arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1808.04558cs.ITcs.DMmath.IT
收藏

利用二进制等重码显式构造距离为5和6的最佳局部可恢复码

Explicit construction of optimal locally recoverable codes of distance 5 and 6 via binary constant weight codes

Lingfei Jin

摘要:

在\cite{GXY18}中证明了距离为$d\ge 5$的$q$元线性局部可恢复码的长度$n$的上界为$O(dq^3)$ .因此,构造距离$d\ge 5$和长度接近上界的$q$元局部可恢复码是一个具有挑战性的问题.本文\cite{GXY18}还给出了$d=5$和$6$的具有局部性$r$和长度$n=Ω_r(q^2)$的$q$元局部可恢复码的算法构造,其中$Ω_r$表示隐常数依赖于局部性$r$ .本文利用二元等重码给出了距离$d= 5$和$6$的$q$元局部可恢复码的显式构造。结果表明,(i)我们的构造更简单,更明确;(ii)我们的代码的长度大于\cite{GXY18}中给出的代码。

英文摘要:

It was shown in \cite{GXY18} that the length $n$ of a $q$-ary linear locally recoverable code with distance $d\ge 5$ is upper bounded by $O(dq^3)$. Thus, it is a challenging problem to construct $q$-ary locally recoverable codes with distance $d\ge 5$ and length approaching the upper bound. The paper \cite{GXY18} also gave an algorithmic construction of $q$-ary locally recoverable codes with locality $r$ and length $n=Ω_r(q^2)$ for $d=5$ and $6$, where $Ω_r$ means that the implicit constant depends on locality $r$. In the present paper, we present an explicit construction of $q$-ary locally recoverable codes of distance $d= 5$ and $6$ via binary constant weight codes. It turns out that (i) our construction is simpler and more explicit; and (ii) lengths of our codes are larger than those given in \cite{GXY18}.

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。

↑