数学物理学报 ›› 1999, Vol. 19 ›› Issue (4): 368-372.

• 论文 • 上一篇    下一篇

二元码的平均Hamming距离和方差

  

  1. (南开大学数学系 |天津 300071
  • 出版日期:1999-11-01 发布日期:1999-11-01

On the average hamming distance and variance for binary codes

  1. (Department of Mathematics, Nankai University, Tianjin 300071)
  • Online:1999-11-01 Published:1999-11-01

摘要:

通过对二元n长码C的对偶距离分布的研究,在码字数为奇数的情况下,改进了Althofer-Sillke[1]和[2]文关于C的码字间平均Hamming距离及其均方差的不等式,并在码字数为2n-12n-1-1时,确定了码C的最小平均距离及其均方差的精确值.

关键词: Hamming距离, 对偶距离分布, Alth¨oferSillke不等式.

Abstract:

By using the dual distance distribution and its properties for binary code C with length n and number of codewords M, the Althofer-Sillke inequality is improved when M is odd. The exact values of minimum average Hamming distance of C are determined when M equals 2n-1 or 2n-1-1.

Key words:  Hammingdistance, Dualdistancedistribution, Alth¨oferSillkeinequality

中图分类号: 

  • 05C12,05A05,94B15