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arXiv 1908.03804cs.ITmath.IT
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利用多块MRD码的子集构造新的子空间码

New Constructions of Subspace Codes Using Subsets of MRD codes in Several Blocks

Hao Chen, Xianmang He, Jian Weng, Liqing Xu

摘要:

常维子空间编码的一个基本问题是确定Fnq中一组k维子空间的最大可能大小A_q(n,d,k),使得对于该组中任意两个不同的子空间U和V,子空间距离满足d(U,V)≥ d。本文利用最大秩距离(MRD)码的子集在几个块中构造了两种新的常维子空间码。该方法首先应用于链接构造,然后应用于任意块的提升MRD码。在这两种构造中,秩有界的MRD码子集起着至关重要的作用。MRD码的秩分布的Delsarte定理是我们构造的等维子空间码中码字计数的重要组成部分。给出了A_q(n,d,k)的许多新的下界.构造了110多个新的常维子空间码,其性能优于已知的常维子空间码。

英文摘要:

A basic problem for the constant dimension subspace coding is to determine the maximal possible size A_q (n, d, k) of a set of k-dimensional subspaces in Fnq such that the subspace distance satisfies d(U, V )> or =d for any two different subspaces U andV in this set. We present two new constructions of constant dimension subspace codes using subsets of maximal rank-distance (MRD) codes in several blocks. This method is firstly applied to the linkage construction and secondly to arbitrary number of blocks of lifting MRD codes. In these two constructions, subsets of MRD codes with bounded ranks play an essential role. The Delsarte theorem of the rank distribution of MRD codes is an important ingredient to count codewords in our constructed constant dimension subspace codes. We give many new lower bounds for A_q (n, d, k). More than 110 new constant dimension subspace codes better than previously best known codes are constructed.

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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