A) Single sideband
Single sideband is also referred to as SSB. Single sideband is a way to make amplitude modulation more efficient. AM produces a modulated output signal that has twice the bandwidth of the original signal along with a carrier signal. SSB suppresses the carrier and channels all the power into one side-band. SSB signals have 16 times greater efficiency than a conventional AM signal.
Written by: NJ2X, Michael Maher