Compensation method and device with robustness under polarization effect, equipment and storage medium

Abstract

The invention discloses a compensation method and device with robustness under a polarization effect, equipment and a storage medium, belongs to the technical field of communication, and solves the problem that the robustness of a communication system is affected under the existing factors such as rapid polarization state disturbance. A compensation method with robustness under a polarization effect comprises the following steps that S1, a transmitting end processing module generates a polarization multiplexing signal, and a pair of pilot frequencies is inserted in each of two polarization directions of the polarization multiplexing signal to obtain a transmitting end signal; s2, sending the sending end signal to a receiving end digital processing module through a link with a polarization effect, extracting a damage matrix at an insertion position by the receiving end digital processing module according to the pilot frequency, and calculating differential group delay and polarization loss according to a channel matrix, and constructing a damage compensation matrix and completing compensation of the link with the polarization effect. The method provided by the invention has high robustness under the condition that polarization rotation and polarization mode dispersion are damaged in a polarization state.

Description

Technical Field

[0001] This invention belongs to the field of communication technology, and specifically relates to a robust compensation method, apparatus, device, and storage medium under polarization effects. Background Technology

[0002] With the rapid development of next-generation bandwidth-intensive information technologies such as artificial intelligence, the Internet of Things, autonomous driving, and telemedicine, the data traffic increase in data center interconnects and data center networks (DCI / DCN) is significant, urgently requiring next-generation 800Gbps or even 1.6Tbps broadband optical interconnects. Simultaneously, services such as artificial intelligence and computing power interconnects place higher demands on network stability. Under polarization effects, i.e., the coexistence of multiple impairments including rapid polarization state perturbations caused by polarization mode dispersion (PMD) and polarization rotation (RSOP), the robustness of communication systems is affected. Summary of the Invention

[0003] The purpose of this invention is to provide a robust compensation method, apparatus, device, and storage medium under polarization effects, which solves the problem that the robustness of existing communication systems is affected by factors such as rapid polarization state disturbances.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a robust compensation method under polarization effects, comprising the following steps:

[0005] Step S1: The transmitting end processing module generates a polarization multiplexed signal and inserts a pair of pilot signals in both polarization directions of the polarization multiplexed signal to obtain the transmitting end signal;

[0006] Step S2: The transmitting signal is sent to the receiving digital processing module through a link with polarization effect. The receiving processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effect.

[0007] In some embodiments, step S1 specifically includes:

[0008] Step S11: The transmitting end processing module generates two sets of random bit sequences and maps them into two sets of format signals;

[0009] Step S12: The two sets of formatted signals described in step S11 are shaped and modulated using filters and transmitted onto two sets of sub-channels with different polarization directions.

[0010] Step S13: Multiplex the two groups of sub-channels with different polarization directions from step 12, with each group of multiplexed sub-channels having no fewer than four sub-channels;

[0011] Step S14: Insert the symmetrical frequency points of the mirror band gap between the two sets of multiplexed sub-channels with different polarization directions in step S13 into the pilot signal to obtain the transmitting signal.

[0012] In some embodiments, steps S11-S14 are expressed by the following formulas:

[0013]

[0014] Among them, S x (t) and S y (t) represent the formatted signals, E x (t) and E y (t) represents the electric field of the transmitting module, where t is time; A represents the amplitude of the pilot signal. Pilot signals are inserted into the mirror band gaps between the multiplexed sub-channels to obtain the transmitting signal. The negative frequency band gap is denoted as k=1, and the positive frequency band gap as k=2, ω Xi1 ω represents the frequency of the pilot signal inserted within the negative frequency bandgap in the X-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Xi2 ω represents the frequency of the pilot signal inserted within the positive frequency bandgap in the X-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Yi1 ω represents the frequency of the pilot signal inserted within the negative frequency bandgap in the Y-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Yi2 ω represents the frequency of the pilot signal inserted within the positive frequency bandgap in the Y-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Xi1 ≈ω Yi1 ω Xi2 ≈ω Yi2 .

[0015] In some embodiments, before transmitting the transmitting signal to the receiving digital processing module via a link with polarization effects, the method further includes:

[0016] The transmitted signal is sequentially input into an arbitrary waveform generator and a dual polarization modulator for modulation, thereby converting the transmitted signal from an electrical signal into an optical signal.

[0017] In some embodiments, before transmitting the transmitting signal to the receiving digital processing module via a link with polarization effects, the method further includes:

[0018] The optical signal passes through the polarization-effect link and then through an optical filter before being received by a polarization diversity coherent receiver. The received signal is then acquired by an acquisition oscilloscope and sent to the receiving end digital processing module.

[0019] In some embodiments, the receiving end processing module further includes, before extracting the channel matrix at the insertion position based on the pilot signal:

[0020] The receiving digital processing module performs modulator delay and imbalance compensation on the signal acquired by the acquisition oscilloscope.

[0021] In some embodiments, the link with polarization effect specifically refers to:

[0022]

[0023] Among them, J Link It is a link with polarization effects, R1 is the high-speed RSOP transfer matrix, R2 is the low-speed RSOP transfer matrix, R psp,1 The output main state transition matrix for the differential group delay;

[0024] Where U represents the Jones domain transition matrix of the difference group delay, it can be expressed as:

[0025]

[0026] Where Δτ is defined as the differential group delay, and the transmitted signal is expressed as...

[0027]

[0028] Where n(t) is ASE noise.

[0029] In some embodiments, the receiving-end processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs an impairment compensation matrix, and completes the compensation for the link with polarization effects, specifically including:

[0030] Step S21: After the optical signal passes through the polarization-effect link, it undergoes down-conversion and passes through an optical filter. Then, it undergoes a Fast Fourier Transform to obtain the frequency domain response value at the pilot insertion point, such as... Figure 5 As shown:

[0031] Frequency domain response value C P′i，k (ω Pik P′ = X, Y; k = 1, 2; where the superscript of P′ represents the electrical domain information obtained after photoelectric detection at the receiving end;

[0032] Step S22, due to ω Xi1 ≈ω Yi1 Construct the Jones transition matrices for the two bandgap bands within the multiplexed sub-channel:

[0033]

[0034] Step S23: After extracting the Jones transition matrices within the two band gaps The negative frequency bandgap k = 1, the positive frequency bandgap k = 2, the differential group delay value Δτ is extracted, and RSOP is extracted by tracking. In formula (2) Simplified to U′(ω)R′, where:

[0035]

[0036] Where U′(ω) represents the matrix result of mapping the first-order polarization mode dispersion vector from the Stokes domain to the Jones domain, and I2 is the second-order identity matrix. satisfy Given the Pauli matrix vector; based on the properties of the two bandgap pilots, we obtain...

[0037]

[0038] Thus, the formula for calculating the equivalent polarization state rotation matrix R′ is obtained:

[0039]

[0040] Step S24: Extract the frequency-independent odd-symmetric components in U′(ω):

[0041]

[0042] Construct the damage compensation matrix for all frequency points, using the following formula:

[0043]

[0044] It should be noted that, Figure 5 In this context, LPF stands for low-pass filter, VOA is an adjustable optical attenuator used to adjust the input fiber power, and ASE is the amplifier's spontaneous emission noise.

[0045] Another technical solution of the present invention is implemented as follows: Figure 5 As shown, a robust compensation device under polarization effects is disclosed, comprising:

[0046] Transmitter processing module (transmitter DSP): The transmitter processing module generates a polarization multiplexed signal and inserts pilot signals into the two polarization directions of the polarization multiplexed signal to obtain the transmitter signal;

[0047] Receiver processing module (receiver DSP): The transmitter signal is sent to the receiver digital processing module through a link with polarization effect. The receiver processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effect.

[0048] Another technical solution of the present invention is implemented as follows: a compensation device with robustness under polarization effect, the compensation device with robustness under polarization effect includes: a memory, a processor, and a compensation program with robustness under polarization effect stored in the memory and executable on the processor, the compensation program with robustness under polarization effect is configured to implement a compensation method with robustness under polarization effect.

[0049] Another technical solution of the present invention is implemented as follows: a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the implementation of the steps in a robust compensation method under polarization effects.

[0050] Compared with existing technologies, the method in this invention is highly robust to damage caused by polarization rotation and polarization mode dispersion in the polarization state. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of a robust compensation device under polarization effects in the hardware operating environment involved in the embodiments of the present invention;

[0052] Figure 2 This is a flowchart illustrating the first embodiment of a robust compensation method under polarization effects according to the present invention.

[0053] Figure 3a The signal spectrum diagram of the X-polarization of the transmitting end processing module;

[0054] Figure 3b The signal spectrum diagram of Y polarization for the transmitter processing module.

[0055] Figure 4 This is a flowchart illustrating a second embodiment of a robust compensation method for polarization effects according to the present invention.

[0056] Figure 5 This is a structural block diagram of a first embodiment of a compensation device with robustness under polarization effects according to the present invention. Detailed Implementation

[0057] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0058] Reference Figure 1 , Figure 1 This is a schematic diagram of a compensation device structure that is robust to polarization effects in the hardware operating environment involved in the embodiments of the present invention.

[0059] like Figure 1As shown, the robust compensation device under polarization effects may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0060] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on a compensation device that is robust to polarization effects and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0061] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a compensation program that is robust to polarization effects.

[0062] exist Figure 1 In the polarization-resistant compensation device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the polarization-resistant compensation device of the present invention can be set in the polarization-resistant compensation device, and the polarization-resistant compensation device calls the polarization-resistant compensation program stored in the memory 1005 through the processor 1001 and executes the polarization-resistant compensation method provided in the embodiment of the present invention.

[0063] This invention provides a robust compensation method for polarization effects, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of a robust compensation method for polarization effects according to the present invention.

[0064] A robust compensation method for polarization effects includes the following steps:

[0065] Step S1: The transmitting end processing module generates a polarization multiplexed signal and inserts a pair of pilot signals in both polarization directions of the polarization multiplexed signal to obtain the transmitting end signal;

[0066] Step S2: The transmitting signal is sent to the receiving digital processing module through a link with polarization effect. The receiving processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effect.

[0067] It should be noted that by constructing the damage matrix, there is no need for feedback parameter update operations, which ensures that the method of the present invention can maintain the robustness of the system under high-speed polarization rotation caused by extreme external environments.

[0068] The present invention provides a second embodiment of a robust compensation method for polarization effects.

[0069] Based on the first embodiment described above, in this embodiment, step S1 specifically includes:

[0070] Step S11: The transmitting end processing module generates two sets of random bit sequences and maps them into two sets of format signals;

[0071] Step S12: The two sets of formatted signals described in step S11 are shaped and modulated using filters and transmitted onto two sets of sub-channels with different polarization directions.

[0072] Step S13: Multiplex the two groups of sub-channels with different polarization directions from step 12, with each group of multiplexed sub-channels having no fewer than four sub-channels;

[0073] Step S14: Insert the symmetrical frequency points of the mirror band gap between the two sets of multiplexed sub-channels with different polarization directions in step S13 into the pilot signal to obtain the transmitting signal.

[0074] It should be noted that the bandwidth of the channel is widened after the sub-channels are multiplexed. The signal spectrum generated by the transmitting end processing module is shown in Figure 3. Figure 3a Divided into X-polarized signal spectrum, Figure 3b The spectrum of the Y-polarized signal;

[0075] The present invention provides a third embodiment of a robust compensation method for polarization effects.

[0076] Based on the first embodiment described above, in this embodiment, steps S11-S14 are expressed by the following formulas:

[0077]

[0078] Among them, S x (t) and S y (t) represent the formatted signals, E x (t) and E y (t) represents the electric field of the transmitting module, where t is time; A represents the amplitude of the pilot signal. Pilot signals are inserted into the mirror band gaps between the multiplexed sub-channels to obtain the transmitting signal. The negative frequency band gap is denoted as k=1, and the positive frequency band gap as k=2, ω Xi1 ω represents the frequency of the pilot signal inserted within the negative frequency bandgap in the X-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Xi2 ω represents the frequency of the pilot signal inserted within the positive frequency bandgap in the X-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Yi1 ω represents the frequency of the pilot signal inserted within the negative frequency bandgap in the Y-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Yi2 ω represents the frequency of the pilot signal inserted within the positive frequency bandgap in the Y-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Xi1 ≈ω Yi1 ω Xi2 ≈ω Yi2 .

[0079] It should be noted that the transmitting end processing module has a transmitter, E x (t) and E y (t) represent the electric field after the transmitter completes the transmitting-end DSP (Digital Signal Processing) process. The pilot frequency difference within the same bandgap does not exceed 2GHz. Compared to the total signal power spectrum bandwidth of 150GHz, it has an approximate relationship ω. Xi1 ≈ω Yi1 ω Xi2 ≈ω Yi2 Furthermore, pilots with the same digital subscript frequency are located within the same bandgap. The power of the added pilot depends on the pilot signal power ratio (PSR), defined as PSR(dB) = 10log10(P pilot / P signal ), where P piiot P signal These represent the total power of the pilot signal and the total power of the signal, respectively.

[0080] The present invention provides a fourth embodiment of a robust compensation method for polarization effects.

[0081] Based on the first embodiment described above, before transmitting the transmitting signal to the receiving digital processing module via a link with polarization effect, the method further includes:

[0082] The transmitted signal is sequentially input into an arbitrary waveform generator and a dual polarization modulator for modulation, thereby converting the transmitted signal from an electrical signal into an optical signal.

[0083] It should be noted that converting electrical signals into optical signals and then transmitting them through optical fibers allows data to be transmitted in the form of light within the optical fibers, thereby enabling high-speed, long-distance data transmission.

[0084] The fifth embodiment of the present invention is a robust compensation method under polarization effects.

[0085] Based on the first embodiment described above, before transmitting the transmitting signal to the receiving digital processing module via a link with polarization effect, the method further includes:

[0086] The optical signal passes through the polarization-effect link and then through an optical filter before being received by a polarization diversity coherent receiver. The received signal is then acquired by an acquisition oscilloscope and sent to the receiving end digital processing module.

[0087] The sixth embodiment of the present invention is a robust compensation method under polarization effects.

[0088] Based on the first embodiment described above, the receiving end processing module further includes the following step before extracting the channel matrix at the insertion position based on the pilot signal:

[0089] The receiving digital processing module performs modulator delay and imbalance compensation on the signal acquired by the acquisition oscilloscope.

[0090] The seventh embodiment of the present invention is a robust compensation method under polarization effects.

[0091] Based on the first embodiment described above, the link with polarization effect is specifically as follows:

[0092]

[0093] Among them, J Link It is a link with polarization effects, R1 is the high-speed RSOP transfer matrix, R2 is the low-speed RSOP transfer matrix, R psp,1 The output main state transition matrix for the differential group delay;

[0094] Where U represents the Jones domain transition matrix of the difference group delay, it can be expressed as:

[0095]

[0096] Where Δτ is defined as the differential group delay, and the transmitted signal is expressed as...

[0097]

[0098] Where n(t) is the ASE noise;

[0099] The receiving-end processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effects, specifically including:

[0100] Step S21: After the optical signal passes through the polarization-effect link, it undergoes down-conversion and passes through an optical filter. Then, it undergoes a Fast Fourier Transform to obtain the frequency response value at the pilot insertion point.

[0101] Frequency domain response value C P′i,k (ω Pik P′ = X, Y; k = 1, 2; where the superscript of P′ represents the electrical domain information obtained after photoelectric detection at the receiving end;

[0102] Step S22, due to ω Xi1 ≈ω Yi1 Construct the Jones transition matrices for the two bandgap bands within the multiplexed sub-channel:

[0103]

[0104] It should be noted that the Jones transfer matrix of the channel is constructed by extracting the pilot information. Since all channel impairments considered in the current context are frequency-independent, the channel impairments are recovered by the inverse of this matrix. At the same time, subsequent impairment monitoring work needs to be calculated reasonably based on this matrix.

[0105] Step S23: Extract the Jones transfer matrix within the two pilot band gaps. Afterwards, with negative frequency bandgap k=1 and positive frequency bandgap k=2, the differential group delay value Δτ is extracted, and RSOP is extracted by tracking. In formula (2) It can be simplified to U(ω)R′, where:

[0106]

[0107] Where U′(ω) represents the matrix result of mapping the first-order polarization mode dispersion vector from the Stokes domain to the Jones domain, and I2 is the second-order identity matrix. satisfy Given the Pauli matrix vector; based on the properties of the two bandgap pilots, we obtain...

[0108]

[0109] Thus, the formula for calculating the equivalent polarization state rotation matrix R′ is obtained:

[0110]

[0111] Step S24: Extract the frequency-independent odd-symmetric components in U′(ω):

[0112]

[0113] Construct the damage compensation matrix for all frequency points, using the following formula:

[0114]

[0115] Reference Figure 4 , Figure 4 This is a structural block diagram of the first embodiment of the compensation device with robustness under polarization effect of the present invention.

[0116] like Figure 4 As shown, the robust compensation device under polarization effects proposed in this embodiment of the invention includes:

[0117] The robust compensation device under polarization effect includes:

[0118] Transmitter processing module: The transmitter processing module generates a polarization multiplexed signal and inserts pilot signals into the two polarization directions of the polarization multiplexed signal to obtain the transmitter signal;

[0119] Receiver processing module: The transmitter signal is sent to the receiver digital processing module through the link with polarization effect. The receiver processing module extracts the impairment matrix at the insertion position based on the pilot, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effect.

[0120] Simulation results obtained using the method of this invention show that the method can work normally and has high robustness under the background of coexistence of high-speed polarization rotation rate and polarization mode dispersion.

[0121] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0122] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0123] In addition, for technical details not described in detail in this embodiment, please refer to the robust compensation method under polarization effect provided in any embodiment of the present invention, which will not be repeated here.

[0124] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0125] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0126] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0127] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A robust compensation method for polarization effects, characterized in that, Includes the following steps: Step S1: The transmitting end processing module generates a polarization multiplexed signal and inserts a pair of pilot signals in both polarization directions of the polarization multiplexed signal to obtain the transmitting end signal; Step S2: The transmitting signal is sent to the receiving digital processing module through a link with polarization effect. The receiving processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effect.

2. The robust compensation method under polarization effects according to claim 1, characterized in that, Step S1 specifically includes: Step S11: The transmitting end processing module generates two sets of random bit sequences and maps them into two sets of format signals; Step S12: The two sets of formatted signals described in step S11 are shaped and modulated using filters and transmitted onto two sets of sub-channels with different polarization directions. Step S13: Multiplex the two groups of sub-channels with different polarization directions from step 12, with each group of multiplexed sub-channels having no fewer than four sub-channels; Step S14: Insert the symmetrical frequency points of the mirror band gaps between the two sets of multiplexed sub-channels with different polarization directions obtained in step S13 into the pilot signal to obtain the transmitting signal; the steps S1-S14 are expressed by the following formula: Among them, S x (t) and S y (t) represent the formatted signals, E x (t) and E y (t) represents the electric field of the transmitting module, where t is time; A represents the amplitude of the pilot signal. Pilot signals are inserted into the mirror band gaps between the multiplexed sub-channels to obtain the transmitting signal. The negative frequency band gap is denoted as k=1, and the positive frequency band gap as k=2, ω Xi1 ω represents the frequency of the pilot signal inserted within the negative frequency bandgap in the X-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Xi2 ω represents the frequency of the pilot signal inserted within the positive frequency bandgap in the X-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Yi1 ω represents the frequency of the pilot signal inserted within the negative frequency bandgap in the Y-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Yi2 ω represents the frequency of the pilot signal inserted within the positive frequency bandgap in the Y-polarization direction, where i represents the frequency of the pilot signal inserted into the in-phase component; Xi1 ≈ω Yi1 ,ω Xi2 ≈ω Yi2 .

3. The robust compensation method under polarization effects according to claim 2, characterized in that, Before transmitting the transmitted signal to the receiving digital processing module via a link with polarization effects, the process also includes: The transmitted signal is sequentially input into an arbitrary waveform generator and a dual polarization modulator for modulation, thereby converting the transmitted signal from an electrical signal into an optical signal.

4. The robust compensation method under polarization effects according to claim 3, characterized in that, Before transmitting the transmitted signal to the receiving digital processing module via a link with polarization effects, the following steps are also included: The optical signal passes through the polarization-effect link and then through an optical filter before being received by a polarization diversity coherent receiver. The received signal is then acquired by an acquisition oscilloscope and sent to the receiving end digital processing module.

5. The robust compensation method under polarization effects according to claim 4, characterized in that, Before the receiving end processing module extracts the channel matrix at the insertion position based on the pilot signal, it also includes: The receiving digital processing module performs modulator delay and imbalance compensation on the signal acquired by the acquisition oscilloscope.

6. The robust compensation method under polarization effects according to claim 5, characterized in that, The link with polarization effect is specifically: Among them, J Link It is a link with polarization effects, R1 is the high-speed RSOP transfer matrix, R2 is the low-speed RSOP transfer matrix, R psp,1 The output main state transition matrix for the differential group delay; Where U represents the Jones domain transition matrix of the difference group delay, it can be expressed as: Where Δτ is defined as the differential group delay, and the transmitted signal is expressed as... Where n(t) is ASE noise.

7. The robust compensation method under polarization effects according to claim 6, characterized in that, The receiving-end processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effects, specifically including: Step S21: After the optical signal passes through the polarization-effect link, it undergoes down-conversion and passes through an optical filter. Then, it undergoes a Fast Fourier Transform to obtain the frequency response value at the pilot insertion point. Frequency domain response value C P′i,k (ω Pik P′ = X, Y; k = 1, 2; where the superscript of P′ represents the electrical domain information obtained after photoelectric detection at the receiving end; Step S22, due to ω Xi1 ≈ω Yi1 Construct the Jones transition matrices for the two bandgap bands within the multiplexed sub-channel: Step S23: Extract the Jones transition matrices within the two band gaps. Afterwards, with negative frequency bandgap k=1 and positive frequency bandgap k=2, the differential group delay value Δτ is extracted, and RSOP is extracted by tracking. In formula (2) Simplified to U ′ (ω)R ′ ,in: Among them, U ′ (ω) represents the matrix result of mapping the first-order polarization mode dispersion vector from the Stokes domain to the Jones domain, where I2 is the second-order identity matrix. satisfy Given the Pauli matrix vector; based on the properties of the two bandgap pilots, we obtain... That is, the equivalent polarization state rotation matrix R is obtained. ′ The calculation formula is as follows: Step S24, for U ′ Extracting frequency-independent odd symmetric components from (ω): Construct the damage compensation matrix for all frequency points, using the following formula:

8. A compensation device with robustness under polarization effects, characterized in that, The robust compensation device under polarization effect includes: Transmitter processing module: The transmitter processing module generates a polarization multiplexed signal and inserts pilot signals into the two polarization directions of the polarization multiplexed signal to obtain the transmitter signal; Receiver processing module: The transmitter signal is sent to the receiver digital processing module through a link with polarization effect. The receiver processing module extracts the impairment matrix at the insertion position based on the pilot signal, calculates the differential group delay and polarization loss based on the channel matrix, constructs the impairment compensation matrix, and completes the compensation for the link with polarization effect.

9. A compensation device with robustness under polarization effects, characterized in that, The robust compensation device under polarization effect includes: a memory, a processor, and a robust compensation program under polarization effect stored in the memory and executable on the processor, the robust compensation program under polarization effect being configured to implement the robust compensation method under polarization effect according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it is able to implement the steps in the robust compensation method for polarization effects as described in any one of claims 1 to 7.

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