适用于突发删除信道的非对称空间耦合LDPC码

发布时间：2018-02-20 21:47

本文关键词： 低密度奇偶校验码非对称空间耦合突发删除信道　出处：《西安电子科技大学学报》2017年05期 　论文类型：期刊论文

【摘要】：空间耦合低密度奇偶校验码在有记忆信道下的性能易受突发删除的影响.为改善空间耦合低密度奇偶校验码在突发删除信道下的性能,提出一种非对称空间耦合结构,该结构允许空间耦合低密度奇偶校验码的原模图中同一位置上的变量节点采用不同的耦合宽度进行耦合.根据所设计的非对称空间耦合低密度奇偶校验码的特点,分析了其基矩阵的停止集.结果显示,与原始空间耦合低密度奇偶校验码相比,非对称空间耦合低密度奇偶校验码的基矩阵不仅具有更大的跨度,还具有更大的最小停止集.因而,非对称空间耦合低密度奇偶校验码可以纠正更长的单突发删除或者更多的多突发删除.仿真结果表明,所提出的非对称空间耦合低密度奇偶校验码能够有效提升原始空间耦合低密度奇偶校验码在单突发删除信道和多突发删除信道下的性能.
[Abstract]:The performance of spatial coupled low density parity check codes in memory channels is easily affected by burst deletion. In order to improve the performance of spatial coupled low density parity check codes in burst delete channels, an asymmetric spatial coupling structure is proposed. The structure allows variable nodes at the same position in the original mode diagram of spatially coupled low-density parity codes to be coupled with different coupling widths, according to the characteristics of the asymmetric spatially coupled low-density parity check codes. The stopping set of the base matrix is analyzed. The results show that the base matrix of the asymmetric spatially coupled low density parity check code not only has a larger span than the original space coupled low density parity check code. The asymmetric spatial coupling low density parity check code can correct longer single burst deletion or more multiple burst deletion. The simulation results show that, The proposed asymmetric spatial coupling low density parity check code can effectively improve the performance of the original spatial coupled low density parity check code in single burst deleted channel and multi burst delete channel.
【作者单位】：西安电子科技大学综合业务网理论及关键技术国家重点实验室;
【基金】：国家自然科学基金资助项目(61671345)
【分类号】：TN911.22

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