(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Synchronous demodulate x(t).

2. Relevant 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

3. 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 realise that I could divide x(t) by (1+m*xm(t)), but that doesn't seem to be what the problem is asking.

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# Homework Help: Cosine for synchronous demodulation

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