Approximate trace reconstruction of random strings from a constant number of traces

Approximate trace reconstruction of random strings from a constant number of traces
复制标题

从恒定数量的迹线中近似重建随机字符串

DOI:
10.1109/tit.2021.3066010
复制
发表时间:
2021
影响因子:
2.5
通讯作者:
Y. Peres
Y. Peres
中科院分区:
计算机科学2区
文献类型:
--
作者:
Zachary Chase;Y. Peres

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在跟踪重建问题中,目标是通过通过删除频道通过$ x $获得的多个轨迹重建一个未知字符串的长度$ n $的$ x $。在放松的问题$近似值$ trace重建中,目标是重建$ \ widehat {x} $ $ x $的$ x $,该$ x $(在$ \ epsilon n $之内)至$ x $编辑距离。我们表明,对于大多数字符串$ x $,仅使用恒定数量的跟踪,这是可能的。至关重要的是,这种常数不会随$ n $而增长,仅取决于删除概率和$ \ epsilon $。
In the trace reconstruction problem, the goal is to reconstruct an unknown string $x$ of length $n$ from multiple traces obtained by passing $x$ through the deletion channel. In the relaxed problem of $approximate$ trace reconstruction, the goal is to reconstruct an approximation $\widehat{x}$ of $x$ which is close (within $\epsilon n$) to $x$ in edit distance. We show that for most strings $x$, this is possible with high probability using only a constant number of traces. Crucially, this constant does not grow with $n$, and only depends on the deletion probability and $\epsilon$.
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