Jian-guo Yuan,Qing-zhen Tong,Liang Xu,Sheng Huang.Construction of a new regular LDPC code for optical transmission systems[J].Optoelectronics Letters,2013,9(3):204-207 Construction of a new regular LDPC code for optical transmission systems Author Name Affiliation E-mail Jian-guo Yuan  Key Lab. of Optical Fiber Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China  yuanjg@cqupt.edu.cn  Qing-zhen Tong  Key Lab. of Optical Fiber Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China    Liang Xu  Key Lab. of Optical Fiber Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China    Sheng Huang  Key Lab. of Optical Fiber Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China    Abstract:       A novel construction method of the check matrix for the regular low density parity check (LDPC) code is proposed. The novel regular systematically constructed Gallager (SCG)-LDPC(3969,3720) code with the code rate of 93.7% and the redundancy of 6.69% is constructed. The simulation results show that the net coding gain (NCG) and the distance from the Shannon limit of the novel SCG-LDPC(3969,3720) code can respectively be improved by about 1.93 dB and 0.98 dB at the bit error rate (BER) of 10?8, compared with those of the classic RS(255,239) code in ITU-T G.975 recommendation and the LDPC(32640,30592) code in ITU-T G.975.1 recommendation with the same code rate of 93.7% and the same redundancy of 6.69%. Therefore, the proposed novel regular SCG-LDPC(3969,3720) code has excellent performance, and is more suitable for high-speed long-haul optical transmission systems. Hits: 3950 Download times: 86 View Full Text    Download reader