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优化循环转移矩阵偏移量的QC-LDPC码构造

DOI: 10.13190/j.jbupt.2014.01.004, PP. 16-19

Keywords: 准循环低密度奇偶校验码,基矩阵与校验矩阵之间环的关系,循环转移矩阵偏移量优化,围长

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Abstract:

提出了一种优化循环转移矩阵偏量候选集合的结构化准循环低密度奇偶校验(QC-LDPC)码构造算法.通过研究基矩阵与校验矩阵之间环的关系,达到了减少QC-LDPC码校验矩阵中短环数量和围长最大化的目的.仿真结果表明,基于该算法构造的QC-LDPC码的短环数量明显减少,围长至少可以达到6或8,误码率性能均得到了不同程度的提升.

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