Minimum channel bandwidth of SSB signal

Q.  The modulation technique that uses the minimum channel bandwidth and transmitted power is
- Published on 12 Oct 15

a. FM
b. DSB-SC
c. VSB
d. SSB

ANSWER: SSB
 
Single Side band Transmission carries only one of the sidebands of the AM wave, which is much less than the total power required by the AM signal or the DSB-SC signal.

The total power in an AM is given by

Pt = Pc ( 1 + m2/2)

Where Pc is the carrier power and m is the modulation index.

If carrier is removed, the carrier power is also deducted and then sideband power remains.

And SSB transmission needs half the power of DSB-SC signal.

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