In this paper, we study the Gray images of the Chinese product of constacyclic and cyclic codes over a finite ring. We first introduce the Chinese product of constacyclic and cyclic codes over the finite ring. We then...In this paper, we study the Gray images of the Chinese product of constacyclic and cyclic codes over a finite ring. We first introduce the Chinese product of constacyclic and cyclic codes over the finite ring. We then define a Gray map between codes over the finite ring and a finite field. We prove that the Gray image of the Chinese product of constacyclic codes over the finite ring is a distance-invariant quasi-cyclic code over the finite field. We also prove that each code over the finite field, which is the Gray image of the Chinese product of cyclic codes over the finite ring, is permutation equivalent to a quasi-cyclic code.展开更多
利用中国剩余定理研究了环Z_k上循环码及其对偶码,其中k=（multiply from （p_i） i=1 to s）~m,p_i表示不同的素数,m是一个正整数,并且p_i不能整除码长n,给出了一个非平凡循环自对偶码存在的充要条件,得到了中国积循环码最小距离的上界...利用中国剩余定理研究了环Z_k上循环码及其对偶码,其中k=（multiply from （p_i） i=1 to s）~m,p_i表示不同的素数,m是一个正整数,并且p_i不能整除码长n,给出了一个非平凡循环自对偶码存在的充要条件,得到了中国积循环码最小距离的上界,并且确定了中国积循环码的秩和最小生成集.展开更多
基金supported by Anhui College Natural Science Research Project (KJ2013B221, 2012QRL156)Hefei Normal University General Research Project (2012kj10)Chuzhou University Research Project (2011kj002)
文摘In this paper, we study the Gray images of the Chinese product of constacyclic and cyclic codes over a finite ring. We first introduce the Chinese product of constacyclic and cyclic codes over the finite ring. We then define a Gray map between codes over the finite ring and a finite field. We prove that the Gray image of the Chinese product of constacyclic codes over the finite ring is a distance-invariant quasi-cyclic code over the finite field. We also prove that each code over the finite field, which is the Gray image of the Chinese product of cyclic codes over the finite ring, is permutation equivalent to a quasi-cyclic code.
文摘利用中国剩余定理研究了环Z_k上循环码及其对偶码,其中k=（multiply from （p_i） i=1 to s）~m,p_i表示不同的素数,m是一个正整数,并且p_i不能整除码长n,给出了一个非平凡循环自对偶码存在的充要条件,得到了中国积循环码最小距离的上界,并且确定了中国积循环码的秩和最小生成集.
