Chinese Control Conference (CCC)

An improved decoding algorithm based on min-max for NB-LDPC codes

Mengzhu Chen, Jin Xu, Jun Xu, Danfeng Zhao, Jiahui Meng

Published Jul 1, 2017• 0 citations

Abstract

When the code length is moderate, non-binary low-density parity-check (NB-LDPC) codes can achieve better error correcting performance than their binary counterparts at the expense of higher decoding complexity. The check node processing is a major bottleneck of NB-LDPC decoding. In this paper, Min-max decoding algorithm is proposed based on a new forward backward processing method of check nodes, select only a part of the most reliable information to the forward-backward calculation process, and change the variable nodes to check nodes (v-to-c) generation of information. Using this algorithm, a kind of code (768,1152) defined on GF(4) is simulated and compared with belief propagation in log domain (LOG-BP) decoding algorithm. Simulation results show Min-max decoding algorithm reduce information storage requirements and the computational complexity, conducive to engineering implementation.

DOI: 10.23919/chicc.2017.8029019

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