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arXiv 2008.08174cs.ITmath.IT
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噪声复制信道的纠错码

Error-correcting Codes for Noisy Duplication Channels

Yuanyuan Tang, Farzad Farnoud

摘要:

由于其高数据密度和寿命,DNA正在成为满足日益增长的数据存储需求的有希望的候选者。然而,与传统的存储介质相比,存储在DNA中的数据受到由数据存储管道中涉及的各种过程引起的更广泛的错误的影响。在本文中,我们考虑纠正重复错误的确切和嘈杂的串联重复一个给定的长度k。精确复制将序列的长度为k的子串的副本紧接在该子串之后,例如,ACGT到ACGACGT,其中k = 3,而噪声复制插入遭受替换噪声的拷贝,例如,ACGT到ACGATGT。具体来说,我们设计的代码,可以纠正任何数量的精确重复和一个嘈杂的重复错误,其中在嘈杂的重复的情况下,副本是在汉明距离1从原来的。我们的建设依赖于恢复存储的码字的重复根。我们的特点的方式,重复错误表现在根受影响的序列和设计有效的代码纠正这些错误模式。我们表明,建议的建设是渐近最佳的,在这个意义上说,它具有相同的渐近速率的最佳代码纠正准确的重复。

英文摘要:

Because of its high data density and longevity, DNA is emerging as a promising candidate for satisfying increasing data storage needs. Compared to conventional storage media, however, data stored in DNA is subject to a wider range of errors resulting from various processes involved in the data storage pipeline. In this paper, we consider correcting duplication errors for both exact and noisy tandem duplications of a given length k. An exact duplication inserts a copy of a substring of length k of the sequence immediately after that substring, e.g., ACGT to ACGACGT, where k = 3, while a noisy duplication inserts a copy suffering from substitution noise, e.g., ACGT to ACGATGT. Specifically, we design codes that can correct any number of exact duplication and one noisy duplication errors, where in the noisy duplication case the copy is at Hamming distance 1 from the original. Our constructions rely upon recovering the duplication root of the stored codeword. We characterize the ways in which duplication errors manifest in the root of affected sequences and design efficient codes for correcting these error patterns. We show that the proposed construction is asymptotically optimal, in the sense that it has the same asymptotic rate as optimal codes correcting exact duplications only.

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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