Y.S.Han RS Codes 9 different ways of selecting the k-1 zero coordinates and q-1 ways of selecting the nonzero information symbols, A--g-(n-g+) The number of codewords of weight j in a q-qry (n,k) MDS code is j-dmin 4=(C)o-∑-r(: School of Electrical Engineering Intelligentization,Dongguan University of Technology Y. S. Han RS Codes 9 different ways of selecting the k − 1 zero coordinates and q − 1 ways of selecting the nonzero information symbols, An−k+1 = (q − 1)( n n − k + 1) . • The number of codewords of weight j in a q-qry (n, k) MDS code is Aj = ( n j ) (q − 1) j−∑ dmin i=0 (−1)i ( j − 1 i ) q j−dmin−i . School of Electrical Engineering & Intelligentization, Dongguan University of Technology