| ZHONG Kun,ZENG Chenping,DONG Jiaqiang,WANG Baojiang,LI Dan.Robustness analysis of O-FDE algorithm for dispersion compensation in coherent fiber optical communications[J].Optoelectronics Letters,2024,20(5):289-293 |
| Robustness analysis of O-FDE algorithm for dispersion compensation in coherent fiber optical communications |
| Author Name | Affiliation | | ZHONG Kun | School of Information Technology, Xichang University, Xichang 615013, China
Key Laboratory of Liangshan Agriculture Digital Transformation of Sichuan Provincial Education Department, Xichang 615013, China | | ZENG Chenping | School of Information Technology, Xichang University, Xichang 615013, China
Key Laboratory of Liangshan Agriculture Digital Transformation of Sichuan Provincial Education Department, Xichang 615013, China | | DONG Jiaqiang | School of Information Technology, Xichang University, Xichang 615013, China
Key Laboratory of Liangshan Agriculture Digital Transformation of Sichuan Provincial Education Department, Xichang 615013, China | | WANG Baojiang | School of Information Technology, Xichang University, Xichang 615013, China
Key Laboratory of Liangshan Agriculture Digital Transformation of Sichuan Provincial Education Department, Xichang 615013, China | | LI Dan | School of Information Technology, Xichang University, Xichang 615013, China
Key Laboratory of Liangshan Agriculture Digital Transformation of Sichuan Provincial Education Department, Xichang 615013, China |
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| Abstract: |
| 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. |
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