Filter translation

Started by Unknown April 11, 2001

I'm using MATLAB for demodulating an amplitude modulated signal. I am
using a synchronous demodulator: I multiply the signal by exp(j*wc*t)
in phase with the signal and then I apply a low-pass.

BEFORE being demodulated, the signal passes by a transfer function
(using lsim from control toolbox).

My question: Can I translate this transfer function, putting it AFTER
the demodulation? How can I calculate my new transfer function?

thanks in advance,