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arXiv 1202.0535cs.ITcs.CCmath.IT
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从插入和删除中解码子空间代码

List decoding subspace codes from insertions and deletions

Venkatesan Guruswami, Srivatsan Narayanan, Carol Wang

摘要:

我们提出了一个建设的子空间代码以及一个有效的算法列表解码从插入和删除,处理信息理论上的最大分数,这些与多项式小的速率。我们的建设是基于一个变种的折叠Reed-Solomon码在世界上的线性多项式,该算法的灵感来自最近的线性代数方法列表解码。我们是第一个列表解码算法的子空间代码,可以处理删除,甚至一个删除可以完全扭曲的结构的基础上的子空间,因此具有挑战性的处理。当只有插入,我们还提出了结果列表解码子空间码的线性模拟里德-所罗门码(提出以前,密切相关的Gabidulin码秩度量),获得了一些改进,在以前的工作中类似的结果。

英文摘要:

We present a construction of subspace codes along with an efficient algorithm for list decoding from both insertions and deletions, handling an information-theoretically maximum fraction of these with polynomially small rate. Our construction is based on a variant of the folded Reed-Solomon codes in the world of linearized polynomials, and the algorithm is inspired by the recent linear-algebraic approach to list decoding. Ours is the first list decoding algorithm for subspace codes that can handle deletions; even one deletion can totally distort the structure of the basis of a subspace and is thus challenging to handle. When there are only insertions, we also present results for list decoding subspace codes that are the linearized analog of Reed-Solomon codes (proposed previously, and closely related to the Gabidulin codes for rank-metric), obtaining some improvements over similar results in previous work.

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