A Variant of the EMS Decoding Algorithm for Nonbinary LDPC Codes

被引：17
|
作者：
Zhao, Shancheng [1 ]
Lu, Zhifei [1 ]
Ma, Xiao [1 ]
Bai, Baoming [2 ]
机构：
[1] Sun Yat Sen Univ, Dept ECE, Guangzhou 510275, Guangdong, Peoples R China
[2] Xidian Univ, State Key Lab ISN, Xian 710071, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2013年 / 17卷 / 08期
关键词：
Extended min-sum (EMS) algorithm; minsum (MS) algorithm; nonbinary LDPC (NB-LDPC) code; QSPA; X-EMS;
D O I：
10.1109/LCOMM.2013.070113.130806
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
This letter is concerned with low-complexity decoding algorithms for nonbinary low-density parity-check (NB-LDPC) codes. A new truncation rule based on an adaptive threshold mu is proposed for the extended min-sum (EMS) algorithm. The threshold mu is determined by the mean of the message vector. Therefore, it can be matched to channel observation and decoding iteration. The resulting algorithm is referred to as mu-EMS algorithm. Simulation results show that the mu-EMS algorithm performs almost as well as the Q-ary sum-product algorithm (QSPA). Simulation results also show that the mu-EMS algorithm is simpler than the other X-EMS algorithms for NB-LDPC over high order finite fields.
引用
收藏
页码：1640 / 1643
页数：4
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