In
radio communications,
Single-SideBand modulation (
SSB) or
Single-SideBand Suppressed-Carrier (
SSB-SC) is a refinement of
amplitude modulation which uses
transmitter power and
bandwidth more efficiently. Amplitude modulation produces an output signal that has twice the bandwidth of the original
baseband signal. Single-sideband modulation avoids this bandwidth doubling, and the power wasted on a carrier, at the cost of increased device complexity and more difficult tuning at the receiver.