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
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.