Chinese Journal of Quantum Electronics, Volume. 41, Issue 4, 679(2024)

Carrier phase estimation of M‑QAM based on cubic spline interpolation

CHEN Rui1... LI Chuanqi1,2,*, ZHOU Shengbang1,2,**, CHEN Dong1,2, LU Ye4, LIU Zhiqiang2,3, ZENG Qian1,2 and CUI Bingqi1 |Show fewer author(s)
Author Affiliations
  • 1Guangxi Key Laboratory of Information Functional Materials and Intelligent Information Processing,Nanning Normal University, Nanning 530001, China
  • 2Smart Logistics Industry School of Nanning Normal University, Demonstrative Modern Industrial School of;Guangxi University, Nanning 530001, China
  • 3The 34th Research Institute, China Electronics Technology Group Corporation, Guilin 541004, China
  • 4College of Electronic and Information Engineering, Guangxi Normal University, Guilin 541004, China
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    Figures & Tables(9)
    Relationship between the test phase angle and the mean Euclidean distance of 16-QAM, 64-QAM and 128-QAM
    Relation curve between test phase and Euclidean distance obtained by cubic spline interpolation
    CPE algorithm flow based on cubic spline interpolation
    Experimental setup and DSP process
    16-QAM constellation before and after the CPE algorithm based on cubic spline interpolation. (a) Draw the transmitted 16-QAM constellation symbol; (b) Constellation with phase noise; (c) Laser phase noise and estimated phase noise; (d) Constellation after phase recovery
    Relationship between OSNR cost and
    Curves of optical signal-to-noise ratio and initial test phase number bit error rate under different CPE algorithms
    Relationship between bit error rate and laser linewidth (16-QAM, OSNR=16.5 dB) under different CPE algorithms
    • Table 1. Hardware complexity of various algorithms

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      Table 1. Hardware complexity of various algorithms

      AlgorithmReal multiplierReal adderComparatorDecision
      BPS6NB+4N6NB-B+2N+2BNB+N
      BPS/ML6N1B+8N2+16N1B-B+6N2BN1B+N2
      CSI6NB+4N+38B-226NB+26B+2N-132B-1NB+N
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    Rui CHEN, Chuanqi LI, Shengbang ZHOU, Dong CHEN, Ye LU, Zhiqiang LIU, Qian ZENG, Bingqi CUI. Carrier phase estimation of M‑QAM based on cubic spline interpolation[J]. Chinese Journal of Quantum Electronics, 2024, 41(4): 679

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    Paper Information

    Category:

    Received: Nov. 22, 2022

    Accepted: --

    Published Online: Jan. 8, 2025

    The Author Email: LI Chuanqi (lchq@nnnu.edu.cn), ZHOU Shengbang (Zhoushengbang@foxmail.com)

    DOI:10.3969/j.issn.1007-5461.2024.04.012

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