The spectrum of a voice signal m(t) is zero outside the in-terval fa = |f|fp.(а)Derive an expression for the scrambler output s(t), andsketch its spectrum.(b) Show that the original voice signal m(t) may be recoveredfrom s(t) by using an unscrambler that is identical to theunit described above.

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The spectrum of a voice signal m(t) is zero outside the in- terval fa = |f|< fp. In order to ensure communication privacy, this signal is applied to a scrambler that consists of the following cas- cade of components: a product modulator, a high-pass filter, a second product modulator, and a low-pass filter. The carrier wave applied to the first product modulator has a frequency equal to fe, whereas that applied to the second product modulator has a fre-

The spectrum of a voice signal m(t) is zero outside the in- terval fa = |f|< fp. In order to ensure communication privacy, this signal is applied to a scrambler that consists of the following cas- cade of components: a product modulator, a high-pass filter, a second product modulator, and a low-pass filter. The carrier wave applied to the first product modulator has a frequency equal to fe, whereas that applied to the second product modulator has a fre-

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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