O Page view A Read aloud O Add text V Draw E Highlight O Erase University of Botswana Department of Electrical Engineering EEB 434 Communication Principles Tutorial Question 1 Find the normalized power for each signal below that is a power signal and the normalized energy for each signal that is an energy signal. If a signal is neither a power signal nor an energy signal, so designate it. Sketch each signal (æis a positive constant). i. (a) x(1) = 2 cos(4xt + 2x /3) (b) x2 (1) = e~" u(t) (c) x3(1) = e"u(-t) (d) x,1) = (a² +r²)-/2 (e) xs(t) = e~«| (f) x, (1) = e~«" u(1) – e~«t-1)u(t – 1) Question 2 i. A message signal is a square wave with maximum and minimum values of 8 and -8 V, respectively. The modulation index a = 0.7 and the carrier amplitude Ac= 100 V. Determine, a) The power in the sidebands b) The efficiency Question 3 i. The positive portion of the envelope of the output of an AM modulator is shown in Figure 1. The message signal is a waveform having zero DC value. Determine the, a) modulation index, b) the carrier power, c) the efficiency the power in the sidebands 1:51 PM earch 26°C Mostly cloudy ^ a 11/25/2021
O Page view A Read aloud O Add text V Draw E Highlight O Erase University of Botswana Department of Electrical Engineering EEB 434 Communication Principles Tutorial Question 1 Find the normalized power for each signal below that is a power signal and the normalized energy for each signal that is an energy signal. If a signal is neither a power signal nor an energy signal, so designate it. Sketch each signal (æis a positive constant). i. (a) x(1) = 2 cos(4xt + 2x /3) (b) x2 (1) = e~" u(t) (c) x3(1) = e"u(-t) (d) x,1) = (a² +r²)-/2 (e) xs(t) = e~«| (f) x, (1) = e~«" u(1) – e~«t-1)u(t – 1) Question 2 i. A message signal is a square wave with maximum and minimum values of 8 and -8 V, respectively. The modulation index a = 0.7 and the carrier amplitude Ac= 100 V. Determine, a) The power in the sidebands b) The efficiency Question 3 i. The positive portion of the envelope of the output of an AM modulator is shown in Figure 1. The message signal is a waveform having zero DC value. Determine the, a) modulation index, b) the carrier power, c) the efficiency the power in the sidebands 1:51 PM earch 26°C Mostly cloudy ^ a 11/25/2021
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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