5.2 Pulse amplitude modulation s(1)=Agr(t)cos2nft 5.2.1.PAM:geometric representation BPSK 1)Basis function:()=kog(t)=kg(t)cos2t oox。MMM where,=√Ee "11 MASK 00 2PAM The space is of 1-d and N=1. Antipodal 2PAM Unipolar M 4PAM E 3/E UESTC-Digital transmission through the AWGN channel Prof李晓峰 17