EE311 Communication Principles
Dr. Loubar Hocine
IGEE / Fall 2023
Amplitude Modulation
(Problems)
Problem 1:
Problem 2:
b) Determine the power in the DSB-SC modulated signal
c) Determine the power in each of the sidebands.
Problem 3:
Problem 4:
a) Write the time domain expression of 𝑥̃(𝑡)
b) Which type of modulation does the signal 𝑥̃(𝑡) represent?
c) Sketch the frequency spectrum of 𝑥̃(𝑡)
d) Apply the filter graphically then obtain and sketch the frequency spectrum of 𝑥(𝑡)
e) Which type of modulation does the signal 𝑥(𝑡) represent?
f) Using the spectrum obtained in (d) write the time domain expression of 𝑥(𝑡)
g) Obtain the complex envelope mxu(t) of xu(t), where xu(t) represents the USB-SSB
signal.
h) Obtain the complex envelope mxL(t) of xL(t), where xL(t) represents the LSB-SSB
signal.
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