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Homework Statement
Synchronous demodulate x(t).
Homework Equations
xc(t) = cos(2pi*fc*t), fc is the carrier frequency
xm(t) = cos(2pi*fm*t), fm is the modulation frequency
x(t) = xc(t)*(1+m*xm(t)), m is the modulation index
m = .8
fc = 2000 hz
fm = 200 hz
The Attempt at a Solution
I really don't even know where to start. I know synchronous demodulation means I multiply x(t) by a function, but how do I come up with that function? I realize that I could divide x(t) by (1+m*xm(t)), but that doesn't seem to be what the problem is asking.