计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (35): 1-3.

• 博士论坛 • 上一篇    下一篇

pm序列与其采样序列之间的互相关性

夏永波   

  1. 中南民族大学 数学与统计学学院,武汉 430074
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-12-11 发布日期:2011-12-11

On cross-correlation between p-ary m-sequence and its decimated sequence

XIA Yongbo   

  1. School of Mathematics and Statistics,South-Central University for Nationalities,Wuhan 430074,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-12-11 Published:2011-12-11

摘要: p 是奇素数,n 为一正偶数,且满足gcd(n - 1p + 1) = 1 。令d = (pn - 1 + 1)/(p + 1) ,α 是有限域Fpn 的本原元,研究了周期为pn - 1 的p 元m 序列{tr n1 (αt)} 与其采样序列{tr n1 (αdt)} 之间的互相关性,确定了相关函数Cd (τ) 的所有可能取值,并得到了|Cd (τ) + 1| £ pn/2 + 1 的概率。当n 充分大时,该概率接近1 。

关键词: 相关函数, 指数和, p 元m 序列, 有限域

Abstract:

Let p be an odd prime and n be even positive integer with gcd(n - 1p + 1) = 1 .For d = (pn - 1 + 1)/(p + 1) ,the crosscorrelation between the p -ary m -sequence {tr n1 (αt)} and its decimated sequence {tr n1 (αdt)} is investigated,where α is the primitive element of Fpn .The possible values of the crosscorrelation function Cd (τ) are determined and the probability of|Cd (τ) + 1| £ pn/2 + 1 is also determined.When n is big enough,this probability approximates to 1 .

Key words: cross-correlation function, exponential sum, p -ary m -sequences, finite fields