Identify the type of modulation in each case, DSBSC, DSBTC, SSBSC or PAM.
(a) The information signal is simply multiplied by a sinusoidal carrier to form the transmitted signal.
(b) The Fourier transform of the transmitted signal consists of multiple scaled replicas of the Fourier transform of the information signal at integer multiples of the carrier’s fundamental frequency.
(c) A scaled replica of the spectrum of the transmitted signal appears centered at 
with impulses also at 
where 
is the frequency of the sinusoidal carrier.
(d) Of the four modulation types, the one with the minimum bandwidth for the same information signal.
(e) The information signal can be recovered by an envelope detector.
(a) DSBSC
(b) PAM
(c) DSBTC
(d) SSBSC
(e) DSBTC
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