arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.01497cs.ITmath.IT
收藏

自对偶2-拟循环码与二面体码

Self-dual 2-quasi-cyclic Codes and Dihedral Codes

Yun Fan, Yuchang Zhang

摘要:

利用Goursat引理刻画了有限域F上2-拟循环码的结构。利用这一刻画,我们给出了2-拟循环码是二面角码的一个充分必要条件。并且得到了自对偶2-拟循环码是二面角码(当charF = 2时)或常二面角码(当charF为奇数时)的一个充要条件。因此,任何由一个元素生成的自对偶2-拟循环码必定是(常)二面角码。特别地,任何自对偶双循环码必须是(常)二面角的。同时,给出了自对偶双循环码、自对偶2-拟循环码和自对偶(常)二面体码这三类码相互重合的一个充要条件.

英文摘要:

We characterize the structure of 2-quasi-cyclic codes over a finite field F by the so-called Goursat Lemma. With the characterization, we exhibit a necessary and sufficient condition for a 2-quasi-cyclic code being a dihedral code. And we obtain a necessary and sufficient condition for a self-dual 2-quasi-cyclic code being a dihedral code (if charF = 2), or a consta-dihedral code (if charF odd). As a consequence, any self-dual 2-quasi-cyclic code generated by one element must be (consta-)dihedral. In particular, any self-dual double circulant code must be (consta-)dihedral. Also, we show a necessary and sufficient condition that the three classes (the self-dual double circulant codes, the self-dual 2-quasi-cyclic codes, and the self-dual (consta-)dihedral codes) are coincide each other.

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。

↑