Rate adaptive multilevel coded modulation with high coding gain in intensity modulation direct detection optical communication

被引：3

作者：

Xiao, Fei ^{[1
]}

Liu, Bo ^{[2
]}

Zhang, Lijia ^{[1
]}

Xin, Xiangjun ^{[1
]}

Zhang, Qi ^{[1
]}

Tian, Qinghua ^{[1
]}

Tian, Feng ^{[2
]}

Wang, Yongjun ^{[1
]}

Rao, Lan ^{[1
]}

Ullah, Rahat ^{[2
]}

Zhao, Feng ^{[3
]}

Li, Deng'ao ^{[4
]}

机构：

[1] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing Key Lab Space Ground Interconnect & Conve, Beijing, Peoples R China

[2] Nanjing Univ Informat Sci & Technol, Inst Optoelect, Nanjing, Jiangsu, Peoples R China

[3] Xian Univ Posts & Telecommun, Xian, Shaanxi, Peoples R China

[4] Taiyuan Univ Technol, Coll Informat Engn, Taiyuan, Peoples R China

来源：

OPTICAL ENGINEERING | 2018年 / 57卷 / 02期

关键词：

high coding gain; intensity modulation-direct detection optical communication; rate-adaptive multilevel coded modulation;

D O I：

10.1117/1.OE.57.2.026107

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A rate-adaptive multilevel coded modulation (RA-MLC) scheme based on fixed code length and a corresponding decoding scheme is proposed. RA-MLC scheme combines the multilevel coded and modulation technology with the binary linear block code at the transmitter. Bits division, coding, optional interleaving, and modulation are carried out by the preset rule, then transmitted through standard single mode fiber span equal to 100 km. The receiver improves the accuracy of decoding by means of soft information passing through different layers, which enhances the performance. Simulations are carried out in an intensity modulation-direct detection optical communication system using MATLAB (R). Results show that the RA-MLC scheme can achieve bit error rate of 1E-5 when optical signal-to-noise ratio is 20.7 dB. It also reduced the number of decoders by 72% and realized 22 rate adaptation without significantly increasing the computing time. The coding gain is increased by 7.3 dB at BER = 1E-3. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：6

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