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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 Analysis of QPSK.

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

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

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

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

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

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

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

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

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

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

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

22 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. Figure 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

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

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

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

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

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

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

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


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