电子科技大学：《数字通信基础 Digital Communications》课程教学资源（课件讲稿，图片版）Chapter 05 Digital transmission through the AWGN channel 5.6.2 Optimal receivers and probs of err

Contents 16 Hrs ■Introduction ■（ Geometric rep.of the sig waveforms Pulse amplitude modulation 2-d signal waveforms M-d signal waveforms Opt.reception for the sig.In AWGN Optimal receivers and probs of err UESTC-Digital transmission through the AWGN channel Prof李晓峰 2

5.6 Binary Baseband: BPAM (antipodal,unipolar),Orthogonal signaling; Passband: BPSK, OOK or BASK, BFSK(Orthogonal) M-ary,1-D signaling Baseband:MPAM Passband:MASK UESTC-Digital transmission through the AWGN channel Prof李晓峰 4

5.6.2 MPAM {,an} {,an,} MPAM (Baseband) s,(t) r(I)= Recv a. s (t)+n(t) 1,2.…M0 The signals:s(t)=Ag(t) A MF-ML receiver is given by, (Oten,Am=±1，±3，.) r() Tme1 :-j店&0 E -0 1=T f(rIs) Prob of err is computed by, 卫=1-f小，h-f小s where,Ro=(-00,0]and R=[0,+0). UESTC-Digital transmission through the AWGN channel Prof李晓峰 6

5.6.2 MPAM {,an} {,an,} MPAM (Baseband) s,(t) r(0)= Recv s (t)+n(t) 1,2…Ml The signals:s(t)=Ag(t) Prob of err is computed by, (Oten,Am=±1，±3，.) Tme1 :-j店&0 =12f体h-2Mg N 2M-D0 6(log2 M)E ◆f(lsn) M M -I)No (log,M)EM k=1 3 See graph of Fig 5.55 on p315 UESTC-Digital transmission through the AWGN channel Prof李晓峰 8