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More on the minimum distance of array LDPC codes
IEEE Communications Letters ( IF 4.1 ) Pub Date : 2020-03-01 , DOI: 10.1109/lcomm.2019.2957802
Haiyang Liu , Xiaopeng Jiao

Based on the extended Reed-Solomon (RS) code that has two information symbols over the field ${\mathbb F}_{q}$ , we can construct a binary regular matrix ${ {\boldsymbol{\textstyle H}}}(\gamma,\rho)$ , where $q:=2^{r}$ for some positive integer $r$ , $\gamma $ and $\rho $ are two positive integers such that $\gamma \le q$ and $\rho \le q$ . The matrix ${ {\boldsymbol{\textstyle H}}}(\gamma,\rho)$ specifies a low-density parity-check (LDPC) code ${\mathcal C}(\gamma,\rho)$ , called an RS-LDPC code. In this letter, we provide more results on the minimum distance and stopping distance of this class of codes (denoted by $d({\mathcal C}(\gamma,\rho))$ and $s({ {\boldsymbol{\textstyle H}}}(\gamma,\rho))$ ) for the case $\gamma =6$ . For $\rho =q$ , we derive an upper bound on $s({ {\boldsymbol{\textstyle H}}}(6,q))$ and $d(\mathcal {C}(6,q))$ , which is conjectured to be tight for $q\ge 32$ . For $\rho < q$ , we investigate the choices of $\rho $ such that $d(\mathcal {C}(6,\rho))$ (resp., $s({ {\boldsymbol{\textstyle H}}}(6,\rho))$ ) can be improved compared with the original $d(\mathcal {C}(6,q))$ (resp., $s({ {\boldsymbol{\textstyle H}}}(6,q))$ ).

中文翻译:

更多关于阵列 LDPC 码的最小距离

基于扩展的 Reed-Solomon (RS) 码,该码在场上具有两个信息符号 ${\mathbb F}_{q}$ ,我们可以构造一个二元正则矩阵 ${ {\boldsymbol{\textstyle H}}}(\gamma,\rho)$ , 在哪里 $q:=2^{r}$ 对于一些正整数 $r$ , $\伽马$ $\rho $ 是两个正整数,使得 $\gamma\le q$ $\rho \le q$ . 矩阵 ${ {\boldsymbol{\textstyle H}}}(\gamma,\rho)$ 指定低密度奇偶校验 (LDPC) 码 ${\mathcal C}(\gamma,\rho)$ ,称为 RS-LDPC 码。在这封信中,我们提供了关于此类代码的最小距离和停止距离的更多结果(表示为 $d({\mathcal C}(\gamma,\rho))$ $s({ {\boldsymbol{\textstyle H}}}(\gamma,\rho))$ ) 的情况 $\gamma =6$ . 为了 $\rho = q$ ,我们推导出一个上限 $s({ {\boldsymbol{\textstyle H}}}(6,q))$ $d(\mathcal {C}(6,q))$ ,这被推测为紧 $q\ge 32$ . 为了 $\rho < q$ ,我们调查了 $\rho $ 以至于 $d(\mathcal {C}(6,\rho))$ (分别, $s({ {\boldsymbol{\textstyle H}}}(6,\rho))$ ) 可以比原来有所改进 $d(\mathcal {C}(6,q))$ (分别, $s({ {\boldsymbol{\textstyle H}}}(6,q))$ )。
更新日期:2020-03-01
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