5.2 Pulse amplitude modulation s(t)=Ag(t)cos2ft 5.2.1.PAM:geometric representation +A BPSK 1)Basis function:()=kog (t)=g(t)cos2 oox。MMMM where=√E2=5、The araph is "11 10” "01 MASK 00 called the 2PAM The space is of 1-d and N=1. constellation Antipodal 2)The signal vectors(points): Sm=(am） 2PAM where,d=s(d Unipolar M -=AmVE:12 4PAM -3E- 3、 UESTC-Digital transmission through the AWGN channel Prof李晓峰 19