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Fast‐adaptive weighted constellation designs based on hybrid constellation shaping for long‐haul optical fiber communication systems
Author(s) -
Zhou Wenmao,
Zhang Qi,
Gao Ran,
Xin Xiangjun,
Liu Bingchun,
Wang Xishuo,
Tian Feng,
Tian Qinghua,
Sheng Xia,
Wang Yongjun,
Chang Huan,
Yang Leijing
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32846
Subject(s) - quadrature amplitude modulation , bit error rate , electronic engineering , constellation , computer science , weighting , constellation diagram , transmission (telecommunications) , optical communication , modulation (music) , communications system , algorithm , probabilistic logic , link adaptation , telecommunications , physics , engineering , fading , artificial intelligence , acoustics , decoding methods , astronomy
Abstract A novel fast‐adaptive weighted hybrid‐shaped M‐ary quadrature amplitude modulation (HS‐MQAM) format is proposed in this paper. By introducing a fast‐adaptive weighting factor array related to geometric shaping and probabilistic shaping, the non‐linear impairment is mitigated and the bit error rate (BER) and mutual information (MI) performances are further improved. The simulation results show that the proposed HS‐61QAM outperforms both geometric‐shaped 61 quadrature amplitude modulation (GS‐61QAM) and regular 64QAM, and has more obvious advantages in the long‐haul optical transmission system. For a 120‐Gb/s optical communication system over 10 × 75 km fiber transmission link, compared with GS‐61QAM and regular 64QAM, the proposed approach can achieve about 4.2 and 8 dB OSNR gain at the BER of 10 −2 , and 0.21 and 0.55 bits/symbol MI gain at the OSNR of 22 dB.