Spatially Coupled LDPC Codes With Small Constraint Length and Low Error Floor
Spatially Coupled LDPC Codes With Small Constraint Length and Low Error Floor
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DOI：
10.1109/lcomm.2019.2955450
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
Sima Naseri;A. Banihashemi
中科院分区：
文献类型：
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作者：
Sima Naseri;A. Banihashemi
在这封信中，我们设计了具有较小约束长度和低错误平台的时不变空间耦合低密度奇偶校验码(SC-LDPC)。为此，我们修改了文献中对于给定度分布和围长具有(接近)最小约束长度的代码，以改善它们的误差平底。这是通过消除(或最小化)一些码的主要陷阱集(TS)和/或增加最小距离来执行的。为了有效和高效地减少TSS的多重性，我们设计了一种基于TSS之间的亲子关系的技术，旨在根据TSS的危害性依次最小化TSS的多重性。
In this letter, we design time-invariant spatially coupled low-density parity-check (SC-LDPC) codes with small constraint length and low error floor. For this, we modify the codes in the literature that have (close to) minimal constraint length for a given degree distribution and girth, to improve their error floor. This is performed by eliminating (or minimizing the multiplicity of) some of the dominant trapping sets (TSs) of the codes and/or increasing the minimum distance. To reduce the multiplicity of the TSs effectively and efficiently, we devise a technique based on the parent/child relationship between TSs that aims at successively minimizing the multiplicity of TSs depending on their harmfulness.