Editing Single-sideband modulation (section)

{{short description|Electronic method of transmitting information with a carrier wave}}
{{More citations needed|date=July 2015}}

[[File:SSB bandform.svg|thumb|Illustration of the spectrum of AM and SSB signals. The lower side band (LSB) spectrum is inverted compared to the baseband. As an example, a 2&nbsp;kHz audio baseband signal modulated onto a 5&nbsp;MHz carrier will produce a frequency of 5.002&nbsp;MHz if upper side band (USB) is used or 4.998&nbsp;MHz if LSB is used.]]
{{Modulation techniques}}

In [[radio]] communications, '''single-sideband modulation''' ('''SSB''') or '''single-sideband suppressed-carrier modulation''' ('''SSB-SC''') is a type of [[signal modulation]] used to transmit information, such as an [[audio signal]], by [[radio wave]]s.  A refinement of [[amplitude modulation]], it uses [[transmitter]] [[electric power|power]] and [[bandwidth (signal processing)|bandwidth]] more efficiently. Amplitude modulation produces an output signal the bandwidth of which is twice the maximum frequency of the original [[baseband]] signal. Single-sideband modulation avoids this bandwidth increase, and the power wasted on a carrier, at the cost of increased device complexity and more difficult tuning at the receiver.