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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

Active Publication Date: 2022-07-19
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] In the current nonlinear compensation algorithm, there are problems of insufficient algorithm compensation accuracy and high algorithm complexity. Therefore, a new nonlinear compensation algorithm is needed to accurately and efficiently compensate nonlinear damage in long-distance optical fiber transmission systems.

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

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Embodiment Construction

[0058] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] The purpose of the present invention is to provide a nonlinear damage compensation method and system in a long-distance optical communication system, so as to reduce the overall complexity while ensuring the signal compensation accuracy.

[0060]In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with referen...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2507H04B10/2513H04B10/2525H04B10/61
CPCH04B10/2507H04B10/2513H04B10/2525H04B10/6161H04B10/6163
Inventor 忻向军田凤王楚宣张琦刘博田清华高然王光全王瑞春王拥军
Owner BEIJING UNIV OF POSTS & TELECOMM
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