南开大学数学系
纸质出版:1997
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[1]符方伟,沈世镒.线性拟等重码的结构分析[J].电子学报,1997(01):114-116.
符方伟, 沈世镒. Structure Analysis of Linear Quasi-Constant Weight Codes[J]. Acta Electronica Sinica, 1997, (1).
C为二元正则[n,k,d]线性拟等重码,我们证明:(1)如果n=2d,则C等价于1阶Reed-Muller码RM(k—1,1);(2)如果n≠2d,且2k-1-1为素数,则C等价于RM(k-1,1)删除第1个分量后得到的线性码RM*(k—1,1).另外,利用编码理论中著名的MacWilliams恒等式给出文[1]定理1的一个新的简洁证明.
C is a binary regular [n
k
d ] linear quasi-constant weight code. We show that(1)if n=2d
then C is equivalent to the first order Reed-Muller code RM (k - 1
1 )
(2)if n≠2d
and2k-1 - 1 is a prime number
then C is equivalent to the punctured Reed-Muller code RM* (k-1
1 )(deleting the first coordinate of RM (k - 1
1 ) ). Furthermore
we present a new simple proof for Theorem 1 in[1] by using the well known MacWilliams identity in coding theory.
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