光通信研究Issue(5)：27-28,54,3.DOI:10.13756/j.gtxyj.2016.05.008
一种高围长低复杂度LDPC码构造方法
LDPC Codes Construction with High Girth Low Complexity
摘要
Abstract
The conventional encoding method of Low Density Parity Check (LDPC)Code often cannot put the girth and nonsin-gularity of check matrices into consideration at the same time,which has negative effects on the performances of encoding and decoding,and increases the decoding complexity.A low complexity method to construct check matrices is presented.A matrix with properties of girth of 10,column weight of 2,nonsingularity,and approximate lower triangular is generated by construc-ting the sub-matrix A and sub-matrix B step by step.Due to these features,some advantages such as better decoding perform-ance,more suitable for partial response channels,lower encoding and decoding complexity are shown.The simulation result shows that the proposed coding scheme has lower complexity than the code with girth of 10.It also presents better decoding performance than common code with girth of 6 in AWGN channels after Belief Propagation(BP)decoding algorithm.关键词
低密度奇偶校验码/高围长/低复杂度/近似下三角/线性无关Key words
LDPC code/high girth/low complexity/approximate lower triangular/nonsingularity分类
信息技术与安全科学引用本文复制引用
覃远年,邹川,滕召宇,江琪..一种高围长低复杂度LDPC码构造方法[J].光通信研究,2016,(5):27-28,54,3.基金项目
国家自然科学基金资助项目(61162008) （61162008）
广西科学研究与技术开发项目(12118017-5) （12118017-5）
