Generalized combining method for design of quasi-cyclic LDPC codes

被引：15
|
作者：
Liu, Yuanhua [1 ]
Wang, Xinmei [1 ]
Chen, Ruwei [1 ]
He, Yucheng [1 ]
机构：
[1] Xidian Univ, State Key Lab ISN, Xian 710071, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2008年 / 12卷 / 05期
基金：
中国国家自然科学基金;
关键词：
low-density parity-check codes; quasi-cyclic; circulant permutation matrix;
D O I：
10.1109/LCOMM.2008.080132
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
A generalization of the Chinese Remainder Theorem (CRT) combining method is proposed to design much more and better quasi-cyclic (QC) LDPC codes when the parity check matrices of the component codes are given. It can design a much larger class of QC-LDPC codes with similar performance by loosening the condition for determining the intermediate parameters. By permuting the block rows of the parity check matrices of the component codes, a lot of QC-LDPC codes with much less 6-cycles and better performance can be designed. At a BER of 10(-6) some QC-LDPC codes designed by the generalized combining method outperform those designed by the CRT combining method by 0.5 dB.
引用
收藏
页码：392 / 394
页数：3
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