A novel QC-LDPC code based on the finite field multiplicative group for optical communications

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2013,（5）
• 页码范围: 378-380
• 页数: 3页
• 语种: 英文
• DOI: 10.1007/s11801-013-3102-7

摘要

A novel construction method of quasi-cyclic low-density parity-check (QC-LDPC) code is proposed based on the finite field multiplicative group,which has easier construction,more flexible code-length code-rate adjustment and lower encoding/decoding complexity.Moreover,a regular QC-LDPC(5334,4962) code is constructed.The simulation results show that the constructed QC-LDPC(5334,4962) code can gain better error correction performance under the condition of the additive white Gaussian noise (AWGN) channel with iterative decoding sum-product algorithm (SPA).At the bit error rate (BER) of 10-6,the net coding gain (NCG) of the constructed QC-LDPC(5334,4962) code is 1.8 dB,0.9 dB and 0.2 dB more than that of the classic RS(255,239) code in ITU-T G.975,the LDPC(32640,30592) code in ITU-T G.975.1 and the SCG-LDPC(3969,3720) code constructed by the random method,respectively.So it is more suitable for optical communication systems.