Bit Loading-Based Irregular LDPC Coded-Modulation for High-Speed Optical Communications

被引：0
|
作者：
Zou, Ding [1 ]
Djordjevic, Ivan B. [1 ]
机构：
[1] Univ Arizona, Dept Elect & Comp Engn, Tucson, AZ 85719 USA
来源：
2016 18TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON) | 2016年
关键词：
fibre-optics and optical communications; low-density parity-check (LDPC); PARITY-CHECK CODES; DESIGN;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In state-of-the-art fibre-optics communication systems, the forward error correction (FEC) and high-order constellation formats are employed. It is important to approach the Shannon limit by using turbo product codes (TPC) and low-density parity-check (LDPC) codes with soft-decision decoding (SDD) algorithms. In this paper, we first study the rate-adaptive irregular LDPC coding technique in wide range of code rates enabling the flexible adjustment according to channel conditions and the simulation results show an improved SNR gain of 0.15 similar to 0.44 dB compared with regular LDPC codes under BPSK transmission. Then we propose a bit-loading rule for irregular LDPC codes combined with 16QAM and demonstrate additional 0.3 dB SNR improvements in low code rate regime, making it a viable solution for next generation high-speed optical communication systems.
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页数：4
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