sideband
sideband (n)
- plural
- sidebands
English Definitions:
sideband (Noun)
The band of frequencies each side of the frequency of a carrier wave; formed as a result of modulation of the carrier.
Sideband
In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing power as a result of the modulation process. The sidebands consist of all the Fourier components of the modulated signal except the carrier. All forms of modulation produce sidebands. Amplitude modulation of a carrier wave normally results in two mirror-image sidebands. The signal components above the carrier frequency constitute the upper sideband, and those below the carrier frequency constitute the lower sideband. In conventional AM transmission, the carrier and both sidebands are present, sometimes called double sideband amplitude modulation. In some forms of AM, the carrier may be removed, producing double sideband with suppressed carrier. An example is the stereophonic difference information transmitted in stereo FM broadcasting on a 38 kHz subcarrier. The receiver locally regenerates the subcarrier by doubling a special 19 kHz pilot tone, but in other DSB-SC systems, the carrier may be regenerated directly from the sidebands by a Costas loop or squaring loop. This is common in digital transmission systems such as BPSK where the signal is continually present.
Sideband
In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, that are the result of the modulation process. The sidebands carry the information transmitted by the radio signal. The sidebands comprise all the spectral components of the modulated signal except the carrier. The signal components above the carrier frequency constitute the upper sideband (USB), and those below the carrier frequency constitute the lower sideband (LSB). All forms of modulation produce sidebands.
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"sideband." Kamus.net. STANDS4 LLC, 2024. Web. 24 Apr. 2024. <https://www.kamus.net/english/sideband>.
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