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arXiv 0804.0996cs.ITmath.IT
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编织图码的渐近性能及实例

Woven Graph Codes: Asymptotic Performances and Examples

Irina E. Bocharova, Rolf Johannesson, Boris D. Kudryashov, Victor V. Zyablov

摘要:

研究了基于组成块和卷积码的编织图码的构造。结果表明,在基于$s$ -有部、$s$ -一致超图的随机码系综中,存在最小距离和自由距离分别满足Varshamov-Gilbert(VG)和Costello下界的码,其中$s$仅依赖于码率.正则二部图和咬尾码之间的连接。给出了编织图代码的一些示例。其中,给出了一个基于Heawood二分图的含$d_{\rm free}=32$的速率$R_{\rm wg}=1/3$编织图码的例子,该编织图码包含具有总约束长度$ν^{c}=5$的$n=7$组成速率$R^{c}=2/3$卷积码.提出了一种复杂度与组成码的个数及其总约束长度$ν^{c}$成正比的编织图码的编码方法。

英文摘要:

Constructions of woven graph codes based on constituent block and convolutional codes are studied. It is shown that within the random ensemble of such codes based on $s$-partite, $s$-uniform hypergraphs, where $s$ depends only on the code rate, there exist codes satisfying the Varshamov-Gilbert (VG) and the Costello lower bound on the minimum distance and the free distance, respectively. A connection between regular bipartite graphs and tailbiting codes is shown. Some examples of woven graph codes are presented. Among them an example of a rate $R_{\rm wg}=1/3$ woven graph code with $d_{\rm free}=32$ based on Heawood's bipartite graph and containing $n=7$ constituent rate $R^{c}=2/3$ convolutional codes with overall constraint lengths $ν^{c}=5$ is given. An encoding procedure for woven graph codes with complexity proportional to the number of constituent codes and their overall constraint length $ν^{c}$ is presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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