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The process of recovering a signal g(t) from the modulated signal g(t) cos (2лfot+00) is called demodulation. Show that the signal g(t) cos (2лfot +00) can be demodulated by multiplying it with 2 cos(2лfot+00) and passing the product through a lowpass filter of bandwidth B Hz [the bandwidth of g(t)]. Assume B

The process of recovering a signal g(t) from the modulated signal g(t) cos (2лfot+00) is called demodulation. Show that the signal g(t) cos (2лfot +00) can be demodulated by multiplying it with 2 cos(2лfot+00) and passing the product through a lowpass filter of bandwidth B Hz [the bandwidth of g(t)]. Assume B

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
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The process of recovering a signal g(t) from the modulated signal g(t) cos (2лfot+00) is called demodulation. Show that the signal g(t) cos (2лfot +00) can be demodulated by multiplying it with 2 cos(2лfot+00) and passing the product through a lowpass filter of bandwidth B Hz [the bandwidth of g(t)]. Assume B <fo. Hint: 2 cos² x=1+ cos 2x. Recognize that the spectrum of g(t) cos (4лfot +200) is centered at 2fo and will be suppressed by a lowpass filter of bandwidth B Hz.
Transcribed Image Text:The process of recovering a signal g(t) from the modulated signal g(t) cos (2лfot+00) is called demodulation. Show that the signal g(t) cos (2лfot +00) can be demodulated by multiplying it with 2 cos(2лfot+00) and passing the product through a lowpass filter of bandwidth B Hz [the bandwidth of g(t)]. Assume B <fo. Hint: 2 cos² x=1+ cos 2x. Recognize that the spectrum of g(t) cos (4лfot +200) is centered at 2fo and will be suppressed by a lowpass filter of bandwidth B Hz.
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