arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.4510cs.ITcs.DMmath.COmath.IT
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循环码和循环序列:广义Kasami情形

Cyclic Codes and Sequences: the Generalized Kasami Case

Jinquan Luo, Hongyu Wang, Yuansheng Tang

摘要:

让$q=2^n$与$n=2m$。设$1\leq k\leq n-1$和$k\neq m$。本文确定了如下指数和\[\sum\limits_{x\in \bF_q}(-1)^{\Tra_1^m (αx^{2^{m}+1})+\Tra_1^n(βx^{2^k+1})}\quad(α\in \bF_{2^m},β\in \bF_{q})\]和\[\sum\limits_{x\in \bF_q}(-1)^{\Tra_1^m (αx^{2^{m}+1})+\Tra_1^n(βx^{2^k+1}+\ga x)}\quad(α\in \bF_{2^m},β,\ga\in \bF_{q})\]的值分布,其中$\Tra_1^n: \bF_q\ra \bF_2$和$\Tra_1^m: \bF_{p^m}\ra\bF_2$是典型迹映射.作为应用:(1).本文确定了二元循环码$\cC_1$和$\cC_2$分别具有奇偶校验多项式$h_2(x)h_3(x)$和$h_1(x)h_2(x)h_3(x)$的重量分布,其中$h_1(x)$,$h_2(x)$和$h_3(x)$分别是$π^{-1}$,$π^{-(2^k+1)}$和$π^{-(2^m+1)}$在$\bF_{2}$上对$\bF_q$的本原元$π$的最小多项式.(二)、我们确定了一族m序列之间的相关分布。本文是Luo,Tang和Wang \cite{Luo Tan}的二进制版本,推广了Kasami \cite{Kasa1},Van der Vlugt \cite{Vand2}和Zeng,Liu和Hu \cite{Zen Liu}的结果.

英文摘要:

Let $q=2^n$ with $n=2m$ . Let $1\leq k\leq n-1$ and $k\neq m$. In this paper we determine the value distribution of following exponential sums \[\sum\limits_{x\in \bF_q}(-1)^{\Tra_1^m (αx^{2^{m}+1})+\Tra_1^n(βx^{2^k+1})}\quad(α\in \bF_{2^m},β\in \bF_{q})\] and \[\sum\limits_{x\in \bF_q}(-1)^{\Tra_1^m (αx^{2^{m}+1})+\Tra_1^n(βx^{2^k+1}+\ga x)}\quad(α\in \bF_{2^m},β,\ga\in \bF_{q})\] where $\Tra_1^n: \bF_q\ra \bF_2$ and $\Tra_1^m: \bF_{p^m}\ra\bF_2$ are the canonical trace mappings. As applications: (1). We determine the weight distribution of the binary cyclic codes $\cC_1$ and $\cC_2$ with parity-check polynomials $h_2(x)h_3(x)$ and $h_1(x)h_2(x)h_3(x)$ respectively where $h_1(x)$, $h_2(x)$ and $h_3(x)$ are the minimal polynomials of $π^{-1}$, $π^{-(2^k+1)}$ and $π^{-(2^m+1)}$ over $\bF_{2}$ respectively for a primitive element $π$ of $\bF_q$. (2). We determine the correlation distribution among a family of m-sequences. This paper is the binary version of Luo, Tang and Wang\cite{Luo Tan} and extends the results in Kasami\cite{Kasa1}, Van der Vlugt\cite{Vand2} and Zeng, Liu and Hu\cite{Zen Liu}.

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