Minimum channel bandwidth of SSB signal

The modulation technique that uses the minimum channel bandwidth and transmitted power is

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

Correct Answer: d) SSB

Explanation:

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

P_t= P_c ( 1 + m²/2)

Where P_c 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.