Problem 3: Consider the following message signal, channel filter, modulator, and demodulator. A x(t) cos(2000nt) X(f) channel filter r(t) z(t) H(f) ILPF 0 100 f cutoff=100 cos(2πfet) |H(f)| 900 1000 1100 y(t) 1 a) Carefully sketch the Fourier transforms of r(t), z(t), and y(t) assuming the receiver local oscillator is f. = 1000 Hz. Be sure to label the frequency and amplitude axes carefully. b) Notice that for f. =1000, y(t) = x(t) because of the channel filter distortion. Assuming the transmitter oscillator remains at 1000 Hz, find value for f, and A such that y(t) = x(t) for this particular message signal.

Problem 3: Consider the following message signal, channel filter, modulator, and demodulator. A x(t) cos(2000nt) X(f) channel filter r(t) z(t) H(f) ILPF 0 100 f cutoff=100 cos(2πfet) |H(f)| 900 1000 1100 y(t) 1 a) Carefully sketch the Fourier transforms of r(t), z(t), and y(t) assuming the receiver local oscillator is f. = 1000 Hz. Be sure to label the frequency and amplitude axes carefully. b) Notice that for f. =1000, y(t) = x(t) because of the channel filter distortion. Assuming the transmitter oscillator remains at 1000 Hz, find value for f, and A such that y(t) = x(t) for this particular message signal.

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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