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arXiv 1804.01211math.CO
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最优Ferrers图秩度量码的构造

Constructions for optimal Ferrers diagram rank-metric codes

Shuangqing Liu, Yanxun Chang, Tao Feng

摘要:

费勒斯图中的最优秩度量码可以用来构造好的子空间码。这种代码由在某些固定位置具有零的矩阵组成。本文推广了费勒斯图秩度量(FDRM)码的已知构造。利用线性最大秩距离(MRD)码的一个判别准则,给出了一类系统MRD码的显式构造方法,并利用该方法构造了新的最优FDRM码。通过对Gabidulin码的子码的探索,建立了当费勒斯图$\cal F$中最右边的$δ-1$列至少有$n-r$点时,$\cal F$中FDRM码为最优的条件.通过引入费勒斯图的适当组合的概念,推广了已知的FDRM码的组合构造。

英文摘要:

Optimal rank-metric codes in Ferrers diagrams can be used to construct good subspace codes. Such codes consist of matrices having zeros at certain fixed positions. This paper generalizes the known constructions for Ferrers diagram rank-metric (FDRM) codes. Via a criteria for linear maximum rank distance (MRD) codes, an explicit construction for a class of systematic MRD codes is presented, which is used to produce new optimal FDRM codes. By exploring subcodes of Gabidulin codes, if each of the rightmost $δ-1$ columns in Ferrers diagram $\cal F$ has at least $n-r$ dots, where $r$ is taken in a range, then the conditions that an FDRM code in $\cal F$ is optimal are established. The known combining constructions for FDRM code are generalized by introducing the concept of proper combinations of Ferrers diagrams.

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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