●●●●● ●●●● 信道容量 ●●0 ●●● ●●●● K I(X;Y)=∑∑Q(|k)logk pOlk k=0j=0 Op(ili i=0信道容量 1 1 1 0 0 0 ( | ) ( ; ) ( | )log ( | ) K J k K k j i i p j k I X Y Q p j k Q p j i − − − = = = =   