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

作　　者：Dongxu LU Xian ZHOU Yuqiang YANG Jiahao HUO Jinhui YUAN Keping LONG Changyuan YU Alan Pak Tao LAU Chao LU 

机构地区：[1]Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services,University of Science and Technology Beijing,Beijing 100083,China [2]Department of Electronic and Information Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China [3]Department of Electrical Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China

出　　处：《Science China(Information Sciences)》2021年第8期168-177,共10页中国科学（信息科学）（英文版）

基　　金：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);Foundation of Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services.

摘　　要：In this paper,the theoretical bit error rate(BER)of N-level pulse amplitude modulation(PAMN)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 SSBPAM4/16QAM 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.

关 键 词：N-level pulse amplitude modulation(PAM-N) M-ary quadrature amplitude modulation(MQAM) BER computation single-sideband(SSB) Kramers-Kronig receiver 

分 类 号：TN761[电子电信—电路与系统]