C 1
C 2
⋯
C n
A 1
h 11 k ¯
h 12 k ¯
h 1 n k ¯
A 2
h 21 k ¯
h 22 k ¯
h 2 n k ¯
⋮
A m
h m 1 k ¯
h m 2 k ¯
h m n k ¯