Question

A DSB-SC modulated signal is demodulated by applying it to a coherent detector.
2
(a) Evaluate the effect of a frequency error ∆f in the local carrier frequency of the detector, measured with respect to the carrier frequency of the incoming DSBSC signal.
b) For the case of a sinusoidal modulating wave, show that because of this frequency error, the demodulated signal exhibits beats at the error frequency. Illustrate you answer

Answer 1

Answer:

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Answer 2

A good question a(a)