Question: (a) Plot the spectrum of a PAM wave produced by the modulating signal m (t) Am cos (2imt) assuming a modulation frequency m = 0.25

(a) Plot the spectrum of a PAM wave produced by the modulating signal m (t) Am cos (2iπƒmt) assuming a modulation frequency ƒm = 0.25 Hz, sampling period Ts = 1 s, and pulse duration T = 0.45 s.

(b) Using an ideal reconstruction filter, plot the spectrum of the filter output. Compare this result with the output that would be obtained if there were no aperture effect.

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a The PAM wave is st 1 um nTgtnT n The PAM wave 1 where gt is the pulse shape and m t mtAm cos2nf t ... View full answer

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