On combining chase-2 and sum-product algorithms for LDPC codes

Authors

Sheng Tong, Xidian UniversityFollow
Huijuan Zheng, Xian University

RIS ID

79250

Publication Details

Tong, S. & Zheng, H. (2012). On combining chase-2 and sum-product algorithms for LDPC codes. ETRI Journal, 34 (4), 629-632.

Abstract

This letter investigates the combination of the Chase-2 and sum-product (SP) algorithms for low-density parity-check (LDPC) codes. A simple modification of the tanh rule for check node update is given, which incorporates test error patterns (TEPs) used in the Chase algorithm into SP decoding of LDPC codes. Moreover, a simple yet effective approach is proposed to construct TEPs for dealing with decoding failures with low-weight syndromes. Simulation results show that the proposed algorithm is effective in improving both the waterfall and error floor performance of LDPC codes.