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Theoretical analysis of PAM-N and M-QAM BER computation with single-sideband signal

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Abstract

In this paper, the theoretical bit error rate (BER) of N-level pulse amplitude modulation (PAM-N) and M-ary quadrature amplitude modulation (M-QAM) have been studied and compared under different scenarios, including (i) PAM with intensity modulation with direct detection (IM/DD) and field modulation with detection (FMD) (including coherent detection and single-sideband modulation with direct detection (SSB-DD)), and (ii) QAM with coherent detection and SSB-DD. Considering the relationship between the symbol spacing and signal-to-noise ratio (SNR), we provide the mathematical BER equations, including the optical signal-to-noise ratio (OSNR) and carrier-to-signal power ratio (CSPR), especially for PAM signals. To verify the validity of our theoretical expressions for SSB systems, transmissions with 224-Gb/s SSB-PAM4/16QAM signals using the Kramers-Kronig (KK) receiver were implemented on a unified optical system platform. The simulation results agreed well with theoretical calculations both in back-to-back (BtB) and 120-km transmission scenarios, which showed that the BER evaluation methods can serve as a theoretical guidance and system assessment criteria for SSB scenarios.

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Acknowledgements

This work was supported by National Key Research and Development Program of China (Grant No. 2019YFB1803905), National Natural Science Foundation of China (Grant Nos. 61871030, 61671053), Fundamental Research Funds for the Central Universities (Grant No. FRF-MP-19-009), State Key Laboratory of Advanced Optical Communication Systems Networks, China, Open Fund of IPOC (BUPT) (Grant No. IPOC2018B009), and Foundation of Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services.

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Authors and Affiliations

  1. Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services, University of Science and Technology Beijing, Beijing, 100083, China

    Dongxu Lu, Xian Zhou, Yuqiang Yang, Jiahao Huo, Jinhui Yuan, Keping Long & Changyuan Yu

  2. Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong, 999077, China

    Xian Zhou, Jiahao Huo, Jinhui Yuan, Changyuan Yu & Chao Lu

  3. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, 999077, China

    Alan Pak Tao Lau

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  1. Dongxu Lu
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  2. Xian Zhou
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  3. Yuqiang Yang
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  4. Jiahao Huo
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  5. Jinhui Yuan
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  7. Changyuan Yu
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  8. Alan Pak Tao Lau
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  9. Chao Lu
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Correspondence to Xian Zhou.

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Lu, D., Zhou, X., Yang, Y. et al. Theoretical analysis of PAM-N and M-QAM BER computation with single-sideband signal. Sci. China Inf. Sci. 64, 182312 (2021). https://doi.org/10.1007/s11432-020-3025-4

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  • DOI: https://doi.org/10.1007/s11432-020-3025-4

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