通过Fpm上长为n=pm-1的RS码得到环Fq+uFq+…+us-1Fq上的一类(1+λu)常循环MDS码.由Fpm上的扩展RS码得到该环上几类长为n=pm+1的(1+λu)常循环MDS码.并研究了当s=2时的几类长为n=pm-1和n=pm+1的循环MDS码。
A class of (1+λu)-constacyclic MDS codes over the ring Fq+uFq+…+us-1FqFq was obtained by using RS codes over Fp^m of length n=p^m-1. By extended RS codes over Fp^m, some classes of (1+λu)- constacyclic MDS codes over this ring of length n=p +1 were obtained. Some classes of cyclic MDS codes over Fp^m+uFp^m of length n=p^m-1 and n=p^m+1 were studied with s=2.