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

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Abstract

The overlap** 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 overlap** 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 overlap** 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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Authors and Affiliations

  1. School of Information Technology, ** Zeng, Jiaqiang Dong, Baojiang Wang & Dan Li

  2. Key Laboratory of Liangshan Agriculture Digital Transformation of Sichuan Provincial Education Department, ** Zeng, Jiaqiang Dong, Baojiang Wang & Dan Li

Authors
  1. Kun Zhong
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  2. Chen** Zeng
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  3. Jiaqiang Dong
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  4. Baojiang Wang
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  5. Dan Li
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Corresponding author

Correspondence to Kun Zhong.

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The authors declare no conflict of interest.

Additional information

This work has been supported by the **chang University’s New Doctoral Research Starting Program (No.YBZ202107).

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Zhong, K., Zeng, C., Dong, J. et al. Robustness analysis of O-FDE algorithm for dispersion compensation in coherent fiber optical communications. Optoelectron. Lett. 20, 289–293 (2024). https://doi.org/10.1007/s11801-024-3166-6

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  • DOI: https://doi.org/10.1007/s11801-024-3166-6

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