplexing on the data portion of a polarization-insensitive signal, that is, the received arbitrary polarization signal is stably and accurately restored.
在一种可能的设计中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销。In a possible design, the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, so In the special frame structure, a synchronization header overhead is inserted at a setting position of a frame header of the first polarization state signal and the second polarization state signal, and a DSP overhead is inserted at a setting position of a data frame.
通过该方法,在特殊帧结构的基础上,对接收到的一路偏振不敏感信号进行数据恢复,可以提高数据恢复的准确性。With this method, based on a special frame structure, data recovery is performed on a received polarization-insensitive signal, which can improve the accuracy of data recovery.
在一种可能的设计中,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔的***第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。In a possible design, the synchronization header overhead is a frame inserted with a first set frame length at a frame header interval between the first polarization state signal and the second polarization state signal; and the DSP overhead is A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
通过该方法,所述第一偏振态信号偏振态的同步头开销与所述第二偏振态的同步头开销是间隔的,使在同一时刻,一路偏振不敏感信号在进行数据传输时只有一组数据,在***DSP开销时与***同步头开销时相同。With this method, the synchronization head overhead of the polarization state of the first polarization state signal and the synchronization head overhead of the second polarization state are spaced, so that at the same time, there is only one group of polarization insensitive signals during data transmission. The data is the same when the DSP overhead is inserted and when the synchronization header overhead is inserted.
在一种可能的设计中,所述第一参考序列为第一偏振态信号的同步头开销与第二偏振态信号的同步头开销中功率较大的偏振态信号所对应的参考序列。In a possible design, the first reference sequence is a reference sequence corresponding to a polarized signal with a larger power in a synchronization head overhead of the first polarization state signal and a synchronization head overhead of the second polarization state signal.
通过该方法,选择第一偏振态信号的参考序列与第二偏振态信号的参考序列中功耗大的参考序列们,可以提高后续处理的准确性。By this method, selecting the reference sequences with a high power consumption among the reference sequence of the first polarization state signal and the reference sequence of the second polarization state signal can improve the accuracy of subsequent processing.
在一种可能的设计中,对所述一路偏振不敏感信号进行帧同步,确定帧起始位置,包括:通过计算第一设定帧长度的所述同步头开销与所述第一参考序列的同步头开销的相关性,确定帧起始位置。In a possible design, performing frame synchronization on the one polarization-insensitive signal to determine a frame start position includes: calculating a synchronization header overhead of a first set frame length and a first reference sequence. Correlation of synchronization header overhead to determine frame start position.
在一种可能的设计中,根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿,包括:确定所述DSP开销与第一参考序列的DSP开销的频率偏移量,根据所述偏移量对所述一路偏振不敏感信号中的数据部分进行频偏补偿。In a possible design, performing frequency offset compensation on the data portion of the one polarization-insensitive signal according to the DSP overhead includes determining a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence. , Performing frequency offset compensation on a data portion of the one polarization insensitive signal according to the offset.
在一种可能的设计中,根据载波相位补偿后的同步头开销,确定初始MIMO系数,包括:通过LMS算法对载波相位补偿后的同步头开销进行计算,确定初始MIMO系数。In a possible design, determining the initial MIMO coefficient according to the synchronization header overhead after carrier phase compensation includes: calculating the synchronization header overhead after carrier phase compensation through the LMS algorithm to determine the initial MIMO coefficient.
通过该方法,粗估初始MIMO系数,可以加快级联LMS误差曲线的收敛速度,提升***性能。By this method, a rough estimation of the initial MIMO coefficient can accelerate the convergence speed of the cascaded LMS error curve and improve the system performance.
在一种可能的设计中,可以基于如下公式推导所述初始相位C:所述初始MIMO系数*所述数据部分*1
c=预设的参考序列。
In a possible design, the initial phase C may be derived based on the following formula: the initial MIMO coefficient * the data portion * 1 c = a preset reference sequence.
在一种可能的设计中,根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO 系数及更新后的相位,包括:根据所述初始MIMO系数、所述初始相位以及LMS算法,确定更新后的MIMO系数及更新后的相位。In a possible design, determining the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase includes: determining according to the initial MIMO coefficient, the initial phase, and an LMS algorithm. Updated MIMO coefficient and updated phase.
第二方面,本申请提供一种装置,包括获取单元和处理单元,获取单元,用于接收到一路偏振不敏感信号,处理单元,用于对所述一路偏振不敏感信号进行帧同步,确定帧起始位置;根据所述一路偏振不敏感信号的帧起始位置及帧结构,提取的所述一路偏振不敏感信号中的同步头开销和DSP开销;根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿;根据第一参考序列的同步头开销,对所述同步头开销进行载波相位补偿,根据载波相位补偿后的同步头开销,确定初始MIMO系数;根据所述初始MIMO系数确定初始相位;根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位;根据所述更新后的MIMO系数及更新后的相位对频偏补偿后的所述一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用。In a second aspect, the present application provides a device including an acquisition unit and a processing unit. The acquisition unit is configured to receive a polarization insensitive signal, and the processing unit is configured to perform frame synchronization on the one polarization insensitive signal to determine a frame. Starting position; according to the frame start position and frame structure of the one polarization insensitive signal, the synchronization header overhead and DSP overhead in the one polarization insensitive signal are extracted; the one polarization insensitivity is not determined according to the DSP overhead. The data portion of the sensitive signal is subjected to frequency offset compensation; carrier phase compensation is performed on the synchronization header overhead according to the synchronization header overhead of the first reference sequence, and the initial MIMO coefficient is determined according to the synchronization header overhead after the carrier phase compensation; The initial phase is determined by the initial MIMO coefficient; the updated MIMO coefficient and the updated phase are determined according to the initial MIMO coefficient and the initial phase; and the frequency offset compensation is performed based on the updated MIMO coefficient and the updated phase. Carrier phase compensation and polarization demultiplexing are performed on the data portion of the one polarization insensitive signal.
在一种可能的设计中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销。In a possible design, the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, so In the special frame structure, a synchronization header overhead is inserted at a setting position of a frame header of the first polarization state signal and the second polarization state signal, and a DSP overhead is inserted at a setting position of a data frame.
在一种可能的设计中,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔的***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。In a possible design, the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal; the DSP overhead A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
在一种可能的设计中,所述第一参考序列为第一偏振态信号的同步头开销与第二偏振态信号的同步头开销中功率较大的偏振态信号所对应的参考序列。In a possible design, the first reference sequence is a reference sequence corresponding to a polarized signal with a larger power in a synchronization head overhead of the first polarization state signal and a synchronization head overhead of the second polarization state signal.
在一种可能的设计中,所述处理单元在对所述一路偏振不敏感信号进行帧同步,确定帧起始位置时,具体用于通过计算第一设定帧长度的所述同步头开销与所述第一参考序列的同步头开销的相关性,进行帧同步,确定帧起始位置。In a possible design, when the processing unit performs frame synchronization on the one polarization-insensitive signal to determine a frame start position, the processing unit is specifically configured to calculate the synchronization header overhead and Correlation of a synchronization header overhead of the first reference sequence is used to perform frame synchronization to determine a frame start position.
在一种可能的设计中,所述处理单元在根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿时,具体用于确定所述DSP开销与第一参考序列的DSP开销的频率偏移量,根据所述偏移量对所述一路偏振不敏感信号中的数据部分进行频偏补偿。In a possible design, when the processing unit performs frequency offset compensation on the data portion of the one polarization-insensitive signal according to the DSP overhead, the processing unit is specifically configured to determine the DSP overhead and the first reference sequence. The frequency offset of the DSP overhead is used to perform frequency offset compensation on the data portion of the one polarization insensitive signal according to the offset.
在一种可能的设计中,所述处理单元在根据载波相位补偿后的同步头开销,确定初始MIMO系数时,具体用于通过LMS算法对载波相位补偿后的同步头开销进行计算,确定初始MIMO系数。In a possible design, when the processing unit determines the initial MIMO coefficient according to the synchronization header overhead after carrier phase compensation, it is specifically used to calculate the synchronization header overhead after carrier phase compensation through the LMS algorithm to determine the initial MIMO. coefficient.
在一种可能的设计中,所述处理单元可以基于如下公式推导所述初始相位C:In a possible design, the processing unit may derive the initial phase C based on the following formula:
所述初始MIMO系数*所述数据部分*1
c=预设的参考序列。
The initial MIMO coefficient * the data portion * 1 c = a preset reference sequence.
在一种可能的设计中,所述处理单元在根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位时,具体用于根据所述初始MIMO系数、所述初始相位以及LMS算法,确定更新后的MIMO系数及更新后的相位。In a possible design, when the processing unit determines the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase, the processing unit is specifically configured to use the initial MIMO coefficient, the The initial phase and LMS algorithm determine the updated MIMO coefficient and the updated phase.
第三方面,本申请提供了一种数据发送的方法,所述方法包括:生成一路偏振不敏感信号,其中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销;发送所述一路偏振不敏感信号。In a third aspect, the present application provides a method for transmitting data. The method includes: generating a polarization insensitive signal, wherein the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, The first polarization state signal and the second polarization state signal have a special frame structure, and the special frame structure is inserted at a set position of a frame header of the first polarization state signal and the second polarization state signal. Synchronization header overhead, inserting DSP overhead at the set position of the data frame; sending the one polarization insensitive signal.
在一种可能的设计中,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信 号的帧头间隔的***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。In a possible design, the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal; the DSP overhead A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
第四方面,本申请提供了一种装置,所述装置包括:生成单元,用于生成一路偏振不敏感信号,其中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销;收发单元,用于发送所述一路偏振不敏感信号。According to a fourth aspect, the present application provides a device, the device including: a generating unit for generating a polarization insensitive signal, wherein the one polarization insensitive signal includes a first polarization state signal and a second polarization state Signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, and the special frame structure is a setting of a frame header of the first polarization state signal and the second polarization state signal The location inserts the synchronization header overhead, and the DSP overhead is inserted at the set position of the data frame; the transceiver unit is configured to send the one polarization insensitive signal.
在一种可能的设计中,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔的***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。In a possible design, the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal; the DSP overhead A frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
第五方面,本申请实施例还提供了一种装置,包括处理器、存储器和通信接口,所述存储器用于存储计算机程序,所述处理器用于读取所述存储器中存储的计算机程序并实现第一方面、第一方面的任意一种设计、第三方面、第三方面的任意一种设计提供的方法。In a fifth aspect, an embodiment of the present application further provides a device, including a processor, a memory, and a communication interface. The memory is used to store a computer program, and the processor is used to read the computer program stored in the memory and implement The first aspect, any design of the first aspect, the third aspect, and the method provided by any one of the third aspect.
第六方面,本申请还提供了一种计算机可读存储介质,用于存储为执行上述第一方面、第一方面的任意一种设计、第三方面、第三方面的任意一种设计的功能所用的计算机软件指令,其包含用于执行上述第一方面、第一方面的任意一种设计、第三方面、第三方面的任意一种设计的方法所设计的程序。According to a sixth aspect, the present application further provides a computer-readable storage medium for storing functions for executing the first aspect, any one of the designs of the first aspect, the third aspect, and any one of the designs of the third aspect. The computer software instructions used include a program designed to execute the first aspect, any one of the designs of the first aspect, the third aspect, and any one of the designs of the third aspect.
第七方面,本申请提供一种包含指令的计算机程序产品,当其在计算机上运行时,使得计算机执行第一方面和/或第一方面的任一种设计、第三方面、第三方面的任意一种设计所述的方法。In a seventh aspect, the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the first aspect and / or any one of the designs of the first aspect, the third aspect, and the third aspect. Either design the method described.
图1为一种极简相干通信***示意图;FIG. 1 is a schematic diagram of a minimalist coherent communication system;
图2为本申请提供的现有技术中一种级联LMS算法流程图;2 is a flowchart of a cascading LMS algorithm in the prior art provided by the present application;
图3为本申请提供的一种数据恢复的流程图;3 is a flowchart of data recovery provided by the present application;
图4为本申请提供的一种数据结构示意图;4 is a schematic diagram of a data structure provided by the present application;
图5为本申请提供的另一种数据恢复的流程图;5 is a flowchart of another data recovery process provided by the present application;
图6为本申请提供的一种DSP算法原理图;FIG. 6 is a schematic diagram of a DSP algorithm provided by the present application;
图7为本申请提供的一种装置示意图;FIG. 7 is a schematic diagram of a device provided by this application;
图8为本申请提供的另一种装置示意图;8 is a schematic diagram of another device provided by the present application;
图9为本申请提供的一种装置的硬件结构图。FIG. 9 is a hardware structural diagram of a device provided by the present application.
下面将结合附图对本申请实施例作进一步地详细描述。The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
本申请实施例提供一种数据恢复方法及装置,用于解决现有技术中如何对极简相干光接收机接收到的任意偏振态信号进行稳定准确地数据恢复的问题。其中,方法和设备是基于同一发明构思的,由于方法及设备解决问题的原理相似,因此设备与方法的实施可以相互参见,重复之处不再赘述。The embodiments of the present application provide a data recovery method and device, which are used to solve the problem of how to perform stable and accurate data recovery on an arbitrary polarization state signal received by a minimalist coherent optical receiver in the prior art. Among them, the method and equipment are based on the same inventive concept. Since the principle of the method and the equipment to solve the problem is similar, the implementation of the equipment and the method can refer to each other, and the duplicated parts are not described again.
随着城域光网络的发展,为了保证通信过程中数据的传输,采用相干通信***实现波 长通道的选择,该相干通信***采用传统相干接收机,包括90°光混频器(optical hybrid)和偏振光分束器(PBS),但结构复杂,成本昂贵,功耗高,用户难以接受。为此,现有技术中提出了极简相干通信***100,如图1所示,发端DP-IQ调制器110对信号采用Alamouti编码,生成X、Y两个任意偏振态的光信号,收端为极简相干光接收机120,极简相干光接收机120不包括90°光混频器和偏振光分束器,接收到的信号为任意偏振态,极简相干光接收机120只采用一个耦合器实现相干接收,相对于传统相干光接收机,极简相干光接收机虽然降低了制作成本和难度,具有极大的成本优势,但极简相干光接收机接收的信号包含X,Y两个任意偏振态的偏振不敏感信号,无法利用传统DSP算法实现数据恢复。为了对偏振不敏感的信号数据恢复,现有技术中提出了两种方案,方案一、在频域上实现数据恢复的数字信号处理(digital signal processing,DSP)算法,具体的,在信号频谱两侧***探针实现频偏补偿及相位恢复。但该方案要求对探针进行准确的滤波,若初始频偏较大时,可能会丢失探针从而导致数据恢复失败,且当频偏补偿存在误差时,相位恢复性能较差,因此***稳定性无法得到保障。方案二、级联LMS算法,如图2所示,可以在时域上实现相位恢复、偏振解复用及色散补偿。但该方案中没有帧同步及频偏补偿模块,因此仍然无法在时域上实现数据恢复。因此,如何对极简相干光接收机接收到的任意偏振态信号进行稳定准确地数据恢复,实现相位恢复、偏振解复用、帧同步、频偏补偿及色散补偿是目前需要解决的问题。With the development of metro optical networks, in order to ensure the transmission of data during communication, a coherent communication system is used to select the wavelength channel. The coherent communication system uses traditional coherent receivers, including 90 ° optical mixers (optical hybrids) and Polarized beam splitter (PBS), but the structure is complex, expensive, high power consumption, and difficult for users to accept. For this reason, a minimalist coherent communication system 100 is proposed in the prior art. As shown in FIG. 1, the transmitting DP-IQ modulator 110 uses Alamouti coding on the signal to generate optical signals of two arbitrary polarization states, X and Y. It is a minimalist coherent optical receiver 120. The minimalist coherent optical receiver 120 does not include a 90 ° optical mixer and a polarized beam splitter. The received signal is an arbitrary polarization state. The minimalist coherent optical receiver 120 uses only one The coupler achieves coherent reception. Compared to traditional coherent optical receivers, the minimalist coherent optical receiver reduces the production cost and difficulty and has great cost advantages. However, the signals received by the minimalist coherent optical receiver include X and Y. A polarization-insensitive signal with any polarization state cannot use traditional DSP algorithms to achieve data recovery. In order to recover polarization-insensitive signal data, two solutions have been proposed in the prior art. The first solution is a digital signal processing (DSP) algorithm that implements data recovery in the frequency domain. Specifically, in the signal spectrum two Side-inserted probes achieve frequency offset compensation and phase recovery. However, this solution requires accurate filtering of the probe. If the initial frequency offset is large, the probe may be lost and data recovery may fail. When there is an error in the frequency offset compensation, the phase recovery performance is poor, so the system is stable. There is no guarantee. Solution 2: The cascaded LMS algorithm, as shown in Figure 2, can implement phase recovery, polarization demultiplexing, and dispersion compensation in the time domain. However, there is no frame synchronization and frequency offset compensation module in this solution, so it is still impossible to achieve data recovery in the time domain. Therefore, how to perform stable and accurate data recovery on any polarization state signal received by a minimally coherent optical receiver, and realize phase recovery, polarization demultiplexing, frame synchronization, frequency offset compensation, and dispersion compensation are currently problems to be solved.
在本申请的描述中,“第一”、“第二”等词汇,仅用于区分描述的目的,而不能理解为指示或暗示相对重要性,也不能理解为指示或暗示顺序。In the description of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order.
本申请实施例中,极简相干光接收机可以确定接收到的一路偏振不敏感信号中的同步头开销和DSP开销,根据DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿,根据同步头开销对所述一路偏振不敏感信号中的同步头开销进行载波相位补偿,通过设定算法确定MIMO系数,并进一步的确定更新后的MIMO系数及更新后的相位,使用更新后的MIMO系数及更新后的相位对一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用,将接收到的任意偏振态信号进行稳定准确地进行数据恢复。In the embodiment of the present application, a minimalist coherent optical receiver may determine a synchronization head overhead and a DSP overhead in a received polarization-insensitive signal, and perform frequency offset compensation on a data portion of the polarization-insensitive signal according to the DSP overhead. , Performing carrier phase compensation on the synchronization head overhead in the polarization insensitive signal according to the synchronization head overhead, determining a MIMO coefficient through a setting algorithm, and further determining the updated MIMO coefficient and the updated phase, and using the updated The MIMO coefficient and the updated phase perform carrier phase compensation and polarization demultiplexing on the data portion of a polarization-insensitive signal, and perform stable and accurate data recovery on any polarization signal received.
下面结合附图对本申请提供数据恢复的方案进行具体说明。The following provides a detailed description of the data recovery solution provided by the present application with reference to the accompanying drawings.
参见图3,为本申请提供的一种数据恢复方法流程图。以下实施例中以发端的处理过程以上述图1中所示的发端DP-IQ调制器为执行主体、收端的处理过程以上述图1中所示的极简相干光接收机为例进行说明,该方法包括:Referring to FIG. 3, a flowchart of a data recovery method provided by the present application is provided. In the following embodiments, the processing process at the transmitting end uses the transmitting DP-IQ modulator shown in FIG. 1 as an execution subject, and the processing at the receiving end uses the minimal coherent optical receiver shown in FIG. 1 as an example for description. The method includes:
步骤S301、发端DP-IQ调制器生成一路偏振不敏感信号。其中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构是指在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在所述第一偏振态信号和所述第二偏振态信号中的数据帧的设定位置***DSP开销,上述数据帧也可以称为数据部分,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧,将第一偏振态信号的同步头开销中与第二偏振态信号的同步头开销中功率较大的偏振态信号可以定义为第一参考序列。Step S301: The originating DP-IQ modulator generates a polarization insensitive signal. The one polarization insensitive signal includes a first polarization state signal and a second polarization state signal. The first polarization state signal and the second polarization state signal have a special frame structure. The special frame structure refers to A synchronization header overhead is inserted into a setting position of a frame header of the first polarization state signal and the second polarization state signal, and a setting position of a data frame in the first polarization state signal and the second polarization state signal is set. The DSP overhead is inserted. The foregoing data frame may also be referred to as a data portion. The synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal. ; The DSP overhead is a frame of a third set frame length inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal, and the first polarization state A polarization state signal with a larger power in the synchronization header overhead of the signal and the synchronization header overhead of the second polarization state signal may be defined as the first reference sequence.
步骤S302、发端DP-IQ调制器向极简相干光接收机发送所述一路偏振不敏感信号。Step S302: The transmitting DP-IQ modulator sends the one polarization insensitive signal to a minimalist coherent optical receiver.
步骤S303、极简相干光接收机接收到一路偏振不敏感信号,对所述一路偏振不敏感信 号进行帧同步,确定帧起始位置。Step S303: The minimalist coherent optical receiver receives one polarization insensitive signal, performs frame synchronization on the one polarization insensitive signal, and determines a frame start position.
具体的,可以采用滑动窗口算法分别计算第一设定帧长度的所述同步头开销与所述第一参考序列的同步头开销的相关性,根据计算得到的相关性,对该一路偏振不敏感信号进行帧同步,以确定该路偏振不敏感信号的帧起始位置。Specifically, a sliding window algorithm may be used to calculate the correlation between the synchronization header overhead of the first set frame length and the synchronization header overhead of the first reference sequence, and according to the calculated correlation, it is not sensitive to the polarization of one channel. The signal is frame-synchronized to determine the frame start position of the polarization insensitive signal of the channel.
举例说明,如图4所示,第一偏振态信号也可以称为X的偏振态信号,表示为Pol.X,第二偏振态信号也可以称为Y的偏振态信号,表示为Pol.Y,Pol.X的帧结构与Pol.Y的帧结构具体如图4所示,分别在Pol.X和Pol.Y的帧头处间隔地***Nbit长度的同步头开销,以及分别在Pol.X和Pol.Y的帧每隔Bbit长度位置处***Abit长度的DSP开销,N bit和A bit位置上都可以置位为0,使接收机接收到的X的偏振态信号和Y的偏振态信号叠加的信号,在帧开销处只存在一个偏振态信号。For example, as shown in FIG. 4, the first polarization state signal can also be referred to as the polarization state signal of X, which is denoted as Pol.X, and the second polarization state signal can also be referred to as the polarization state signal of Y, which is denoted as Pol.Y. The frame structure of Pol.X and Pol.Y is as shown in Figure 4. The Nbit-length synchronization header overhead is inserted at the frame headers of Pol.X and Pol.Y, respectively, and in Pol.X, respectively. Frames of Pol and Y are inserted into the DSP overhead of Abit length at every Bbit length position. Both Nbit and Abit positions can be set to 0, so that the polarized signal of X and the polarized signal of Y received by the receiver. For the superimposed signal, there is only one polarization signal at the frame overhead.
步骤S304、上述极简相干光接收机根据所述一路偏振不敏感信号的帧起始位置及特殊帧结构,提取所述一路偏振不敏感信号中的同步头开销和DSP开销。Step S304: The minimally coherent optical receiver extracts a synchronization header overhead and a DSP overhead in the one polarization insensitive signal according to a frame start position and a special frame structure of the one polarization insensitive signal.
其中,上述帧起始位置就是数据帧的起始位置,也就是数据部分的起始位置。The frame start position is the start position of the data frame, that is, the start position of the data part.
步骤S305、上述极简相干光接收机根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿。具体的,确定所述DSP开销与第一参考序列的DSP开销的频率偏移量,根据所述偏移量对所述一路偏振不敏感信号中的数据部分进行频偏补偿。Step S305: The minimally coherent optical receiver performs frequency offset compensation on a data portion of the one polarization insensitive signal according to the DSP overhead. Specifically, a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence is determined, and frequency offset compensation is performed on the data portion of the one polarization insensitive signal according to the offset.
步骤S306、上述极简相干光接收机根据第一参考序列的同步头开销,对所述同步头开销进行载波相位补偿,并根据载波相位补偿后的同步头开销,确定初始MIMO系数。具体的,可以通过LMS算法对载波相位补偿后的同步头开销进行计算,确定初始MIMO系数。Step S306: The minimally coherent optical receiver performs carrier phase compensation on the synchronization header overhead according to the synchronization header overhead of the first reference sequence, and determines an initial MIMO coefficient according to the synchronization header overhead after the carrier phase compensation. Specifically, the LMS algorithm can be used to calculate the synchronization header overhead after carrier phase compensation to determine the initial MIMO coefficient.
步骤S307、上述极简相干光接收机根据所述初始MIMO系数确定初始相位。具体的,可以通过公式推导所述初始相位C:所述初始MIMO系数*所述数据部分*1
c=预设的参考序列。预设的参考序列可以预先设定并存储。所述数据部分为所述一路偏振不敏感信号中的数据帧中的信号部分。
Step S307: The minimally coherent optical receiver determines an initial phase according to the initial MIMO coefficient. Specifically, the initial phase C may be derived by a formula: the initial MIMO coefficient * the data portion * 1 c = a preset reference sequence. The preset reference sequence can be set and stored in advance. The data portion is a signal portion in a data frame in the one polarization insensitive signal.
步骤S308、上述极简相干光接收机根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位。具体的,可以通过设定算法对所述初始MIMO系数、所述初始相位进行运算以确定更新后的MIMO系数及更新后的相位,其中,所述设定算法可以为级联LMS算法,也可以为其它算法,本申请对其不做限定。Step S308: The minimally coherent optical receiver determines the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase. Specifically, the initial MIMO coefficient and the initial phase may be calculated by a setting algorithm to determine the updated MIMO coefficient and the updated phase, wherein the setting algorithm may be a cascaded LMS algorithm, or may be For other algorithms, this application does not limit it.
步骤S309、上述极简相干光接收机根据所述更新后的MIMO系数及更新后的相位,对频偏补偿后的所述一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用。Step S309: The minimally coherent optical receiver performs carrier phase compensation and polarization demultiplexing on the data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase. .
本申请实施例中,极简相干光接收机可以确定接收到的一路偏振不敏感信号中的同步头开销和DSP开销,根据DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿,根据同步头开销对所述一路偏振不敏感信号中的同步头开销进行载波相位补偿,通过设定算法确定MIMO系数,并进一步的确定更新后的MIMO系数及更新后的相位,使用更新后的MIMO系数及更新后的相位对一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用,将接收到的任意偏振态信号进行稳定准确地进行数据恢复。In the embodiment of the present application, a minimalist coherent optical receiver may determine a synchronization head overhead and a DSP overhead in a received polarization-insensitive signal, and perform frequency offset compensation on a data portion of the polarization-insensitive signal according to the DSP overhead. , Performing carrier phase compensation on the synchronization head overhead in the polarization insensitive signal according to the synchronization head overhead, determining a MIMO coefficient through a setting algorithm, and further determining the updated MIMO coefficient and the updated phase, and using the updated The MIMO coefficient and the updated phase perform carrier phase compensation and polarization demultiplexing on the data portion of a polarization-insensitive signal, and perform stable and accurate data recovery on any polarization signal received.
本申请实施例中,在步骤S304提取同步头开销和DSP开销之后,针对提取的同步头开销和DSP开销的后续处理流程可以是并行进行的,流程图也可以如图5所示,假设接收机接收到的一路偏振不敏感信号(接收信号)用x(n)表示,数据恢复后的输出信号用y(n)表示,具体操作方法与图3中的流程相同,只是表现方式有所区别,具体不再赘述。In the embodiment of the present application, after the synchronization header overhead and the DSP overhead are extracted in step S304, the subsequent processing flow for the extracted synchronization header overhead and the DSP overhead may be performed in parallel, and the flowchart may also be shown in FIG. 5, assuming the receiver A received polarization-insensitive signal (received signal) is represented by x (n), and the output signal after data recovery is represented by y (n). The specific operation method is the same as the flow in Figure 3, but the expression is different. I won't go into details.
下面通过一个详细的实施例对本申请提出的LMS级联算法进行详细的说明,具体如 图6所示,为DSP算法的原理图,接收信号x(n)首先进行帧同步,然后分成两路同时进行处理,一路进行频偏补偿,然后对频偏补偿后的信号进行奇偶分离得到x
O(n)和
一路对于同步头开销进行CPE,然后通过LMS进行MIMO系数粗估得到初始MIMO系数和初始相位,再然后通过级联LMS算法对初始MIMO系数和初始相位进行迭代得到修正后的MIMO系数和修正后的相位,通过修正后的MIMO系数和修正后的相位对奇偶分离得到x
O(n)和
进行数据恢复,得到y
o(m)和y
e(m),将y
o(m)和y
e(m)合并为一个信号作为输出,具体的y
o(m)和y
e(m)的公式如下:
The following describes the LMS cascade algorithm proposed in this application in detail through a detailed embodiment. As shown in FIG. 6, it is a schematic diagram of the DSP algorithm. The received signal x (n) is first frame synchronized, and then divided into two channels simultaneously. Processing, frequency offset compensation is performed all the way, and then parity separation is performed on the signal after frequency offset compensation to obtain x O (n) and Perform CPE on the synchronization header overhead all the way, then use the LMS to perform a rough estimation of the MIMO coefficients to obtain the initial MIMO coefficients and initial phases, and then iterate the initial MIMO coefficients and initial phases through the cascaded LMS algorithm to obtain the corrected MIMO coefficients and corrected phases , Through the modified MIMO coefficient and the modified phase-to-parity separation to obtain x O (n) and Perform data recovery to get y o (m) and y e (m). Combine y o (m) and y e (m) into one signal as output. The specific y o (m) and y e (m) The formula is as follows:
其中,p
11p
12p
21p
22为MIMO系数,c和c*分别为x
O(n)和
信号对应的相位,具体的,以最小均方差为目标函数,相位及MIMO系数迭代公式分别为:
Among them, p 11 p 12 p 21 p 22 are MIMO coefficients, and c and c * are x O (n) and The phase corresponding to the signal. Specifically, the minimum mean square error is used as the objective function. The phase and MIMO coefficient iterative formulas are:
其中,e
o←d
o-y
o,e
e←d
e-y
e,e
o为参考序列的同步头开销与y
o(m)的差值,e
e为参考序列的DSP开销与y
e(m)的差值,d
o为参考序列同步头开销,d
e为参考序列DSP开销;
其中,e
11←d
e{c/|c|}
-1-x
ep
11,u
p是预先设定的系数值;
其中,
其中,e
21←d
e{c/|c|}
-1-x
ep
21,
其中,
Among them, e o ← d o -y o , e e ← d e -y e , e o is the difference between the synchronization header overhead of the reference sequence and y o (m), and e e is the DSP overhead of the reference sequence and y e difference value (m) is, d o is the reference synchronization sequence header overhead, d e is the reference sequence of DSP overhead; Among them, e 11 ← d e {c / | c |} -1 -x e p 11 , and u p is a preset coefficient value; among them, Where e 21 ← d e {c / | c |} -1 -x e p 21 , among them,
基于与方法实施例同样的发明构思,本申请还提供了一种装置示意图,如图7所示;Based on the same inventive concept as the method embodiment, a schematic diagram of a device is also provided in this application, as shown in FIG. 7;
所述装置包括:获取单元701,用于接收到一路偏振不敏感信号,处理单元702,用于对所述一路偏振不敏感信号进行帧同步,确定帧起始位置;根据所述一路偏振不敏感信号的帧起始位置及帧结构,提取所述一路偏振不敏感信号中的同步头开销和DSP开销;根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿;根据第一参考序列的同步头开销,对所述同步头开销进行载波相位补偿,根据载波相位补偿后的同步头开销,确定初始MIMO系数;根据所述初始MIMO系数确定初始相位;根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位;根据所述更新后的MIMO系数及更新后的相位对频偏补偿后的所述一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用。The device includes: an obtaining unit 701 for receiving a polarization insensitive signal, and a processing unit 702 for performing frame synchronization on the one polarization insensitive signal to determine a frame start position; according to the one polarization insensitivity The frame start position and frame structure of the signal are used to extract the synchronization header overhead and DSP overhead of the one polarization insensitive signal; perform frequency offset compensation on the data portion of the one polarization insensitive signal according to the DSP overhead; The synchronization head overhead of the first reference sequence is used to perform carrier phase compensation on the synchronization head overhead, and an initial MIMO coefficient is determined according to the synchronization head overhead after the carrier phase compensation; the initial phase is determined according to the initial MIMO coefficient; and the initial MIMO is determined according to the initial MIMO coefficient. The coefficient and the initial phase, determine the updated MIMO coefficient and the updated phase; and perform a data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase Carrier phase compensation and polarization demultiplexing.
在一种可能的实现方式中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销。所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔的***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。In a possible implementation manner, the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, In the special frame structure, a synchronization header overhead is inserted at a set position of a frame header of the first polarization state signal and the second polarization state signal, and a DSP overhead is inserted at a set position of a data frame. The synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal; and the DSP overhead is at the first polarization state. The data frame of the signal and the second polarization state signal is inserted with a frame of a third set frame length every second set frame length.
示例性的,所述第一参考序列可以选择第一偏振态信号的同步头开销与第二偏振态信号的同步头开销中功率较大的偏振态信号所对应的参考序列。Exemplarily, the first reference sequence may select a reference sequence corresponding to a polarization signal with a larger power out of a synchronization head overhead of the first polarization state signal and a synchronization head overhead of the second polarization state signal.
所述处理单元702具体可以通过计算第一设定帧长度的所述同步头开销与所述第一参 考序列的同步头开销的相关性,进行帧同步,确定帧起始位置。并可以通过确定所述DSP开销与第一参考序列的DSP开销的频率偏移量,根据所述偏移量对所述一路偏振不敏感信号中的数据部分进行频偏补偿。The processing unit 702 may specifically perform frame synchronization by calculating the correlation between the synchronization header overhead of the first set frame length and the synchronization header overhead of the first reference sequence to determine the frame start position. And by determining a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence, frequency offset compensation may be performed on the data portion of the one polarization insensitive signal according to the offset.
所述处理单元702可以通过LMS算法对载波相位补偿后的同步头开销进行计算,确定初始MIMO系数。再基于公式所述初始MIMO系数*所述数据部分*1
c=预设的参考序列来推导所述初始相位C。
The processing unit 702 may calculate a synchronization header overhead after carrier phase compensation by using an LMS algorithm to determine an initial MIMO coefficient. Then, the initial phase C is derived based on the formula: the initial MIMO coefficient * the data part * 1 c = a preset reference sequence.
所述处理单元702进而可以根据上述所述初始MIMO系数、所述初始相位以及LMS算法,确定更新后的MIMO系数及更新后的相位。The processing unit 702 may further determine the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient, the initial phase, and the LMS algorithm.
基于与方法实施例同样的发明构思,本申请还提供了一种装置示意图,用于表示发端的结构,如图8所示,所述装置包括:生成单元801,用于生成一路偏振不敏感信号,其中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销;收发单元802,用于发送所述一路偏振不敏感信号。Based on the same inventive concept as the method embodiment, this application also provides a schematic diagram of a device for indicating the structure of the originator. As shown in FIG. 8, the device includes a generating unit 801 for generating a polarization insensitive signal. Wherein, the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, and the special frame structure is Insert a synchronization header overhead at the set position of the frame header of the first polarization state signal and the second polarization state signal, and insert a DSP overhead at the set position of the data frame; the transceiver unit 802 is configured to send the polarization of one channel Insensitive signals.
可选的,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔的***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。Optionally, the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal; and the DSP overhead is at the Among the data frames of the first polarization state signal and the second polarization state signal, frames of a third set frame length are inserted every second set frame length.
本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,另外,在本申请各个实施例中的各功能模块可以集成在一个处理器中,也可以是单独物理存在,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。The division of the modules in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. In addition, each functional module in each embodiment of the present application may be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.
其中,集成的模块既可以采用硬件的形式实现时,如图9所示,一种装置可以包括处理器902。上述处理单元702,生成单元801对应的实体的硬件可以为处理器902。处理器902,可以是一个中央处理模块(英文:central processing unit,简称CPU),或者为数字处理模块等等。所述设备还可以包括通信接口901(可以为收发器),上述获取单元701、收发单元802对应的硬件实体可以为通信接口901。该设备还可以包括:存储器903,用于存储处理器902执行的程序。存储器903可以是非易失性存储器,比如硬盘(英文:hard disk drive,缩写:HDD)或固态硬盘(英文:solid-state drive,缩写:SSD)等,还可以是易失性存储器(英文:volatile memory),例如随机存取存储器(英文:random-access memory,缩写:RAM)。存储器903是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。When the integrated module can be implemented in the form of hardware, as shown in FIG. 9, a device may include a processor 902. The hardware of the entity corresponding to the processing unit 702 and the generating unit 801 may be the processor 902. The processor 902 may be a central processing module (English: central processing unit, CPU for short), or a digital processing module. The device may further include a communication interface 901 (which may be a transceiver), and the hardware entity corresponding to the foregoing obtaining unit 701 and the receiving and sending unit 802 may be the communication interface 901. The device may further include: a memory 903, configured to store a program executed by the processor 902. The memory 903 may be a non-volatile memory, such as a hard disk (English: hard disk drive (abbreviation: HDD)) or a solid-state hard disk (English: solid-state drive (abbreviation: SSD)), etc., or a volatile memory (English: volatile memory), such as random-access memory (English: random-access memory, abbreviation: RAM). The memory 903 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
处理器902用于执行存储器903存储的程序代码,具体用于执行图3所示实施例所述的方法。可以参见图3所示实施例所述的方法,本申请在此不再赘述。The processor 902 is configured to execute the program code stored in the memory 903, and is specifically configured to execute the method according to the embodiment shown in FIG. 3. For details, reference may be made to the method described in the embodiment shown in FIG. 3, which is not repeatedly described in this application.
本申请实施例中不限定上述通信接口901、处理器902以及存储器903之间的具体连接介质。本申请实施例在图9中以存储器903、处理器902以及通信接口901之间通过总线904连接,总线在图9中以粗线表示,其它部件之间的连接方式,仅是进行示意性说明,并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图9中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。The embodiments of the present application are not limited to the specific connection medium between the communication interface 901, the processor 902, and the memory 903. In the embodiment of the present application, the memory 903, the processor 902, and the communication interface 901 are connected by a bus 904 in FIG. 9. The bus is indicated by a thick line in FIG. 9. The connection modes of other components are only schematically illustrated. It is not limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
本发明实施例还提供了一种计算机可读存储介质,用于存储为执行上述处理器所需执行的计算机软件指令,其包含用于执行上述处理器所需执行的程序。An embodiment of the present invention further provides a computer-readable storage medium for storing computer software instructions to be executed to execute the processor, which includes a program for executing the processor.
本领域内的技术人员应明白,本申请的实施例可提供为方法、***、或计算机程序产品。因此,本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art should understand that the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
应理解,在本申请的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,部分或全部步骤可以并行执行或先后执行,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean the order of execution, and some or all of the steps may be performed in parallel or sequentially. The execution order of each process shall be based on its function and The internal logic is determined without any limitation to the implementation process of the embodiments of the present application.
本申请是参照根据本申请的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。This application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to this application. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that instructions generated by the processor of the computer or other programmable data processing device may be used to Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions The device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, this application also intends to include these modifications and variations.
Claims (22)
- 一种数据恢复方法,其特征在于,所述方法包括:A data recovery method, characterized in that the method includes:接收到一路偏振不敏感信号,对所述一路偏振不敏感信号进行帧同步,确定帧起始位置;Receiving a polarization insensitive signal, performing frame synchronization on the polarization insensitive signal, and determining a frame start position;根据所述一路偏振不敏感信号的帧起始位置及帧结构,提取所述一路偏振不敏感信号中的同步头开销和数字信号处理DSP开销;Extracting a synchronization header overhead and a digital signal processing DSP overhead in the one polarization insensitive signal according to a frame start position and a frame structure of the one polarization insensitive signal;根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿;Performing frequency offset compensation on the data portion of the one polarization insensitive signal according to the DSP overhead;根据第一参考序列的同步头开销,对所述同步头开销进行载波相位补偿,并根据载波相位补偿后的同步头开销,确定初始MIMO系数;Performing carrier phase compensation on the synchronization header overhead according to the synchronization header overhead of the first reference sequence, and determining an initial MIMO coefficient according to the synchronization header overhead after the carrier phase compensation;根据所述初始MIMO系数确定初始相位;Determining an initial phase according to the initial MIMO coefficient;根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位;Determining the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase;根据所述更新后的MIMO系数及更新后的相位对频偏补偿后的所述一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用。Carrier phase compensation and polarization demultiplexing are performed on the data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase.
- 如权利要求1所述的方法,其特征在于,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销;The method according to claim 1, wherein the one polarization insensitive signal comprises a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have A special frame structure that inserts a synchronization header overhead at a set position of a frame header of the first polarization state signal and the second polarization state signal and inserts a DSP overhead at a set position of a data frame;所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。The synchronization header overhead is a frame of a first set frame length inserted between the frame headers of the first polarization state signal and the second polarization state signal; and the DSP overhead is at the first polarization state signal. And a frame of a third set frame length that is inserted every second set frame length of the data frame of the second polarization state signal.
- 如权利要求1所述的方法,其特征在于,所述第一参考序列为第一偏振态信号的同步头开销与第二偏振态信号的同步头开销中功率较大的偏振态信号所对应的参考序列。The method according to claim 1, wherein the first reference sequence is corresponding to a polarized signal with a higher power among a synchronization header overhead of the first polarization state signal and a synchronization header overhead of the second polarization state signal. Reference sequence.
- 如权利要求2所述的方法,其特征在于,对所述一路偏振不敏感信号进行帧同步,确定帧起始位置,包括:The method according to claim 2, wherein performing frame synchronization on the one polarization-insensitive signal to determine a frame start position comprises:通过计算第一设定帧长度的所述同步头开销与所述第一参考序列的同步头开销的相关性,确定帧起始位置。A frame start position is determined by calculating a correlation between the synchronization header overhead of the first set frame length and the synchronization header overhead of the first reference sequence.
- 如权利要求1所述的方法,其特征在于,根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿,包括:The method of claim 1, wherein performing frequency offset compensation on the data portion of the one polarization insensitive signal according to the DSP overhead comprises:确定所述DSP开销与第一参考序列的DSP开销的频率偏移量,根据所述偏移量对所述一路偏振不敏感信号中的数据部分进行频偏补偿。Determine a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence, and perform frequency offset compensation on the data portion of the one polarization insensitive signal according to the offset.
- 如权利要求1所述的方法,其特征在于,根据载波相位补偿后的同步头开销,确定初始MIMO系数,包括:The method according to claim 1, wherein determining the initial MIMO coefficient according to a synchronization header overhead after carrier phase compensation comprises:通过LMS算法对载波相位补偿后的同步头开销进行计算,确定初始MIMO系数。The LMS algorithm is used to calculate the synchronization header overhead after carrier phase compensation to determine the initial MIMO coefficient.
- 如权利要求1所述的方法,其特征在于,根据所述初始MIMO系数确定初始相位,包括:The method according to claim 1, wherein determining the initial phase according to the initial MIMO coefficient comprises:基于如下公式推导所述初始相位C:The initial phase C is derived based on the following formula:所述初始MIMO系数*所述数据部分*1 c=预设的参考序列。 The initial MIMO coefficient * the data portion * 1 c = a preset reference sequence.
- 如权利要求1所述的方法,其特征在于,根据所述初始MIMO系数、所述初始相 位,确定更新后的MIMO系数及更新后的相位,包括:The method according to claim 1, wherein determining the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase comprises:根据所述初始MIMO系数、所述初始相位以及LMS算法,确定更新后的MIMO系数及更新后的相位。Determining the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient, the initial phase, and the LMS algorithm.
- 一种数据恢复装置,其特征在于,所述装置包括:A data recovery device, characterized in that the device includes:获取单元,用于接收到一路偏振不敏感信号;An acquisition unit for receiving a polarization insensitive signal;处理单元,用于:Processing unit for:对所述一路偏振不敏感信号进行帧同步,确定帧起始位置;Performing frame synchronization on the one polarization insensitive signal to determine a frame start position;根据所述一路偏振不敏感信号的帧起始位置及帧结构,提取所述一路偏振不敏感信号中的同步头开销和数字信号处理DSP开销;Extracting a synchronization header overhead and a digital signal processing DSP overhead in the one polarization insensitive signal according to a frame start position and a frame structure of the one polarization insensitive signal;根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿;Performing frequency offset compensation on the data portion of the one polarization insensitive signal according to the DSP overhead;根据第一参考序列的同步头开销,对所述同步头开销进行载波相位补偿,根据载波相位补偿后的同步头开销,确定初始MIMO系数;Performing carrier phase compensation on the synchronization header overhead according to the synchronization header overhead of the first reference sequence, and determining an initial MIMO coefficient according to the synchronization header overhead after the carrier phase compensation;根据所述初始MIMO系数确定初始相位;Determining an initial phase according to the initial MIMO coefficient;根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位;Determining the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase;根据所述更新后的MIMO系数及更新后的相位对频偏补偿后的所述一路偏振不敏感信号中的数据部分进行载波相位补偿及偏振解复用。Carrier phase compensation and polarization demultiplexing are performed on the data portion of the one polarization-insensitive signal after frequency offset compensation according to the updated MIMO coefficient and the updated phase.
- 如权利要求9所述的装置,其特征在于,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销;The device according to claim 9, wherein the one polarization insensitive signal comprises a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have A special frame structure that inserts a synchronization header overhead at a set position of a frame header of the first polarization state signal and the second polarization state signal, and inserts a DSP overhead at a set position of a data frame;所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。The synchronization header overhead is a frame of a first set frame length inserted between the frame headers of the first polarization state signal and the second polarization state signal; and the DSP overhead is at the first polarization state signal. And a frame of a third set frame length that is inserted every second set frame length of the data frame of the second polarization state signal.
- 如权利要求9所述的装置,其特征在于,所述第一参考序列为第一偏振态信号的同步头开销与第二偏振态信号的同步头开销中功率较大的偏振态信号所对应的参考序列。The apparatus according to claim 9, wherein the first reference sequence is corresponding to a polarized signal with a higher power among a synchronization header overhead of the first polarization state signal and a synchronization header overhead of the second polarization state signal. Reference sequence.
- 如权利要求10所述的装置,其特征在于,所述处理单元在对所述一路偏振不敏感信号进行帧同步,确定帧起始位置时,具体用于:The apparatus according to claim 10, wherein when the processing unit performs frame synchronization on the one polarization-insensitive signal to determine a frame start position, the processing unit is specifically configured to:通过计算第一设定帧长度的所述同步头开销与所述第一参考序列的同步头开销的相关性,确定帧起始位置。A frame start position is determined by calculating a correlation between the synchronization header overhead of the first set frame length and the synchronization header overhead of the first reference sequence.
- 如权利要求9所述的装置,其特征在于,所述处理单元在根据所述DSP开销对所述一路偏振不敏感信号中的数据部分进行频偏补偿时,具体用于:The apparatus according to claim 9, wherein the processing unit is specifically configured to: when performing frequency offset compensation on a data portion of the one polarization insensitive signal according to the DSP overhead:确定所述DSP开销与第一参考序列的DSP开销的频率偏移量,根据所述偏移量对所述一路偏振不敏感信号中的数据部分进行频偏补偿。Determine a frequency offset between the DSP overhead and the DSP overhead of the first reference sequence, and perform frequency offset compensation on the data portion of the one polarization insensitive signal according to the offset.
- 如权利要求9所述的装置,其特征在于,所述处理单元在根据载波相位补偿后的同步头开销,确定初始MIMO系数时,具体用于:The apparatus according to claim 9, wherein the processing unit is specifically configured to: when determining an initial MIMO coefficient according to a synchronization header overhead after carrier phase compensation:通过LMS算法对载波相位补偿后的同步头开销进行计算,确定初始MIMO系数。The LMS algorithm is used to calculate the synchronization header overhead after carrier phase compensation to determine the initial MIMO coefficient.
- 如权利要求9所述的装置,其特征在于,所述处理单元在根据所述初始MIMO系数确定初始相位时,具体用于:The apparatus according to claim 9, wherein when the processing unit determines an initial phase according to the initial MIMO coefficient, the processing unit is specifically configured to:基于如下公式推导所述初始相位C:The initial phase C is derived based on the following formula:所述初始MIMO系数*所述数据部分*1 c=预设的参考序列。 The initial MIMO coefficient * the data portion * 1 c = a preset reference sequence.
- 如权利要求9所述的装置,其特征在于,所述处理单元在根据所述初始MIMO系数、所述初始相位,确定更新后的MIMO系数及更新后的相位时,具体用于:The apparatus according to claim 9, wherein when the processing unit determines the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient and the initial phase, the processing unit is specifically configured to:根据所述初始MIMO系数、所述初始相位以及LMS算法,确定更新后的MIMO系数及更新后的相位。Determining the updated MIMO coefficient and the updated phase according to the initial MIMO coefficient, the initial phase, and the LMS algorithm.
- 一种数据发送方法,其特征在于,所述方法包括:A data sending method, characterized in that the method includes:生成一路偏振不敏感信号,其中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销;Generating one polarization insensitive signal, wherein the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal have a special frame structure, The special frame structure is to insert a synchronization header overhead at a set position of a frame header of the first polarization state signal and the second polarization state signal, and insert a DSP overhead at a set position of a data frame;发送所述一路偏振不敏感信号。Sending the one polarization insensitive signal.
- 如权利要求17所述的方法,其特征在于,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔的***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。The method according to claim 17, wherein the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal. The DSP overhead is a frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
- 一种数据发送装置,其特征在于,所述装置包括:A data sending device, characterized in that the device includes:生成单元,用于生成一路偏振不敏感信号,其中,所述一路偏振不敏感信号中包含第一偏振态信号和第二偏振态信号,其中,所述第一偏振态信号和第二偏振态信号具有特殊帧结构,所述特殊帧结构为在所述第一偏振态信号和所述第二偏振态信号的帧头的设定位置***同步头开销,在数据帧的设定位置***DSP开销;A generating unit for generating a polarization insensitive signal, wherein the one polarization insensitive signal includes a first polarization state signal and a second polarization state signal, wherein the first polarization state signal and the second polarization state signal It has a special frame structure, which inserts a synchronization header overhead at a set position of a frame header of the first polarization state signal and the second polarization state signal, and inserts a DSP overhead at a set position of a data frame;收发单元,用于发送所述一路偏振不敏感信号。The transceiver unit is configured to send the one polarization insensitive signal.
- 如权利要求19所述的装置,其特征在于,所述同步头开销为在所述第一偏振态信号和所述第二偏振态信号的帧头间隔的***的第一设定帧长度的帧;所述DSP开销为在所述第一偏振态信号和所述第二偏振态信号的数据帧中每隔第二设定帧长度***的第三设定帧长度的帧。The apparatus according to claim 19, wherein the synchronization header overhead is a frame of a first set frame length inserted at a frame header interval between the first polarization state signal and the second polarization state signal. The DSP overhead is a frame of a third set frame length that is inserted every second set frame length in a data frame of the first polarization state signal and the second polarization state signal.
- 一种装置,其特征在于,包括处理器、存储器和通信接口;A device characterized by comprising a processor, a memory and a communication interface;所述存储器,存储有计算机程序;The memory stores a computer program;所述处理器,用于调用并执行所述存储器中存储的计算机程序,通过所述通信接口来实现如权利要求1-8或17-18中任一项所述的方法。The processor is configured to call and execute a computer program stored in the memory, and implement the method according to any one of claims 1-8 or 17-18 through the communication interface.
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有计算机指令,当所述指令在计算机上运行时,使得计算机执行如权利要求1-8或17-18任一项所述的方法。A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the instructions are run on a computer, the computer causes the computer to execute any one of claims 1-8 or 17-18 The method described.
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