●●●●● ●●●● 信道容量 ●●0 ●●● ●●●● K-1J- (X;y=∑∑gp(ik)bgx k=0j=0 ∑Qp(|i) =0 C=max /(X; r) 12kj信道容量 max ( ; ) ( | ) ( | ) ( ; ) ( | )log { } 1 0 1 0 1 0 C I X Y Q p j i p j k I X Y Q p j k Qk K k J j K i i k = =   − = − = − =