Single-sideband suppressed-carrier transmission
- Single-sideband suppressed-carrier transmission
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 produces corresponding upper and lower side-frequencies
:
and
:
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.
ee also
* Single sideband modulation
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