13 February 2018 Rate adaptive multilevel coded modulation with high coding gain in intensity modulation direct detection optical communication
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Abstract
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®. 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.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Fei Xiao, Fei Xiao, Bo Liu, Bo Liu, Lijia Zhang, Lijia Zhang, Xiangjun Xin, Xiangjun Xin, Qi Zhang, Qi Zhang, Qinghua Tian, Qinghua Tian, Feng Tian, Feng Tian, Yongjun Wang, Yongjun Wang, Lan Rao, Lan Rao, Rahat Ullah, Rahat Ullah, Feng Zhao, Feng Zhao, Dengao Li, Dengao Li, } "Rate adaptive multilevel coded modulation with high coding gain in intensity modulation direct detection optical communication," Optical Engineering 57(2), 026107 (13 February 2018). https://doi.org/10.1117/1.OE.57.2.026107 . Submission: Received: 25 September 2017; Accepted: 27 December 2017
Received: 25 September 2017; Accepted: 27 December 2017; Published: 13 February 2018
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