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Bandpass Digital Transmission

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Presentation on theme: "Bandpass Digital Transmission"— Presentation transcript:

1 Bandpass Digital Transmission
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter Fourteen Bandpass Digital Transmission

2 Copyright © The McGraw-Hill Companies, Inc
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Binary modulated waveforms (a) ASK (b) FSK (c) PSK (d) DSB with baseband pulse shaping Figure

3 ASK power spectrum Figure 14.1-2
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ASK power spectrum Figure

4 Binary QAM (a) transmitter (b) signal constellation
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Binary QAM (a) transmitter (b) signal constellation Figure

5 PSK signal constellations (a) M=4 (b) M=8
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. PSK signal constellations (a) M=4 (b) M=8 Figure

6 Offset-keyed QPSK transmitter
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Offset-keyed QPSK transmitter Figure

7 Digital frequency modulation (a) FSK (b) continuous-phase FSK
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Digital frequency modulation (a) FSK (b) continuous-phase FSK Figure

8 Power spectrum of binc+µFSK with
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Power spectrum of binc+µFSK with Figure

9 MSK power spectrum Figure 14.1-9
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. MSK power spectrum Figure

10 Illustration of MSK. (a) phase path (b) i and q waveforms
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Illustration of MSK. (a) phase path (b) i and q waveforms Figure

11 Bandpass binary receiver
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Bandpass binary receiver Figure

12 Conditional PDFs Figure 14.2-2
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Conditional PDFs Figure

13 Copyright © The McGraw-Hill Companies, Inc
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Optimum binary detection (a) parallel matched filters (b) correlation detector Figure

14 Correlation receiver for OOK or BPSK
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Correlation receiver for OOK or BPSK Figure

15 Noncoherent OOK receiver
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Noncoherent OOK receiver Figure

16 Conditional PDFs for noncoherent OOK
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Conditional PDFs for noncoherent OOK Figure

17 Copyright © The McGraw-Hill Companies, Inc
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Binary error probability curves (a) coherent BPSK (b) DPSK (c) coherent OOK or FSK (d) noncoherent FSK (e) noncoherent OOK Figure

18 Noncoherent detection of bianry FSK
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Noncoherent detection of bianry FSK Figure

19 Quadrature-carrier receiver with correlation detectors
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Quadrature-carrier receiver with correlation detectors Figure

20 PLL system for carrier synchronization for quad-carrier receiver
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. PLL system for carrier synchronization for quad-carrier receiver Figure

21 Coherent M-ary PSK receiver
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Coherent M-ary PSK receiver Figure

22 Decision thresholds for M-ary PSK
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Decision thresholds for M-ary PSK Figure

23 Copyright © The McGraw-Hill Companies, Inc
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. M-ary PSK receiver with decision-feedback system for carrier synchronization Figure

24 Copyright © The McGraw-Hill Companies, Inc
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. M-ary QAM system (a) transmitter (b) receiver (c) square signal constellation and thresholds with M=16 Figure

25 Performance comparisons of M-ary modulation sysems with
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Performance comparisons of M-ary modulation sysems with Figure

26 PSK signal constellations (a) M=4 (b) M=8
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. PSK signal constellations (a) M=4 (b) M=8 Figure

27 Generic m/(m+1) modulator for TCM
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Generic m/(m+1) modulator for TCM Figure

28 8-ary PSK encoder for TCM (a) 4-state, (b) 8 state,
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 8-ary PSK encoder for TCM (a) 4-state, (b) 8 state, Figure

29 Partitioning of an 8-PSK signal set, Ungerbroeck, 1982
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Partitioning of an 8-PSK signal set, Ungerbroeck, 1982 Figure

30 Trellis diagram for the encoder of Fig. 14.5-3a, Ungerbroeck, 1982
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Trellis diagram for the encoder of Fig a, Ungerbroeck, 1982 Figure

31 Two possible error events for encoder of Fig. 14.5-3a.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Two possible error events for encoder of Fig a. Figure transmitted sequence most likely error event error event

32 Trellis diagram for encoder of Fig. 14.5-3b, Ungerbroeck, 1982
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Trellis diagram for encoder of Fig b, Ungerbroeck, 1982 Figure

33 Error event for encoder of Fig. 14.5-3b
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Error event for encoder of Fig b Figure transmitted sequence error event


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