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Task 3: Modulation is a basic operation done in communications. It simply means that we multiply humans' voice signal by a siusoidal signal with higher frequency. The reason why we do this is that signals with different frequencies do not mix and can be separated. Therefore hundreds of people can talk on the mobile phone, at the same time in the same location. Because, each one of us has his voice signal multiplied by a different sinusoidal frequency. The modulated voice signal going out of your mobile phone is represented with a voltage signal [assuming your voice signal is sinusoidal to ease the modelling] given by v = [V. + Vmsin(@mt)]sin(w.t). Where V. = carrier amplitude or the high frequency signal, Vm = modulating signal amplitude or your voice, wc = angular frequency of the carrier and wm = angular frequency of the voice signal. a. By calculations show that: Ve (2 sin(@.t) + d x cos[(wc – Wm)t] – d x cos[(@c + Wm)t]) 2 Vm where d = (sometimes called the depth of modulation if given as a percentage).

Task 3: Modulation is a basic operation done in communications. It simply means that we multiply humans' voice signal by a siusoidal signal with higher frequency. The reason why we do this is that signals with different frequencies do not mix and can be separated. Therefore hundreds of people can talk on the mobile phone, at the same time in the same location. Because, each one of us has his voice signal multiplied by a different sinusoidal frequency. The modulated voice signal going out of your mobile phone is represented with a voltage signal [assuming your voice signal is sinusoidal to ease the modelling] given by v = [V. + Vmsin(@mt)]sin(w.t). Where V. = carrier amplitude or the high frequency signal, Vm = modulating signal amplitude or your voice, wc = angular frequency of the carrier and wm = angular frequency of the voice signal. a. By calculations show that: Ve (2 sin(@.t) + d x cos[(wc – Wm)t] – d x cos[(@c + Wm)t]) 2 Vm where d = (sometimes called the depth of modulation if given as a percentage).

Introductory Circuit Analysis (13th Edition)
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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Task 3: Modulation is a basic operation done in communications. It simply means that we multiply humans' voice signal by a siusoidal signal with higher frequency. The reason why we do this is that signals with different frequencies do not mix and can be separated. Therefore hundreds of people can talk on the mobile phone, at the same time in the same location. Because, each one of us has his voice signal multiplied by a different sinusoidal frequency. The modulated voice signal going out of your mobile phone is represented with a voltage signal [assuming your voice signal is sinusoidal to ease the modelling] given by v = [V. + Vmsin(@mt)]sin(w.t). Where V. = carrier amplitude or the high frequency signal, Vm = modulating signal amplitude or your voice, wc = angular frequency of the carrier and wm = angular frequency of the voice signal. a. By calculations show that: Ve (2 sin(@.t) + d x cos[(wc – Wm)t] – d x cos[(@c + Wm)t]) 2 Vm where d = (sometimes called the depth of modulation if given as a percentage).
Transcribed Image Text:Task 3: Modulation is a basic operation done in communications. It simply means that we multiply humans' voice signal by a siusoidal signal with higher frequency. The reason why we do this is that signals with different frequencies do not mix and can be separated. Therefore hundreds of people can talk on the mobile phone, at the same time in the same location. Because, each one of us has his voice signal multiplied by a different sinusoidal frequency. The modulated voice signal going out of your mobile phone is represented with a voltage signal [assuming your voice signal is sinusoidal to ease the modelling] given by v = [V. + Vmsin(@mt)]sin(w.t). Where V. = carrier amplitude or the high frequency signal, Vm = modulating signal amplitude or your voice, wc = angular frequency of the carrier and wm = angular frequency of the voice signal. a. By calculations show that: Ve (2 sin(@.t) + d x cos[(wc – Wm)t] – d x cos[(@c + Wm)t]) 2 Vm where d = (sometimes called the depth of modulation if given as a percentage).
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