5.6.1 Binary modulations {,an} {,an,} PSK dm s,(t) r(I)= Recv 1,0 s (t)+n(t) The signals: S1(t)= ay(t), Prob of err is computed by, So(t)=-ay(t) The constellation and likelihood functions: P=1-fh-2f小sh f(rso) f(rs) where,Ro=(-c0,0]and R=[0,+o0). Let x= r+d/2 √N。/2 1 d ML leads to a decision rule of :0 2No P= N。 0 E6=E、=a2=d/4 UESTC-Digital transmission through the AWGN channel Prof李晓峰 24