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

YUAN Jian-guo; XU Liang; TONG Qing-zhen

doi:doi:10.1007/s11801-013-3102-7

光电子快报（英文版）, 2013, 9 (5): 378, Published Online: Oct. 12, 2017

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

论文大纲

YUAN Jian-guo ^*XU Liang TONG Qing-zhen

Author Affiliations

Key Lab. of Optical Fiber Communication Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Abstract

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.

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YUAN Jian-guo, XU Liang, TONG Qing-zhen. A novel QC-LDPC code based on the finite field multiplicative group for optical communications[J]. 光电子快报（英文版）, 2013, 9(5): 378.

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

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