(a) Find the minimum value of the carrier amplitude that will yield (S/N) 40 dB. (b) Find the threshold value of ac

Introductory Circuit Analysis (13th Edition)
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appropriate postdetection filtering. It is required that the output signal-
to-noise ratio be greater than 40 dB. Assume m = 1.
(a) Find the minimum value of the carrier amplitude that will yield
(S/N)
40 dB.
(b) Find the threshold value of ac.
Transcribed Image Text:appropriate postdetection filtering. It is required that the output signal- to-noise ratio be greater than 40 dB. Assume m = 1. (a) Find the minimum value of the carrier amplitude that will yield (S/N) 40 dB. (b) Find the threshold value of ac.
7.12. Assume that the baseband message signal in an AM system has a
bandwidth of 4 kHz and the amplitude distribution shown in Figure 7.20.
The AM signal is accompanied by thermal noise with a psd (ŋ/2) =
10-¹2 watt/Hz. The signal is demodulated by envelope detection and
0
fx(x)
1
Figure 7.20 Pdf of the signal for Prob-
lems 7.11., and 7.12.
Transcribed Image Text:7.12. Assume that the baseband message signal in an AM system has a bandwidth of 4 kHz and the amplitude distribution shown in Figure 7.20. The AM signal is accompanied by thermal noise with a psd (ŋ/2) = 10-¹2 watt/Hz. The signal is demodulated by envelope detection and 0 fx(x) 1 Figure 7.20 Pdf of the signal for Prob- lems 7.11., and 7.12.
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