Consider a DSB-AM signal, r(t) [1 + kam(t)] cos 2 fot, where the message signal m(t) is a periodic signal shown as follows: ↑m(t) Figure 1: m(t). (1) Plot a(t) for 0

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1.
Consider a DSB-AM signal, r(t) = [1 + km(t)] cos 27 fat, where the
%3D
message signal m(t) is a periodic signal shown as follows:
↑m(t)
3
Figure 1: m(t).
(1)
Plot a(t) for 0<t < 2, with kg 0.1 and fe = 5 Hz.
(2)
Find the largest value of ka such that there is no phase reversal in
z(t).
(3)
Calculate the average power of r(t) with ka = 0.5 and fe = 100 Hz.
%3D
Transcribed Image Text:1. Consider a DSB-AM signal, r(t) = [1 + km(t)] cos 27 fat, where the %3D message signal m(t) is a periodic signal shown as follows: ↑m(t) 3 Figure 1: m(t). (1) Plot a(t) for 0<t < 2, with kg 0.1 and fe = 5 Hz. (2) Find the largest value of ka such that there is no phase reversal in z(t). (3) Calculate the average power of r(t) with ka = 0.5 and fe = 100 Hz. %3D
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