当 A是特殊的 (n,1,n)等重码和 (n,n,1)等重等距码时 ,通过对两个旧码 A和 B构造一个新码 A B即直和码的分析 ,给出了 A B广义 Ham ming重量与 A、B的广义 Ham ming重量的关系 ;在 A、B是一般情形下 ,对直和码的广义 Ham ming重量进行...当 A是特殊的 (n,1,n)等重码和 (n,n,1)等重等距码时 ,通过对两个旧码 A和 B构造一个新码 A B即直和码的分析 ,给出了 A B广义 Ham ming重量与 A、B的广义 Ham ming重量的关系 ;在 A、B是一般情形下 ,对直和码的广义 Ham ming重量进行了研究。展开更多
It is proved that any linear isomorphism between two linear codes which preserves a generalizedHamming weight is a monomial equivalence, which is an extension of a theorem of MacWilliams.
The generalized Hamming weights and generalized weight spectra of the protective codes from degenerate Hermitian varieties in projective spaces over finite fields are determined.
基金The first two authors were supported by the 973 Basic Research P rogram of China.
文摘It is proved that any linear isomorphism between two linear codes which preserves a generalizedHamming weight is a monomial equivalence, which is an extension of a theorem of MacWilliams.
文摘The generalized Hamming weights and generalized weight spectra of the protective codes from degenerate Hermitian varieties in projective spaces over finite fields are determined.