In an amplitude modulation system, the message signal is given by Fig.below and the carrier frequency is 1 kHz. The modulator output is SAM() = 2[b+0.5m(t)]cos wet %3D (a) Determine the average message power. (b) If b 1, determine the modulation index and the modulation power efficiency. (c) Sketch the modulated signal of part (a) in the time domain. (d) If b = 0.5, repeat parts (a) and (b). %3D m(1) -0.05 0 0.05

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Problem 4
In an amplitude modulation system, the message signal is given by Fig.below and the carrier
frequency is 1 kHz. The modulator output is
SAM() = 2[b+0.5m(t)]cos wet
(a) Determine the average message power.
(b) If b 1, determine the modulation index and the modulation power efficiency.
(c) Sketch the modulated signal of part (a) in the time domain.
(d) If b = 0.5, repeat parts (a) and (b).
m(1)
-0.05
0.05
-2+
Transcribed Image Text:Problem 4 In an amplitude modulation system, the message signal is given by Fig.below and the carrier frequency is 1 kHz. The modulator output is SAM() = 2[b+0.5m(t)]cos wet (a) Determine the average message power. (b) If b 1, determine the modulation index and the modulation power efficiency. (c) Sketch the modulated signal of part (a) in the time domain. (d) If b = 0.5, repeat parts (a) and (b). m(1) -0.05 0.05 -2+
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