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arXiv 2102.02727cs.ITmath.IT
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多重交叉插入删除纠错码

Multiple Criss-Cross Insertion and Deletion Correcting Codes

Lorenz Welter, Rawad Bitar, Antonia Wachter-Zeh, Eitan Yaakobi

摘要:

研究了数组中多个交叉插入和删除的纠正问题。更确切地说,我们研究了受$t$影响的$n \times n$阵列的独特恢复-交叉缺失定义为$t_r$行和$t_c$列缺失的任何组合,使得对于给定的$t$,$t_r + t_c = t$。我们证明了纠正$t$ -交叉缺失和$t$ -交叉插入之间的等价性,并证明了纠正$t$ -交叉插入/缺失的代码至少具有$tn + t \log n - \log(t!)$的冗余。然后,我们给出了一个$t$的存在性构造--由$tn + \mathcal{O}(t^2 \log^2 n)$上界冗余的交叉插入/删除纠错码。所提出的代码结构的主要成分是系统的二进制$t$ -删除纠正码和Gabidulin码。第一个要素帮助定位插入/删除的行和列的索引,从而将插入/删除-校正问题转换为行/列擦除-校正问题,然后使用第二个要素来解决该问题。

英文摘要:

This paper investigates the problem of correcting multiple criss-cross insertions and deletions in arrays. More precisely, we study the unique recovery of $n \times n$ arrays affected by $t$-criss-cross deletions defined as any combination of $t_r$ row and $t_c$ column deletions such that $t_r + t_c = t$ for a given $t$. We show an equivalence between correcting $t$-criss-cross deletions and $t$-criss-cross insertions and show that a code correcting $t$-criss-cross insertions/deletions has redundancy at least $tn + t \log n - \log(t!)$. Then, we present an existential construction of $t$-criss-cross insertion/deletion correcting code with redundancy bounded from above by $tn + \mathcal{O}(t^2 \log^2 n)$. The main ingredients of the presented code construction are systematic binary $t$-deletion correcting codes and Gabidulin codes. The first ingredient helps locating the indices of the inserted/deleted rows and columns, thus transforming the insertion/deletion-correction problem into a row/column erasure-correction problem which is then solved using the second ingredient.

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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