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arXiv 1608.03027cs.ITmath.IT
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环GF(q)上三类BCH码的维数

Dimensions of three types of BCH codes over GF(q)

Hao Liu, Cunsheng Ding, Chengju Li

摘要:

BCH码已经被研究了超过50年,并且广泛地应用于消费设备、通信系统和数据存储系统中。然而,BCH码的维数仅在极少数情况下确定。本文研究了具有三种长度$n$的有限域上BCH码的维数,即$n=q^m-1$,$n=(q^m-1)/(q-1)$和$n=q^m+1$ .对于具有设计距离$δ$的狭义本原BCH码,我们研究了它们的$δ$在$1\le δ\le q^{\lceil\frac{m}{2}\rceil+1}$范围内的维数。对于非狭义本原BCH码,给出了其维数的两个一般公式,并在某些情况下给出了其维数的显式表达式。此外,我们还确定了一些本原BCH码的最小距离。我们还探讨了有限域上长度为$n=(q^m-1)/(q-1)$和$n=q^m+1$的BCH码的维数。

英文摘要:

BCH codes have been studied for over fifty years and widely employed in consumer devices, communication systems, and data storage systems. However, the dimension of BCH codes is settled only for a very small number of cases. In this paper, we study the dimensions of BCH codes over finite fields with three types of lengths $n$, namely $n=q^m-1$, $n=(q^m-1)/(q-1)$ and $n=q^m+1$. For narrow-sense primitive BCH codes with designed distance $δ$, we investigate their dimensions for $δ$ in the range $1\le δ\le q^{\lceil\frac{m}{2}\rceil+1}$. For non-narrow sense primitive BCH codes, we provide two general formulas on their dimensions and give the dimensions explicitly in some cases. Furthermore, we settle the minimum distances of some primitive BCH codes. We also explore the dimensions of the BCH codes of lengths $n=(q^m-1)/(q-1)$ and $n=q^m+1$ over finite fields.

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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