Some constacyclic self-dual codes over the integers modulo 2m

摘要

In this paper, we explore constacyclic self-dual codes over Z_(2m). We first characterize constacyclic self-dual codes over Z_(pm) of any length. Then we determine the structure of η-constacyclic self-dual codes over Z_(2t), where η = -1 or -1 + 2~(t-1). This structure is used to find some constacyclic self-dual codes over Z_(2m).