【摘要】 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.更多还原

【Abstract】 A construction algorithm with optimized shift value of circulant permutation matrix for quasicyclic low-density parity check( QC-LDPC) codes was presented. Through analyzing the cycle relationships between the basis matrix and the check matrix,the number of short cycles was reduced and the girth of check matrix in QC-LDPC code was maximized. The simulation results show that the girth of QCLDPC codes constructed by proposed algorithm could at least extend to 6 or 8,while the number of short cycles was decreased significantly. In the end,the bit error rate performance was effectively improved.更多还原