光电子快报(英文版), 2013, 9 (1): 42, Published Online: Oct. 12, 2017   

A novel concatenated code based on the improved SCG- LDPC code for optical transmission systems

Author Affiliations
Key Lab of Optical Fiber Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing400065, China
Abstract
Based on the optimization and improvement for the construction method of systematically constructed Gallager (SCG) (4, k) code, a novel SCG low density parity check (SCG-LDPC)(3969, 3720) code to be suitable for optical transmission systems is constructed. The novel SCG-LDPC (6561,6240) code with code rate of 95.1% is constructed by increasing the length of SCG-LDPC (3969,3720) code, and in a way, the code rate of LDPC codes can better meet the high requirements of optical transmission systems. And then the novel concatenated code is constructed by concatenating SCG-LDPC(6561,6240) code and BCH(127,120) code with code rate of 94.5%. The simulation results and analyses show that the net coding gain (NCG) of BCH(127,120)+SCG-LDPC(6561,6240) concatenated code is respectively 2.28 dB and 0.48 dB more than those of the classic RS(255,239) code and SCG-LDPC(6561,6240) code at the bit error rate (BER) of 10-7.

YUAN Jian-guo, XIE Ya, WANG Lin, HUANG Sheng, WANG Yong. A novel concatenated code based on the improved SCG- LDPC code for optical transmission systems[J]. 光电子快报(英文版), 2013, 9(1): 42.

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