8/11/2019 lab_fm
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(c) FM demodulation based on the FM-AM conversion method: For
this part you mayassume the message signal to be any time-limited
signal. You may assume the (essential)bandwidth of the message
signal to be 100 Hz. The carrier frequency can be taken to be400
Hz. The peak frequency deviation of the corresponding FM signal can
be assumed tobe 100 Hz.
i. Plot the corresponding FM signal and its magnitude
spectrum.
ii. Demodulate the FM signal by using a combination of bandpass
differentiator and anenvelope detector. Plot the corresponding
output signal after passing through the dif-ferentiator and
envelope detector respectively. Compare the final demodulated
outputsignal with that of the original message signal.
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