Question: explain Synchronous demodulation More generally, must consider phases in both modulating and demodulating signals: W 2 w(t) = cos(Wet + 0c) cos(wet+ pc)x(t) = cos

explain

Synchronous demodulation More generally, must consider phases in both modulating and demodulating signals: W 2 w(t) = cos(Wet + 0c) cos(wet+ pc)x(t) = cos ( 0c - $c) + , cos ( Rect + Oct bc) ) x (t ) cost ? with Output after the lowpass filter is Xr(t) 21 NIE cos (ec - $c)x(t) Synchronous demodulation: be = 0 - synchronize phase synchronize frequency 16 / 26

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