Couch, Digital and Analog Communication Systems, Seventh Edition ©2007 Pearson Education, Inc. All rights reserved. 0-13-142492-0 Figure 7–1 General binary.

Couch, Digital and Analog Communication Systems, Seventh Edition ©2007 Pearson Education, Inc. All rights reserved. 0-13-142492-0

Figure 7–1 General binary communication system.


Figure 7–2 Error probability for binary signaling.


Figure 7–3 Matched-filter receiver for colored noise.


Figure 7–4 Receiver for baseband binary signaling.


Figure 7–5 Pe for matched-filter reception of several binary signalingschemes.


Figure 7–6 Receiver for bipolar signaling.


Figure 7–7 Coherent detection of OOK or BPSK signals.


Figure 7–8 Coherent detection of an FSK signal.


Figure 7–9 Noncoherent detection of OOK.


Figure 7–10 Conditional PDFs for noncoherent OOK reception.


Figure 7–11 Noncoherent detection of FSK.


Figure 7–12 Demodulation of DPSK.


Figure 7–13 Matched-filter detection of QPSK.


Figure 7–14 Comparison of the probability of bit error for several digitalsignaling schemes.


Figure 7–15 PCM communications system.


Figure 7–16 Uniform quantizer characteristic for M = 8(with n = 3 bits in each PCM word).


Figure 7–17 (S/N)out of a PCM system as a function of Pe and the numberof quantizer steps M.


Figure 7–18 Baseband system.


Figure 7–19 Coherent receiver.


Figure 7–20 Vector diagram for AM, (S/N)in ! 1.


Figure 7–21 Receiver for angle-modulated signals.


Figure 7–22 Vector diagram for angle modulation, (SN)in ! 1.


Figure 7–23 PSD for noise out of detectors for receivers of angle-modulatedsignals.


Figure 7–24 Noise performance of an FM discriminator for a sinusoidal modulatedFM signal plus Gaussian noise (no deemphasis).


Figure 7–25 FMFB receiver.


Figure 7–26 Noise performance of standard FM systems for sinusoidal modualtion.


Figure 7–27 Comparison of the noise performance of analog systems.


Figure 7–28 Solution for SA7–1 showing the effect of brickwall low-passfiltering.

(a) Unfiltered Pulse with Amplitude A = 1 and Pulse Width T = 1


Figure 7–28 (Continued)

(b) Filtered Pulse with Equivalent Bandwidth B = 1/T = 1 Hz



(c) Filtered Pulse with Equivalent Bandwidth B = 2/T = 2 Hz



(d) Filtered Pulse with Equivalent Bandwidth B = 3/T = 3 Hz


Figure 7–29 Solution for SA7–2 showing the effect of RC low-pass filtering.

(a) Unfiltered Pulse with Amplitude A = 1 and Pulse Width T = 1



(b) Filtered Pulse with Equivalent Bandwidth B = 1/T = 1 Hz



(c) Filtered Pulse with Equivalent Bandwidth B = 2/T = 2 Hz



(d) Filtered Pulse with Equivalent Bandwidth B = 3/T = 3 Hz


Figure P7–4


Figure P7–36


Figure P7–38


Figure P7–49

Couch, Digital and Analog Communication Systems, Seventh Edition ©2007 Pearson Education, Inc. All rights reserved. 0-13-142492-0 Figure 7–1 General binary.

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