摘要： 基于组合设计中的循环差集，提出一种构造准循环低密度校验(Quasi-Cyclic LDPC)码的方法。所构造的正则Quasi-Cyclic LDPC码的校验矩阵中不存在长度为4的环，并且可以用简单线性移位寄存器实现编码。仿真结果表明，在和积迭代译码下，采用该方法构造的码具有较好的性能。

关键词: 循环差集, 准循环低密度奇偶校验码, 和积译码

Abstract: This paper proposes a method to construct Quasi-Cyclic Low-Density Parity-Check(QC-LDPC) codes based on Cyclic Difference Sets(CDS) of combinatory. The constructed regular QC-LDPC codes are free of 4-cycles and with low complexity shift register encoding. Simulations results show that the constructed LDPC codes perform well under sum-product decoding algorithm.

Key words: Cyclic Difference Sets(CDS), Quasi-Cyclic Low-Density Parity-Check(QC-LDPC) code, sum-product decoding

中图分类号: 

• TN911.22