Second, binary periodic sequences with good correlation properties from negacyclic Z_4~ code via Gray map are constructed. 二是由Z4-负循环码在Gray映射下的象构造出具有优良关连性质的二元周期序列族。
Using the Mattson-Solomon polynomial, we derive the generators of the duals of negacyclic codes of length p~ kn, which are over the finite ring(?)_p~ 2. And some properties of self-dual negacyclic codes are also obtained. 运用Mattson-Solomon多项式,给出了有限环(?)p~2上长度为p~kn的负循环码对偶码的生成多项式,并给出了其上自对偶负循环码的一些性质。