A nonlinear damage compensation method and system in a long-distance optical communication system

An optical communication system and nonlinear damage technology, applied in the field of optical communication, can solve the problems of high algorithm complexity and insufficient algorithm compensation accuracy, and achieve the effect of reducing complexity and ensuring signal compensation accuracy
CN113489543BActive Publication Date: 2022-07-19BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Publication Date
2022-07-19

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Abstract

The invention relates to a nonlinear damage compensation method and system in a long-distance optical communication system. The method includes: performing gain adjustment on a complex signal at a receiving end, and outputting a gain signal; dividing the gain signal by spans and steps to obtain the step number division Perform dispersion compensation and nonlinear phase compensation on the gain signal divided by the number of steps, and output the signal to be judged; perform logistic regression judgment on the signal to be judged to determine the judgment result; the judgment result is that the compensation meets the standard or the compensation fails to meet the standard. ; When the judgment result is that the compensation does not meet the standard, the loss value is determined according to the judgment result; the nonlinear compensation coefficient of the nonlinear phase compensation is adjusted according to the loss value to perform cyclic compensation; when the judgment result is that the compensation reaches the standard, the gain signal completes the compensation. The present invention can reduce the overall complexity while ensuring the signal compensation accuracy.
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Description

technical field

[0001] The invention relates to the technical field of optical communication, in particular to a nonlinear damage compensation method and system in a long-distance optical communication system. Background technique

[0002] At present, the traditional optical fiber communication system has been unable to meet the increasing user demands due to the limited transmission capacity. Therefore, the optical fiber transmission capacity needs to be expanded.

[0003] For optical fiber transmission systems, to improve the transmission capacity, it is necessary to increase the transmission distance and transmission rate. It is the most important factor limiting the long-distance transmission of high-speed optical signals.

[0004] In order to realize high-capacity and long-distance transmission of high-speed signals, optical fiber nonlinear compensation must be considered.

[0005] In the current nonlinear compensation algorithms, there are problems of insufficient al...

Claims

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