5.2 Pulse amplitude modulation sn0=An8r()）cos2πft 5.2.1.PAM:geometric representation +A BPSK 1)Basis function:()=kg(t)=kg()cos2 oox。MW州 where=V√Ee=2/√Eg "11 10” "01 MASK "00 2PAM The space is of 1-d and N=1. Antipodal Note that E=g7)）cos2(2πfr)dh 2PAM =∫801-cos4nf0dh= E。 Unipolar 2 2 M 4PAM 3E- 3/ UESTC-Digital transmission through the AWGN channel Prof李晓峰 18