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

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2013,（1）
• 页码范围: 42-44
• 页数: 3页
• 语种: 英文
• DOI: 10.1007/s11801-013-2335-9

摘要

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 107.