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)
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LAB 2.pdf
Assignment1.pdf
PDE advanced-mathematical-techniq
E EEB434 Tutorial.pdf
O File | C:/Users/Kelekwe/Downloads/EEB434%20Tutorial.pdf
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University of Botswana
Department of Electrical Engineering
EEB 434 Communication Principles Tutorial
Question 1
i.
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 (a is a positive constant).
(a) x1(t) = 2 cos(4xt + 2x/3)
(b) х, () — ета и()
(c) x3(t) = e"u(-t)
(d) x,(t) = (a² +1?)-1/2
(e) xs(t) = e¬«le|
(f) x6 (1) = e-a u(t) – e¬a(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
d) the power in the sidebands.
1:51 PM
O Type here to search
26°C Mostly cloudy
Hi
W
11/25/2021
-
Transcribed Image Text:LAB 2.pdf Assignment1.pdf PDE advanced-mathematical-techniq E EEB434 Tutorial.pdf O File | C:/Users/Kelekwe/Downloads/EEB434%20Tutorial.pdf ... O Page view A Read aloud T Add text V Draw - Highlight O Erase of 2 University of Botswana Department of Electrical Engineering EEB 434 Communication Principles Tutorial Question 1 i. 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 (a is a positive constant). (a) x1(t) = 2 cos(4xt + 2x/3) (b) х, () — ета и() (c) x3(t) = e"u(-t) (d) x,(t) = (a² +1?)-1/2 (e) xs(t) = e¬«le| (f) x6 (1) = e-a u(t) – e¬a(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 d) the power in the sidebands. 1:51 PM O Type here to search 26°C Mostly cloudy Hi W 11/25/2021 -
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