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

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Presentation on theme: "Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.31 Analysis of QPSK."— Presentation transcript:

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

2 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.32 Equivalent signal sets.

3 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.33 Simplex signals.

4 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.34 Optimum M-ary receiver for nonwhite channel noise.

5 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.35 Explanation of minimax concept.

6 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.36 Noncoherent detection of digital modulated signals for ASK.

7 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.37 Conditional PDFs in the noncoherent detection of ASK signals.

8 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.38 Error probability of noncoherent ASK detection.

9 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.39 Noncoherent detection of binary FSK.

10 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.40 Error probability of noncoherent MFSK.

11 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.41 Differential PSK detection.

12 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.42 Error probability of PSK, DPSK, and coherent and noncoherent FSK.

13 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.43 Snapshot of the modulated signals from three difference pulse shapes: (a) root-raised cosine pulses, of roll off factor=0.5; (b) rectangular pulse; (c) half-sine pulse pulse.

14 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.44 BER of optimum (matched filter) detection of polar signaling using three difference pulse shapes: (a) root-raised cosine pulse of roll-off factor 0.5; (b) rectangular pulse; (c) half-sine pulse.

15 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.45 Power spectral density of the binary polar transmission using three difference pulse shapes: (a) root-raised cosine pulse of roll-off factor 0.5; (b) rectangular NRZ pulse; (c) half-sine pulse pulse.

16 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.46 Waveforms of the two pulses used in orthogonal binary signaling: solid curver, half-sine pulse; curve with circles, sine pulse.

17 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.47 Measured BER results in comparison with analytical BER.

18 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.48 Eye diagram of the real (in-phase) component of the 16-QAM transmission at the receiver matched filter output.

19 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.49 Symbol error probability of 16-QAM using root-raised cosine pulse in comparison with the analytical result.

20 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.50 Scatter plot of the matched filter output for the 16-QAM signaling with root-raised cosine pulse when E b /N = 18 dB.

21 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.51 BER from noncoherent detection of binary FSK.

22 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 11.52 Analytical BER results from noncoherent detection of binary DPSK simulation (round points).

23 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.1-3

24 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.1-4

25 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.2-7

26 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.6-5

27 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.6-6

28 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.6-12

29 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.6-13

30 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure P.11.6-14


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