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Negacyclic codes of length 2/sup s/ over galois rings

机译:伽罗瓦环上长度为2 / sup s /的负循环码

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摘要

Codes over the ring of integers modulo 4 have been studied by many researchers. Negacyclic codes such that the length n of the code is odd have been characterized over the alphabet /spl Zopf//sub 4/, and furthermore, have been generalized to the case of the alphabet being a finite commutative chain ring. In this paper, we investigate negacyclic codes of length 2/sup s/ over Galois rings. The structure of negacyclic codes of length 2/sup s/ over the Galois rings GR(2/sup a/,m), as well as that of their duals, are completely obtained. The Hamming distances of negacyclic codes over GR(2/sup a/,m) in general, and over /spl Zopf//sub 2//sup a/ in particular are studied. Among other more general results, the Hamming distances of all negacyclic codes over /spl Zopf//sub 2//sup a/ of length 4,8, and 16 are given. The weight distributions of such negacyclic codes are also discussed.
机译:许多研究人员已经研究了模4整数环上的代码。在字母表/ spl Zopf // sub 4 /上已经表征了使得代码的长度n为奇数的负循环代码,并且已经被推广到字母表是有限的可交换链环的情况。在本文中,我们研究了Galois环上长度为2 / sup s /的负循环码。完全获得了Galois环GR(2 / sup a /,m)上长度为2 / sup s /的负循环码的结构,以及它们的对偶。通常研究了在GR(2 / sup a /,m)上,特别是在/ spl Zopf // sub 2 // sup a /上的负循环码的汉明距离。在其他更一般的结果中,给出了长度为4,8和16的/ spl Zopf // sub 2 // sup a /上所有负循环码的汉明距离。还讨论了这种负循环码的权重分布。

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