AN ITERATIVE RELIABILITY-BASED DECODING FOR LDPC CODED MODULATION SYSTEM

被引：0
|
作者：
Huang Ping Zhao Chunming Jiang Ming(National Mobile Communication Research Lab
机构：
来源：
Journal of Electronics(China) | 2008年 / 03期
基金：
中国国家自然科学基金;
关键词：
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);
D O I：
暂无
中图分类号：
TN911.22 [信道编码理论];
学科分类号：
070104 ; 081101 ;
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.
引用
收藏
页码：289 / 293
页数：5
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