arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.04717cs.ITcs.DMmath.IT
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提升多重码

Lifted Multiplicity Codes

Lukas Holzbaur, Rina Polyanskaya, Nikita Polyanskii, Ilya Vorobyev, Eitan Yaakobi

摘要:

提升Reed-Solomon码和多重性码是两类评估码,它们允许设计可以从许多不相交集合中恢复每个码字或信息符号的高速率码。最近,基本的方法已经结合起来,以构建提升的二元多重性代码,可以进一步提高率。我们继续这些代码的研究,通过提供下限的速率和距离,从多项式中得到的任意数量的变量的提升多重代码。具体来说,我们调查的一个子码的解除多重性代码形成的线性跨度的$m$变量单项式的限制,在$\mathbb{F}_q^m$中的任意线是等价于一个低次单变量多项式。当变量数$m$固定且字母表大小$q=2^\ell$较大时,我们发现了这种单项式的分数的紧渐近行为。对于某些参数制度,解除多重性代码,然后示出有一个更好的权衡之间的冗余和不相交的恢复集的数量为每个码字或信息符号比以前已知的建设。此外,我们提出了一个局部自校正算法的提升多重码。

英文摘要:

Lifted Reed-Solomon codes and multiplicity codes are two classes of evaluation codes that allow for the design of high-rate codes that can recover every codeword or information symbol from many disjoint sets. Recently, the underlying approaches have been combined to construct lifted bi-variate multiplicity codes, that can further improve on the rate. We continue the study of these codes by providing lower bounds on the rate and distance for lifted multiplicity codes obtained from polynomials in an arbitrary number of variables. Specifically, we investigate a subcode of a lifted multiplicity code formed by the linear span of $m$-variate monomials whose restriction to an arbitrary line in $\mathbb{F}_q^m$ is equivalent to a low-degree uni-variate polynomial. We find the tight asymptotic behavior of the fraction of such monomials when the number of variables $m$ is fixed and the alphabet size $q=2^\ell$ is large. For some parameter regimes, lifted multiplicity codes are then shown to have a better trade-off between redundancy and the number of disjoint recovering sets for every codeword or information symbol than previously known constructions. Additionally, we present a local self-correction algorithm for lifted multiplicity codes.

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