Why do I see no Carrier Modulation Component?
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Hi, I'm trying to simulate some amplitude modulation using an example from "The Art of Electronics (Horowitz)". the author says a data signal may be amplitude modulated with a carrier by the following:
Which by expanding the product results in three terms - the carrier and the two sidebands. I created the following matlab to test this:
y1=cos(2*pi*fm*t1); % message signal
y2=cos(2*pi*fc*t1); % carrier signal
heq = hilbert(eq);
ffteq = fft(eq);
n = length(eq);
f = (0:n-1)*(100/n);
power = abs(ffteq).^2/n;
But my fft shows only the sidebands - no carrier at all - supressed carrier modulation. How should I alter my script to show the carrier in the fft? I see MatLab has ammod function, but I cannot get that to work at all. :/ Thanks in advance.