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arXiv cs/0409010cs.ITcs.DMmath.IT
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扩展码的距离性质

Distance properties of expander codes

Alexander Barg, Gilles Zemor

摘要:

研究了二部图上码的最小距离问题。计算了这类码的随机集合的权谱和最小距离。证明了如果顶点码具有最小距离$\ge 3$,则整个顶点码是渐近好的,并且有时满足Gilbert-Varshamov界.建设性的家庭的扩展码,其最小距离渐近超过产品的范围为0和1之间的所有码率。

英文摘要:

We study the minimum distance of codes defined on bipartite graphs. Weight spectrum and the minimum distance of a random ensemble of such codes are computed. It is shown that if the vertex codes have minimum distance $\ge 3$, the overall code is asymptotically good, and sometimes meets the Gilbert-Varshamov bound. Constructive families of expander codes are presented whose minimum distance asymptotically exceeds the product bound for all code rates between 0 and 1.

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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