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Signal compensation method for optical fiber communication system and system thereof

An optical fiber communication system and signal compensation technology, applied in optical fiber transmission, eliminating distortion/dispersion, etc., can solve problems such as time-consuming convergence optimization, low efficiency of signal compensation process, and increased calculation amount of digital signal processing modules.

Active Publication Date: 2020-11-24
BEIJING UNIV OF POSTS & TELECOMM +3
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Problems solved by technology

However, this method still takes a lot of time to converge and optimize the parameters, which in turn increases the computational load of the entire digital signal processing module, resulting in low efficiency of the signal compensation process

Method used

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  • Signal compensation method for optical fiber communication system and system thereof
  • Signal compensation method for optical fiber communication system and system thereof

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Embodiment Construction

[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0072] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0073] figure 1 It is a schematic flowchart of the signal compensation method used in the optical fiber communication system of the present invention. Such as figure 1 As shown, the signal compensation method us...

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Abstract

The invention relates to a signal compensation method for an optical fiber communication system and a system thereof. The method comprises the following steps: performing analog-to-digital conversionon a received signal of an optical fiber communication system to obtain a digital signal; obtaining parameters in the nonlinear compensation process of the current iteration based on a self-adaptive gradient descent method of the driving quantity; performing nonlinear compensation on the digital signal by adopting a digital back propagation algorithm to obtain a nonlinear compensation signal; carrying out carrier phase recovery processing by adopting a blind phase search algorithm to obtain a phase recovery signal; calculating a mean square error value of the blind estimation of the current iteration according to the phase recovery signal; judging whether a difference value between the mean square error value of the blind estimation and the mean square error value of the blind estimation of the previous iteration is greater than a set threshold value or not; if so, adding one to the number of iterations, and entering the next iteration; and if not, determining the nonlinear compensation signal as the compensated signal of the received signal. According to the invention, the operand of the signal compensation process can be reduced, and the signal compensation efficiency is improved.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a signal compensation method and system for an optical fiber communication system. Background technique [0002] Optical fiber communication is a communication method in which light waves are used as information carriers and optical fibers are used as transmission media. In the optical communication system, the nonlinear distortion caused by the Kerr effect will lead to phase distortion of the signal during transmission, and the received signal must be compensated for nonlinear damage to ensure the correctness of the received signal. In the optical fiber communication system, with the increasing demand for bandwidth, the demand for communication rate and communication capacity is increasing. In order to deal with the increasingly serious nonlinear effect of optical fiber, the nonlinear compensation technology has been carefully analyzed and studied. . [0003] The tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/25H04B10/2513
CPCH04B10/25H04B10/2513
Inventor 忻向军张琦陈茜高然潘晓龙田凤田清华姚海鹏李良川王光全王瑞春胡鹏杨爱英王拥军杨雷静常欢王曦朔李姗姗
Owner BEIJING UNIV OF POSTS & TELECOMM
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