1. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. C H A P T E R 11 PERFORMANCE ANALYSIS OF DIGITAL COMMUNICATION SYSTEMS

2. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.1 Typical binary polar signaling and linear receiver.

3. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.2 Optimum choice for sampling instant.

4. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.3 Correlation detector.

5. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.4 Optimum binary threshold detection.

6. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.5 Realization of the optimum binary threshold detector.

7. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.6 (a) Optimum threshold detector and (b) its error probability for polar signaling.

8. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.7 Examples of orthogonal signals.

9. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.8 Digital modulated waveforms.

10. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.9 Coherent detection of digital modulated signals.

11. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.10 Optimum coherent detection of binary FSK signals.

12. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.11 (a) The minimum of the sinc function and (b) the MSK spectrum.

13. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.12 Signals and their representation in signal space.

14. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.13 Geometrical representation of a Gaussian random process.

15. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.14 M-ary communication system.

16. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.15 Effect of Gaussian channel noise on the received signal.

17. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.16 Binary communication in the presence of noise.

18. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.17 Eliminating the noise orthogonal to signal space.

19. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.18 Optimum M-ary receiver: (a) matched filter detector; (b) correlation detector.

20. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.19 Another form of optimum M-ary receiver: (a) correlator; (b) matched filter.

21. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.20 Determining optimum decision regions in a binary case.

22. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.21 Determining optimum decision regions.

23. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.22 Decision regions for the binary case in this example.

24. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.23 (a) Conditional PDFs in PAM. (b) Error probability in PAM.

25. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.24 16-ary QAM.

26. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.25 MPSK signals.

27. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.26 Error probability of MPSK.

28. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.27 Orthogonal signals.

29. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.28 Error probability of orthogonal signaling and coherent MFSK.

30. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.29 Coherent MFSK receiver.

31. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.30 Translation and rotation of coordinate axes.

32. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.31 Analysis of QPSK.