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arXiv 2307.08053cs.ITmath.IT
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一些线性码的扩展码

The Extended Codes of Some Linear Codes

Zhonghua Sun, Cunsheng Ding, Tingfang Chen

AI总结:

本文引入线性码的非标准扩展码并建立一般理论,研究循环码和非二元 Hamming 码等码族的扩展码,获得四个距离最优或维数最优的线性码族,并确定多类扩展码的参数。

摘要:

扩展一个 $[n, k, d]$ 线性码 $\C$ 的经典方法是向该线性码 $\C$ 的每个码字添加一个整体奇偶校验坐标。这个扩展码记为 $\overline{\C}(-\bone)$,称为 $\C$ 的标准扩展码,是一个参数为 $[n+1, k, \bar{d}]$ 的线性码,其中 $\bar{d}=d$ 或 $\bar{d}=d+1$。这是文献中线性码的两种扩展技术之一。一些二元线性码族的标准扩展码已经得到了一定程度的研究。然而,关于非二元码的标准扩展码,已知结果并不多。例如,非二元 Hamming 码的标准扩展码的最小距离在 70 多年里仍未解决。本文的第一个目标是引入线性码的非标准扩展码,并为这类扩展线性码发展一些一般理论。第二个目标是研究若干线性码族的这类扩展码,包括循环码和非二元 Hamming 码。利用这种扩展技术获得了四个距离最优或维数最优的线性码族。本文确定了许多线性码族的某些扩展码的参数。

英文摘要:

The classical way of extending an $[n, k, d]$ linear code $\C$ is to add an overall parity-check coordinate to each codeword of the linear code $\C$. This extended code, denoted by $\overline{\C}(-\bone)$ and called the standardly extended code of $\C$, is a linear code with parameters $[n+1, k, \bar{d}]$, where $\bar{d}=d$ or $\bar{d}=d+1$. This is one of the two extending techniques for linear codes in the literature. The standardly extended codes of some families of binary linear codes have been studied to some extent. However, not much is known about the standardly extended codes of nonbinary codes. For example, the minimum distances of the standardly extended codes of the nonbinary Hamming codes remain open for over 70 years. The first objective of this paper is to introduce the nonstandardly extended codes of a linear code and develop some general theory for this type of extended linear codes. The second objective is to study this type of extended codes of a number of families of linear codes, including cyclic codes and nonbinary Hamming codes. Four families of distance-optimal or dimension-optimal linear codes are obtained with this extending technique. The parameters of certain extended codes of many families of linear codes are settled in this paper.

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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