A power signal x(t) with no signal power outside the frequency range ? fc /100 < f < f c /100 is multiplied by a carrier cos(2? fct) to form a signal, yt(t). Then yt(t) is multiplied by cos(2? fct) to form yr(t). Then yr(t) is filtered by an ideal lowpass filter whose frequency response is H( f ) = 6 rect( f /2 fc ) to form yf(t). What is the ratio of the signal power in yf(t) to the signal power in 
What will be an ideal response?
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