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arXiv 1507.08355cs.ITmath.IT
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距离大于$\frac{q}{2}$的新$q$元量子MDS码

New $q$-ary Quantum MDS Codes with Distances Bigger than $\frac{q}{2}$

Xianmang He, Liqing Xu, Hao Chen

摘要:

量子MDS码的构造已经被许多作者研究过。我们参考[3]第1482页的表格了解已知的结构。然而,对于稀疏长度$n>q+1$,只有很少的$q$元量子MDS $[[n,n-2d+2,d]]_q$码具有最小距离$d>\frac{q}{2}$。在$n=\frac{q^2-1}{m}$的情况下,其中$m|q+1$或$m|q-1$有完整的结果。在其中$m|q^2-1$不是$q-1$或$q+1$的因子的$n=\frac{q^2-1}{m}$的情况下,没有构造具有$d> \frac{q}{2}$的$q$元量子MDS码。本文提出了一种直接构造${\bf F}_{q^2}$上Hermitian自正交码的方法。在这种情况下,我们给出了一些新的$q$ -ary量子码.此外,我们还提出了许多新的长度为$\frac{w(q^2-1)}{u}$和最小距离为$d > \frac{q}{2}$的$q$元量子MDS码.

英文摘要:

Constructions of quantum MDS codes have been studied by many authors. We refer to the table in page 1482 of [3] for known constructions. However there are only few $q$-ary quantum MDS $[[n,n-2d+2,d]]_q$ codes with minimum distances $d>\frac{q}{2}$ for sparse lengths $n>q+1$. In the case $n=\frac{q^2-1}{m}$ where $m|q+1$ or $m|q-1$ there are complete results. In the case $n=\frac{q^2-1}{m}$ where $m|q^2-1$ is not a factor of $q-1$ or $q+1$, there is no $q$-ary quantum MDS code with $d> \frac{q}{2}$ has been constructed. In this paper we propose a direct approch to construct Hermitian self-orthogonal codes over ${\bf F}_{q^2}$. Thus we give some new $q$-ary quantum codes in this case. Moreover we present many new $q$-ary quantum MDS codes with lengths of the form $\frac{w(q^2-1)}{u}$ and minimum distances $d > \frac{q}{2}$.

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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