5.4.1 Orthogonal signal waveforms FSK:un(t)=Acos[2π(f+m×△f)t] t∈[0，T],m=0,1,,M-1 The Binary example is called BFSK(or 2FSK). u(t)=Acos2πfo f=f+f/2 where, 4,()=Acos2πft 6=f6-△f12 And,f&=[f6+f]/2 The MSK is the BFSK with minimum freq separation and continuous phase. Thus, f=f。+R/4, f0=f6-R,/4 Take M=4(4FSK)a, 0 WM- UESTC-Digital transmission through the AWGN channel Prof李晓峰 9