国家重点实验室 o Problem >The channel w+:U,(Y,.U poses the problem: Y1Y2 is observed by the receiver,but U1 is not observed by the receiver. >We can synthesize W+by first processing the output of W-to estimate U1.We have instead of U1 for a implementable receiver. o Implementable receiver 01=4(Y2) 02=4(Y20) >Successively decode U1,U2. 15 Problem The channel poses the problem: Y1Y2 is observed by the receiver, but U1 is not observed by the receiver. We can synthesize W+ by first processing the output of W- to estimate U1. We have instead of U1 for a implementable receiver. Implementable receiver Successively decode U1, U2. 15 2 12 1 W U YYU : (, , ) + → 1 U ˆ 2 1 1 2 22 1 ˆ ( ) ˆ ˆ ( ) U Y U YU φ φ = =