Presentation - Maham Haghighat Victor Tang Peter D. Lai...

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Maham Haghighat Victor Tang Peter D. Lai
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Amplitude Modulation and Demodulation Analog signals Channel Modulation Amplitude Modulation
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Modulation
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Modulation
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Modulation
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Demodulation
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Demodulation and Recovery of the Original Signal
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Project Development - MATLAB t = linspace(0,0.0035,300); % Arbitrary linspace Fm = 4000; % Message frequency Fc = 8200; % Carrier frequency m = cos(2*pi*Fm.*t); % Message signal c = cos(2*pi*Fc.*t); % Carrier signal u = m.*c; % DSB-SC AM modulation du = u.*c; % Demodulation lpf = [omitted for presentation] s = filtfilt(lpf,1,du); % Low pass filtering
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Project Development - Assembly Carrier Signal Generation: -The differential equation: allows us to generate a sinusoidal wave -We can set the frequency of this wave by modifying the constants A and B using: where we have set B = 1 -For our specifications, we determined A = -18500 -This gives us a generated carrier frequency of 8200Hz for us to modulate
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Project Development - Assembly Modulation -We have carrier signal, and our message signal is read in from the ‘C54x’s input
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Presentation - Maham Haghighat Victor Tang Peter D. Lai...

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