Robustness analysis of O-FDE algorithm for dispersion compensation in coherent fiber optical communications  

作　　者：ZHONG Kun ZENG Chenping DONG Jiaqiang WANG Baojiang LI Dan 

机构地区：[1]School of Information Technology,Xichang University,Xichang 615013,China [2]Key Laboratory of Liangshan Agriculture Digital Transformation of Sichuan Provincial Education Department,Xichang615013,China

出　　处：《Optoelectronics Letters》2024年第5期289-293,共5页光电子快报（英文版）

基　　金：supported by the Xichang University's New Doctoral Research Starting Program (No.YBZ202107)。

摘　　要：The overlapping frequency domain equalization(O-FDE) in digital signal processing(DSP) is frequently employed to provide dispersion compensation in long-distance coherent fiber optical communications. However, the change in overlapping symbol length that occurs during the processing of the O-FDE algorithm will typically be influenced by the decision and zero filling of the last subblock, which is harmful to the robustness of the O-FDE algorithm. In this study, with a thorough robustness analysis on changing overlapping symbol length, we present a novel method for decision and zero filling of the last subblock and examine the correspondingly resulting error vector magnitude(EVM) and symbol error ratio(SER) under different values of optical signal-to-noise ratio(OSNR), chromatic dispersion, and overlapped symbol lengths.

关 键 词：FIBER DISPERSION SYMBOL 

分 类 号：TN929.11[电子电信—通信与信息系统]