5.2 Pulse amplitude modulation 5.2.1.PAM:geometric representation s(t)=Augr(t) 1)Basis function:()=kog() “11” “10” where。=VEe,Eg=∫g “01” “00” 2PAM The space is of 1-d and N=1. Antipodal ● 2)The signal vectors (points):s=(a) -E. 2PAM where,ds(d Unipolar =AEs 4PAM A=1 -3E.-E E UESTC-Digital transmission through the AWGN channel Prof李晓峰 10