Single-sideband suppressed-carrier (SSB-SC) is a telecommunication technique, which belongs to the Amplitude modulation class.

The information represented by the modulating signal is contained in both the upper and the lower sidebands. Since each modulating frequency $f\_c$ produces corresponding upper and lower side-frequencies

$f\_c\; +\; f\_i$

and

$f\_c\; -\; f\_i$

it is not necessary to transmit both side-bands. Either one can be suppressed at the transmitter without any loss of information.

Advantages

• Less transmitter power.
• Less bandwidth, one-half that of Double-Sideband (DSB).
• Less noise at the receiver.
• Size, weight and peak antenna voltage of a single-sideband (SSB) transmitters is significantly less than that of a standard AM transmitter.

Generation

Single-sideband is obtained by selecting the wanted sideband; either Upper-Sideband (USB) or Lower-Sideband (LSB) in a Double-Sideband Suppressed-Carrier (DSB-SC) by means of a suitable band-pass filter.

See also

• Single sideband modulation