Course No. ECE.09.433
AM and DSB-SC Modulation and Demodulation
Objectives
In this project, you will model AM and DSB-SC communications systems using
the Matlab Simulink Communications Systems Toolbox.
In both parts, you will test the system with single-tone AM (w and w/o added
Gaussian noise) and multi-tone AM signals (w/o added noise).
Software
Matlab: https://www.mathworks.com/help/pdf_doc/matlab/getstart.pdf
Matlab Communications Toolbox: https://www.mathworks.com/help/pdf_doc/comm/comm_gs.pdf
Project Requirements
The objective is to observe (in time and spectral domains) & listen as audio tones progresses along a modulation-demodulation system, both in the presence and absence of added Gaussian noise (+/- 3dB).
Develop a Matlab Simulink simulation of an AM system that includes a source, modulator, channel, demodulator and sink. Test the system with single and multi-tone audio frequency message inputs. Note down observations in the time and spectral domains, and listen to the audio signals and the input and output.
Repeat the exercise for a DSB-SC system. Bonus: Demonstrate the Quadrature-Null effect.
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