Two_Generalizations_for_Quadratic_Residue_Codes_over_Finite_Fields

Abstract

It's well known that the quadratic residue code over finite fields is an interesting class of cyclic codes for its higher minimum distance. Let $g$ be a positive integer and $p,p_1,\dots ,p_g$ be distinct odd primes, the present paper generalizes the constructions for the quadratic residue code with length $p$ to be the length $n=p_1\cdots p_g$, and to be the case $m$-th residue codes with length $p$ over finite fields, where $m\ge 2$ is a positive integer. Furthermore, a criterion for that these codes are self-orthogonal or complementary dual is obtained, and then the corresponding counting formula are given. In particular, the minimum distance of all 24 quaternary quadratic residue codes $[15,8]$ are determined.