Consider a carrier signal which is amplitude modulated by a single-tone sinusoidal message signal with a modulation index of 50%. If the carrier and one of the sidebands are suppressed in the modulated signal, the percentage of power saved (rounded off o one decimal place) is

Consider a carrier signal which is amplitude modulated by a single-tone sinusoidal message signal with a modulation index of 50%. If the carrier and one of the sidebands are suppressed in the modulated signal, the percentage of power saved (rounded off o one decimal place) is

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Amplitude modulation

A radio signal can carry information in the form of sound or image for broadcasting or communication. For it to be sent to a greater distance, the signal must be changed or modulated in some way. One of the easiest way is to change the amplitude of the signal with variations of the video or the audio signal. This is called Amplitude Modulaton. In this modulation information of message is carried in amplitude of carrier signal.

Question

Consider a carrier signal which is amplitude modulated by a single-tone sinusoidal
message signal with a modulation index of 50%. If the carrier and one of the sidebands
are suppressed in the modulated signal, the percentage of power saved (rounded off
to one decimal place) is

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V:YE IC %Ov N a 46 l VOLTE moodle1.du.edu.om/mo Question 12 Not yet answered Marked out of 2.50 P Flag question Given a modulation index of 0.4 for an AM modulated signal, how much percent of the total power is carried by the carrier signal Select one: a. None b. 90 % c. 80 % d. 100 % e. 40 % Previous page Next page
In an AM modulator the message signal is m(t) = coswmit+2coswm2t, and the carrier wave is c(t) = Acosw.t. The modulation index is m = 0.5. a) Determine the amplitude of the carrier wave A. b) Determine the expression of the modulated signal with the AM modulation scheme. c) Determine the expression of the frequency spectrum of the AM modulated signal and then plot the frequency spectrum.