AN ITERATIVE RELIABILITY-BASED DECODING FOR LDPC CODED MODULATION SYSTEM

作     者：Huang Ping Zhao Chunming Jiang Ming Huang Ping Zhao Chunming Jiang Ming(National Mobile Communication Research Lab, Southeast University, Nanjing 210096, China)(Electrical Engineering School, Hohai University, Nanjing 210098, China)

作者机构：National Mobile Communication Research Lab Southeast University Nanjing 210095 China Electrical Engineering School Hohai University Nanjing 210098 China 

出 版 物：《Journal of Electronics(China)》 (电子科学学刊（英文版）)

年 卷 期：2008年第25卷第3期

页      面：289-293页

学科分类：07[理学] 08[工学] 070104[理学-应用数学] 081101[工学-控制理论与控制工程] 0701[理学-数学] 0811[工学-控制科学与工程] 

基　　金：Supported by the National Natural Science Foundation of China (No: 60496311) 

主　　题：Low-Density Parity-Check (LDPC) codes Bit-Interleaved Coded Modulation (BICM) Belief Propagation (BP) Soft-Input Soft-Output Ordered Statistics Decoding (SISO-OSD) Log- Likelihood Ratio (LLR) 

摘      要：In this paper, A Belief Propagation concatenated Orderd-Statistic Decoder (BP-OSD) based on accumulated Log-Likelihood Ratio (LLR) is proposed for medium and short lengths Low Density Parity-Check (LDPC) codes coded Bit-Interleaved Coded Modulation (BICM) systems. The accumulated soft output values delivered by every BP iteration are used as reliability values of Soft-Input Soft-Output OSD (SISO-OSD) decoder and the soft output of SISO-OSD is used as a priori probabilities of the demodulator for the next iteration. Simulation results show that this improved algorithm achieves noticeable performance gain with only modest increase in computation complexity.