American International University- Bangladesh (AIUB)
Faculty of Engineering
Semester:
Faculty:
Principles of Communications
Lab
Spring 2020-2021
Mr. Shuvra Saha
Assessment
Final term Lab Performance Test
Student Name:
Student ID:
Shaharier Kabir
19-40607-1
Dept:
Date:
25.04.2021
Time:
Course Name:
Course
Code:
Sec:
Marks:
EEE 3215
A
20
B.Sc. in E.E.E
45 mins
Question:
Consider a sinusoidal message signal of amplitude 2 V and frequency bc Hz. The message signal is amplitude
modulated by a carrier signal of amplitude 5 V and frequency bcd Hz.
Perform the following tasks in MATLAB Simulink:
(i) Design a suitable block level system to generate the AM signal.
(ii) Design a suitable block level system to reconstruct the message signal by demodulating the AM signal.
Attach the screen shots of the block diagrams and waveforms of the message signal, AM signal and
reconstructed message signal in the answer script.
**
Where a, b, c, d and e will be obtained from your student ID number as follows:
Student ID format:
xx- abcde -x
For example, if your student ID is 16-12345-2, then a = 1, b = 2, c = 3, d = 4, and e = 5
**Instructions for Upload:
Fill up your name and ID in the title page. Title page with question must
be included in the submitted file.
Upload a zip file including PDF of answer script and Simulink file in
VUES.
Solution
Generating the AM signal
Figure 1: Generating the Amplitude modulation signal
Figure 2: Time scope of AM signal
According to the block diagram, first one is the message signal. Second one is the carrier signal. Last one is the
Amplitude modulation signal
Figure 1: Amplitude modulation ans demodulation
Figure 2: Time Scope of Amplitude modulation ans demodulation
Accourding to the block diagram, first one is the real message signal. Secound one is the carrier signal. Third
one is the Amplitude modulation signal. And last one is the reconstruct the message signal by demodulating the
AM signal.