Optical communication synchronization error correction method based on time-frequency synchronization analyzer

Abstract

The invention discloses an optical communication synchronization error correction method based on a time-frequency synchronization analyzer, relates to the technical field of optical communication, and solves the problems that characteristic parameters of synchronization signal data are difficult to extract and the type of the synchronization signal data is difficult to automatically analyze and identify. Secondly, the time offset, the frequency offset, the amplitude offset, the pulse width offset and the code rate offset are difficult to analyze according to the characteristic parameters; thirdly, performing synchronization error correction according to the analysis result of the synchronization error value; and finally, the correction result is difficult to comprehensively evaluate. According to the invention, the type of the synchronization signal data is automatically identified through the time-frequency synchronization analyzer, and whether correction is needed is judged by analyzing the synchronization error value; and the correction result is comprehensively evaluated according to the synchronization error values before and after correction, so that the synchronization error correction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of optical communication, and in particular is an optical communication synchronization error correction method based on a time-frequency synchronization analyzer. Background Art

[0002] The XQ-980 time-frequency synchronization analyzer is a professional device used to measure and analyze the time-frequency characteristics of signals. It provides high-performance client processing capabilities and hardware architecture design based on hardware timestamps, thereby achieving high scalability and maximum network availability. In optical communication systems, synchronization signals may have errors, which will affect the performance and stability of the system. The time-frequency synchronization analyzer can collect synchronization signal data in real time and analyze it, which can accurately determine the synchronization error value in the optical communication system and provide strong support for subsequent correction operations.

[0003] The existing optical communication synchronization error correction method based on time-frequency synchronization analyzer has the following problems: first, it is difficult to extract the characteristic parameters of the synchronization signal data and to automatically analyze and identify the type of the synchronization signal data; second, it is difficult to analyze the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset according to the characteristic parameters; then, it is difficult to perform synchronization error correction based on the analysis results of the synchronization error value; finally, it is difficult to comprehensively evaluate the correction results. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes an optical communication synchronization error correction method based on a time-frequency synchronization analyzer, which is used to solve the following technical problems:

[0005] First, it is difficult to extract the characteristic parameters of the synchronization signal data and to automatically analyze and identify the type of the synchronization signal data; second, it is difficult to analyze the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset based on the characteristic parameters; then, it is difficult to perform synchronization error correction based on the analysis results of the synchronization error value; finally, it is difficult to comprehensively evaluate the correction results.

[0006] To solve the above problem, a first aspect of the present invention provides an optical communication synchronization error correction method based on a time-frequency synchronization analyzer, comprising the following steps:

[0007] S1: Connect the time-frequency synchronization analyzer to the optical communication system, and collect the synchronization signal data in the optical communication system in real time through the time-frequency synchronization analyzer;

[0008] S2: preprocessing the collected synchronization signal data including: cleaning and standardization;

[0009] S3: extract characteristic parameters of synchronization signal data and analyze and identify the type of synchronization signal data; analyze and calculate time offset, frequency offset, amplitude offset, pulse width offset and code rate offset according to the analysis results; comprehensively analyze the synchronization error value according to the calculation results;

[0010] S4: Perform synchronization error correction according to the analysis result of the synchronization error value;

[0011] S5: Comprehensive evaluation of the correction results.

[0012] As a further solution of the present invention: Step S1 comprises the following steps:

[0013] By accessing the GPS / BD dual-mode satellite signal, the time reference signal is obtained; at the same time, the time signal source of the Beidou satellite navigation system, GPS, IRI GB (DC) code, PTP network time message and PPS_TOD ground timing signal is received, and the synchronization signal data is collected in real time according to the time signal source. The synchronization signal data includes: a pulse signal synchronized with UTC coordinated universal time, IRI GB time code, PPS_TOD time message, and NTP / PTP network time message.

[0014] As a further solution of the present invention: the step S3, extracting characteristic parameters of the synchronization signal data and analyzing and identifying the type of the synchronization signal data, includes the following steps:

[0015] The collected and processed synchronization signal data is input into the time-frequency synchronization analyzer through the corresponding interface of the time-frequency synchronization analyzer, and the input synchronization signal data is filtered, amplified, and shaped;

[0016] The characteristic parameters of the input synchronization signal data extracted by the time-frequency synchronization analyzer include: characteristic parameters of pulse signals: frequency, amplitude and pulse width, characteristic parameters of IRIG-B time code: encoding format and code rate, characteristic parameters of serial port time message and network time message: data frame structure and timestamp;

[0017] The time-frequency synchronization analyzer stores characteristic patterns of different types of signals in advance. After extracting the characteristic parameters of the synchronization signal data, the time-frequency synchronization analyzer matches the characteristic parameters with the pre-stored patterns and automatically identifies the type of the incoming synchronization signal data.

[0018] Based on the results of feature extraction and pattern matching, after the time-frequency synchronization analyzer identifies the type of synchronization signal data, the display screen of the time-frequency synchronization analyzer displays the type and characteristic parameters of the connected synchronization signal data.

[0019] As a further solution of the present invention: according to the analysis results, the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset are analyzed and calculated, including the following steps:

[0020] By analyzing the formula: E T =|T signal -T base |

[0021] Get the time offset E T ; Among them, T base Indicates the time base, T signal Indicates the timestamp of the synchronization signal data extraction;

[0022] By analyzing the formula:

[0023] Get the frequency offset E f ; Among them, f m Indicates the frequency of the pulse signal, f b Indicates standard frequency;

[0024] By analyzing the formula:

[0025] Get the amplitude offset E A Among them, A m Indicates the amplitude of the pulse signal, A b Indicates standard amplitude;

[0026] By analyzing the formula:

[0027] Get the pulse width offset E M ; Among them, M m Indicates the pulse width of the pulse signal, M b Indicates standard pulse width;

[0028] By analyzing the formula:

[0029] Get the code rate offset E R ; Among them, R m Indicates the code rate of the IRIG-B time code, R b Indicates the standard code rate.

[0030] As a further solution of the present invention: comprehensively analyzing the synchronization error value according to the calculation results, the following steps are included:

[0031] By analyzing the formula:

[0032] E=E T *w1+E f *w2+E A *w3+EM *w4+E R *w5

[0033] Get the synchronization error value E; where E T 、E f 、E A 、E M and E R They respectively represent time offset, frequency offset, amplitude offset, pulse width offset and code rate offset; w1, w2, w3, w4 and w5 respectively represent the weights corresponding to time offset, frequency offset, amplitude offset, pulse width offset and code rate offset.

[0034] As a further solution of the present invention: the step S4 comprises the following steps:

[0035] A threshold is set according to the synchronization error value, and the synchronization error value and the set threshold ζ are analyzed to determine whether correction is to be performed;

[0036] When E ≥ ζ, it means that the synchronization error value exceeds the threshold, and the synchronization signal data is corrected;

[0037] When E<ζ, it means that the synchronization error value does not exceed the threshold and no correction is required;

[0038] According to the corrected synchronization signal data, repeat step 3 to analyze whether the corrected synchronization signal data exceeds the threshold; when the corrected synchronization signal data does not exceed the threshold, it means that the correction is completed; otherwise, re-calibrate and repeat the above steps until the synchronization signal data does not exceed the threshold, and the correction is ended.

[0039] As a further solution of the present invention: the step S5 comprises the following steps:

[0040] By analyzing the formula:

[0041] The correction efficiency C is obtained; where E before Indicates the synchronization error value before correction, E after Indicates the corrected synchronization error value;

[0042] When C>10%, it indicates that the calibration is effective and the calibration is finished; when C≤10%, it indicates that the calibration is invalid and the process returns to step S1 to collect data again for calibration.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The present invention automatically extracts characteristic parameters and performs pattern matching through a time-frequency synchronization analyzer, thereby realizing automation of synchronization error correction and reducing the need for manual intervention.

[0045] The present invention sets a threshold to determine whether correction is required, thereby avoiding unnecessary correction operations, saving resources and time, and realizing rapid and accurate correction of synchronization errors in optical communication systems.

[0046] By comparing the synchronization error values ​​before and after the correction, the present invention can intuitively evaluate the effect of the correction and ensure the effectiveness of the correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] See also Figure 1 The first aspect of the present invention provides a method for correcting synchronization errors in optical communication based on a time-frequency synchronization analyzer, comprising the following steps:

[0051] S1: Connect the time-frequency synchronization analyzer to the optical communication system, and collect the synchronization signal data in the optical communication system in real time through the time-frequency synchronization analyzer;

[0052] S2: preprocessing the collected synchronization signal data including: cleaning and standardization;

[0053] S3: extract characteristic parameters of synchronization signal data and analyze and identify the type of synchronization signal data; analyze and calculate time offset, frequency offset, amplitude offset, pulse width offset and code rate offset according to the analysis results; comprehensively analyze the synchronization error value according to the calculation results;

[0054] S4: Perform synchronization error correction according to the analysis result of the synchronization error value;

[0055] S5: Comprehensive evaluation of the correction results.

[0056] Specifically, by connecting the time-frequency synchronization analyzer with the optical communication system, the synchronization signal data is collected in real time; the collected synchronization signal data is preprocessed, including: removing noise, abnormal values ​​and repeated values; applying filtering and smoothing algorithms to improve quality; unifying the format unit and normalizing the data. The time-frequency synchronization analyzer can simultaneously receive ground timing signals such as the Beidou satellite navigation system, GPS, IR IG-B (DC) code, PTP network time message and PPS_TOD, and generate pulse signals, IRI GB time codes, PPS_TOD time messages, and NTP / PTP network time messages that are synchronized with UTC, to ensure the effectiveness of the time signal output and provide a stable, reliable and accurate time and frequency reference. Extract the characteristic parameters of the synchronization signal data, according to the characteristic patterns of different types of signals pre-stored in the time-frequency synchronization analyzer, after extracting the characteristic parameters of the synchronization signal data, the time-frequency synchronization analyzer matches the characteristic parameters with the pre-stored pattern, automatically identifies the type of the accessed synchronization signal data, and displays the matching results on the LCD screen. Analyze the calculation time and comprehensively analyze the synchronization error value based on the calculation results. Determine whether to perform correction by analyzing the synchronization error value; when the correction is completed, repeat step S3 to calculate the synchronization error value after the correction is completed, and then determine whether to perform correction until the conditions are met and the correction is terminated. According to the synchronization error values ​​before and after the correction, comprehensively evaluate the correction results. When it is determined that the correction is effective, the correction is terminated; otherwise, return to step S1 and re-calibrate.

[0057] In one embodiment of the present invention, the step S1 comprises the following steps:

[0058] By accessing the GPS / BD dual-mode satellite signal, the time reference signal is obtained; at the same time, the time signal source of the Beidou satellite navigation system, GPS, I RI GB (DC) code, PTP network time message and PPS_TOD ground timing signal is received, and the synchronization signal data is collected in real time according to the time signal source. The synchronization signal data includes: a pulse signal synchronized with UTC coordinated universal time, I RI GB time code, PPS_TOD time message, and NTP / PTP network time message.

[0059] Specifically, the time-frequency synchronization analyzer adopts a tablet-style operation mode and is compatible with GPS / BD dual-mode satellite signal access. It can accurately measure time synchronization signals such as pulse signals, IRI GB AC and DC time codes, serial port time messages, SNTP network time messages, and IEEE 1588 precision network time synchronization messages, and can reproduce high-precision UTC time and generate high-precision clocks as test benchmarks. It can simultaneously receive ground timing signals such as the Beidou satellite navigation system, GPS, IRI GB (DC) code, PTP network time message, and PPS_TOD, and generate pulse signals, IRI GB time codes, PPS_TOD time messages, and NTP / PTP network time messages that are synchronized with UTC, ensuring the effectiveness of time signal output and providing stable, reliable, and accurate time and frequency benchmarks.

[0060] In one embodiment of the present invention, the step S3 of extracting characteristic parameters of the synchronization signal data and analyzing and identifying the type of the synchronization signal data includes the following steps:

[0061] The collected and processed synchronization signal data is input into the time-frequency synchronization analyzer through the corresponding interface of the time-frequency synchronization analyzer, and the input synchronization signal data is filtered, amplified, and shaped;

[0062] The characteristic parameters of the input synchronization signal data extracted by the time-frequency synchronization analyzer include: characteristic parameters of pulse signals: frequency, amplitude and pulse width, characteristic parameters of IRI GB time code: encoding format and code rate, characteristic parameters of serial port time message and network time message: data frame structure and timestamp;

[0063] The time-frequency synchronization analyzer stores characteristic patterns of different types of signals in advance. After extracting the characteristic parameters of the synchronization signal data, the time-frequency synchronization analyzer matches the characteristic parameters with the pre-stored patterns and automatically identifies the type of the incoming synchronization signal data.

[0064] Based on the results of feature extraction and pattern matching, after the time-frequency synchronization analyzer identifies the type of synchronization signal data, the display screen of the time-frequency synchronization analyzer displays the type and characteristic parameters of the connected synchronization signal data.

[0065] Specifically, the collected and processed synchronization signal data is input into the time-frequency synchronization analyzer through the corresponding interface of the time-frequency synchronization analyzer; the interface includes: external antenna interface BNC, level signal input and output interface, message receiving and output interface SFP, RJ45 interface and USB interface; necessary preprocessing is performed on the input synchronization signal data, such as filtering, amplification, shaping, etc., to ensure that the signal quality meets the analysis requirements; the time-frequency synchronization analyzer extracts characteristic parameters from the processed signal, and the time-frequency synchronization analyzer pre-stores characteristic patterns of different types of signals. After extracting the characteristic parameters of the synchronization signal data, the time-frequency synchronization analyzer matches these parameters with the pre-stored patterns and automatically identifies the type of the connected synchronization signal data. Based on the results of feature extraction and pattern matching, the time-frequency synchronization analyzer displays the type and characteristic parameters of the connected synchronization signal data on its display screen.

[0066] In one embodiment of the present invention, the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset are analyzed and calculated according to the analysis results, including the following steps:

[0067] By analyzing the formula: E T =|T signal -T base |

[0068] Get the time offset E T ; Among them, T base Indicates the time base, T signal Indicates the timestamp of the synchronization signal data extraction;

[0069] By analyzing the formula:

[0070] Get the frequency offset E f ; Among them, f m Indicates the frequency of the pulse signal, f b Indicates standard frequency;

[0071] By analyzing the formula:

[0072] Get the amplitude offset E A Among them, A m Indicates the amplitude of the pulse signal, A b Indicates standard amplitude;

[0073] By analyzing the formula:

[0074] Get the pulse width offset E M ; Among them, M m Indicates the pulse width of the pulse signal, M b Indicates standard pulse width;

[0075] By analyzing the formula:

[0076] Get the code rate offset E R ; Among them, R m Indicates the code rate of the IRIG-B time code, R b Indicates the standard code rate.

[0077] Specifically, the time offset is obtained by comparing the timestamp extracted from the synchronization signal data with the time reference. The frequency offset is obtained by analyzing the difference between the frequency of the pulse signal and the standard frequency. The amplitude offset is obtained by comparing the amplitude of the pulse signal with the standard amplitude. The pulse width offset is obtained by analyzing the difference between the pulse width of the pulse signal and the standard pulse width. The code rate offset is obtained by comparing the code rate of the IRIG-B time code with the standard code rate.

[0078] In one embodiment of the present invention, the synchronization error value is comprehensively analyzed according to the calculation result, including the following steps:

[0079] By analyzing the formula:

[0080] E=E T *w1+E f *w2+E A *w3+E M *w4+E R *w5

[0081] Get the synchronization error value E; where E T 、E f 、E A 、E M and E R They respectively represent time offset, frequency offset, amplitude offset, pulse width offset and code rate offset; w1, w2, w3, w4 and w5 respectively represent the weights corresponding to time offset, frequency offset, amplitude offset, pulse width offset and code rate offset.

[0082] Specifically, according to the characteristic parameters extracted from the synchronization signal data, the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset are analyzed and calculated, and the synchronization error value is obtained by multiplying the corresponding weights for comprehensive analysis. Among them, the weight of the time offset is 0.4; the weight of the frequency offset is 0.3; the weight of the amplitude offset is 0.2; the weight of the pulse width offset is 0.05; the weight of the code rate offset is 0.05. The actual weight should be determined according to the specific application scenario, performance requirements, and the actual impact of the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset. In actual applications, it may be necessary to optimize these weight values ​​through a large amount of testing and data analysis to achieve the best synchronization effect.

[0083] In one embodiment of the present invention, the step S4 comprises the following steps:

[0084] A threshold is set according to the synchronization error value, and the synchronization error value and the set threshold ζ are analyzed to determine whether correction is to be performed;

[0085] When E ≥ ζ, it means that the synchronization error value exceeds the threshold, and the synchronization signal data is corrected;

[0086] When E<ζ, it means that the synchronization error value does not exceed the threshold and no correction is required;

[0087] According to the corrected synchronization signal data, repeat step 3 to analyze whether the corrected synchronization signal data exceeds the threshold; when the corrected synchronization signal data does not exceed the threshold, it means that the correction is completed; otherwise, re-calibrate and repeat the above steps until the synchronization signal data does not exceed the threshold, and the correction is ended.

[0088] Specifically, according to the size and threshold of the synchronization error value, it is determined whether correction is required, and the threshold ζ is 50ns. Among them, the threshold can be dynamically adjusted according to the actual application scenario and historical data. When the synchronization error value exceeds the threshold, the synchronization signal data is corrected; if the synchronization error value does not exceed the threshold, no correction is required; according to the corrected synchronization signal data, step 3 is repeated to re-analyze and calculate to obtain the corrected synchronization error value, and then analyze whether the corrected synchronization signal data exceeds the threshold; when the corrected synchronization signal data does not exceed the threshold, it indicates that the correction is completed; otherwise, re-calibrate and repeat the above steps until the collected and processed synchronization signal data does not exceed the threshold, the process is terminated, and the correction is completed.

[0089] In one embodiment of the present invention, the step S5 comprises the following steps:

[0090] By analyzing the formula:

[0091] The correction efficiency C is obtained; where E before Indicates the synchronization error value before correction, E after Indicates the corrected synchronization error value;

[0092] When C>10%, it indicates that the calibration is effective and the calibration is finished; when C≤10%, it indicates that the calibration is invalid and the process returns to step S1 to collect data again for calibration.

[0093] Specifically, the correction efficiency is obtained by comparing the synchronization error value before and after the correction, and then multiplying it by percentage to analyze the correction efficiency more intuitively. By setting the threshold to 10%, when C>10%, it means that the correction is effective and the correction process can be ended to save resources and time; when C≤10%, it means that the correction is invalid, and the process returns to step S1, re-collects data, and re-corrects. By calculating the correction efficiency, the effect of the correction can be evaluated more accurately, thereby improving the overall correction accuracy.

[0094] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A method for correcting synchronization errors in optical communication based on a time-frequency synchronization analyzer, characterized in that: The method comprises the following steps: S1: Connect the time-frequency synchronization analyzer to the optical communication system, and collect the synchronization signal data in the optical communication system in real time through the time-frequency synchronization analyzer; S2: preprocessing the collected synchronization signal data including: cleaning and standardization; S3: extract characteristic parameters of synchronization signal data and analyze and identify the type of synchronization signal data; analyze and calculate time offset, frequency offset, amplitude offset, pulse width offset and code rate offset according to the analysis results; comprehensively analyze the synchronization error value according to the calculation results; S4: Perform synchronization error correction according to the analysis result of the synchronization error value; S5: Comprehensive evaluation of the correction results.

2. According to claim 1, a method for correcting synchronization errors in optical communication based on a time-frequency synchronization analyzer is characterized in that: The step S1 comprises the following steps: By accessing the GPS / BD dual-mode satellite signal, the time reference signal is obtained; at the same time, the time signal source of the Beidou satellite navigation system, GPS, IRIG-B (DC) code, PTP network time message and PPS_TOD ground timing signal is received, and the synchronization signal data is collected in real time according to the time signal source. The synchronization signal data includes: a pulse signal synchronized with UTC coordinated universal time, IRIG-B time code, PPS_TOD time message, and NTP / PTP network time message.

3. According to claim 1, a method for correcting synchronization errors in optical communication based on a time-frequency synchronization analyzer is characterized in that: The step S3, extracting characteristic parameters of the synchronization signal data and analyzing and identifying the type of the synchronization signal data, includes the following steps: The collected and processed synchronization signal data is input into the time-frequency synchronization analyzer through the corresponding interface of the time-frequency synchronization analyzer, and the input synchronization signal data is filtered, amplified, and shaped; The characteristic parameters of the input synchronization signal data extracted by the time-frequency synchronization analyzer include: characteristic parameters of pulse signals: frequency, amplitude and pulse width, characteristic parameters of IRIG-B time code: encoding format and code rate, characteristic parameters of serial port time message and network time message: data frame structure and timestamp; The time-frequency synchronization analyzer stores characteristic patterns of different types of signals in advance. After extracting the characteristic parameters of the synchronization signal data, the time-frequency synchronization analyzer matches the characteristic parameters with the pre-stored patterns and automatically identifies the type of the incoming synchronization signal data. Based on the results of feature extraction and pattern matching, after the time-frequency synchronization analyzer identifies the type of synchronization signal data, the display screen of the time-frequency synchronization analyzer displays the type and characteristic parameters of the connected synchronization signal data.

4. The optical communication synchronization error correction method based on a time-frequency synchronization analyzer according to claim 3, characterized in that: According to the analysis results, the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset are analyzed and calculated, including the following steps: By analyzing the formula: E T =|T signal -T base | Get the time offset E T ; Among them, T base Indicates the time base, T signal Indicates the timestamp of the synchronization signal data extraction; By analyzing the formula: Get the frequency offset E f ; Among them, f m Indicates the frequency of the pulse signal, f b Indicates standard frequency; By analyzing the formula: Get the amplitude offset E A Among them, A m Represents the amplitude of the pulse signal, A b Indicates standard amplitude; By analyzing the formula: Get the pulse width offset E M ; Among them, M m Indicates the pulse width of the pulse signal, M b Indicates standard pulse width; By analyzing the formula: Get the code rate offset E R ; Among them, R m Indicates the code rate of the IRIG-B time code, R b Indicates the standard code rate.

5. The optical communication synchronization error correction method based on a time-frequency synchronization analyzer according to claim 4, characterized in that: Comprehensively analyzing the synchronization error value based on the calculation results includes the following steps: By analyzing the formula: And=And T *w1+E f *w2+E A *w3+E M *w4+E R *w5 Get the synchronization error value E; where E T 、E f 、E A 、E M and E R They respectively represent time offset, frequency offset, amplitude offset, pulse width offset and code rate offset; w1, w2, w3, w4 and w5 respectively represent the weights corresponding to time offset, frequency offset, amplitude offset, pulse width offset and code rate offset.

6. The optical communication synchronization error correction method based on a time-frequency synchronization analyzer according to claim 5, characterized in that: The step S4 comprises the following steps: A threshold is set according to the synchronization error value, and the synchronization error value and the set threshold ζ are analyzed to determine whether correction is to be performed; When E ≥ ζ, it means that the synchronization error value exceeds the threshold, and the synchronization signal data is corrected; When E<ζ, it means that the synchronization error value does not exceed the threshold and no correction is required; According to the corrected synchronization signal data, repeat step 3 to analyze whether the corrected synchronization signal data exceeds the threshold; when the corrected synchronization signal data does not exceed the threshold, it means that the correction is completed; otherwise, re-calibrate and repeat the above steps until the synchronization signal data does not exceed the threshold, and the correction is ended.

7. The optical communication synchronization error correction method based on a time-frequency synchronization analyzer according to claim 1, characterized in that: The step S5 comprises the following steps: By analyzing the formula: The correction efficiency C is obtained; where E before Indicates the synchronization error value before correction, E after Indicates the corrected synchronization error value; When C>10%, it indicates that the calibration is effective and the calibration is finished; when C≤10%, it indicates that the calibration is invalid and the process returns to step S1 to collect data again for calibration.

8. The optical communication synchronization error correction method based on a time-frequency synchronization analyzer according to claim 5, characterized in that: The method further comprises: According to the characteristic parameters extracted from the synchronization signal data, the time offset, frequency offset, amplitude offset, pulse width offset and code rate offset are analyzed and calculated, and a comprehensive analysis is performed by multiplying them by corresponding weights to obtain a synchronization error value.

9. The optical communication synchronization error correction method based on a time-frequency synchronization analyzer according to claim 1, characterized in that: The method further comprises: The weight of the time offset is 0.4; the weight of the frequency offset is 0.3; the weight of the amplitude offset is 0.2; the weight of the pulse width offset is 0.05; and the weight of the code rate offset is 0.

05.

10. The optical communication synchronization error correction method based on a time-frequency synchronization analyzer according to claim 1, characterized in that: The method further comprises: The actual weight is determined according to the application scenario, performance requirements, and the time offset, the frequency offset, the amplitude offset, the pulse width offset, and the code rate offset.

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