sideband

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sideband,

any frequency component of a modulated carrier wave other than the frequency of the carrier wave itself, i.e., any frequency added to the carrier as a result of modulationmodulation,
in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulating wave); demodulation is the process by which the original signal is recovered from the wave
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; sidebands carry the actual information while the carrier contributes none at all. Those frequency components that are higher than the carrier frequency are know as upper sidebands; those lower are called lower sidebands. The upper and lower sidebands contain equivalent information; thus only one needs to be transmitted. Such single-sideband signals are very efficient in their use of the frequency spectrum when compared to standard amplitude modulation (AM) signals. See radioradio,
transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially to the radio receiver.
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.

sideband

[′sīd‚band]
(electromagnetism)
The frequency band located either above or below the carrier frequency, within which fall the frequency components of the wave produced by the process of modulation.
The wave components lying within such bands.

sideband

sidebandclick for a larger image
sidebandclick for a larger image
A range of frequencies occupied by the spectral components resulting from the modulation of a carrier wave by a signal. The frequency of the upper sideband is the sum of the carrier frequency and the audio frequencies used to modulate the carrier, whereas the lower sideband is the difference between the carrier frequency and the audio frequencies used to modulate the carrier.

sideband

In radio communications, a signal that results from amplitude modulating a carrier frequency. The upper sideband is the carrier plus modulation, and the lower sideband is the carrier minus modulation, which are mirror images of each other. See single sideband.
References in periodicals archive ?
At x = -500 m, the wave which is initially a monochromatic signal with frequency w = 1.4238 rad/s is being perturbed by a new pair of modulation (side bands) with frequency difference 0.2199 rad/s.
Where d is number of broken bars, [I.sub.bb,ls-1] is amplitude of first lower side band frequency and [I.sub.b] is amplitude of fundamental components.
Generally, a PHB hole consists of three parts (6), that is, a zero-phonon hole, which is a sharp hole emerging at the irradiation frequency and which is create by a photoreactive guest molecule whose zero-phonon line exists at the laser frequency; a phonon side hole, which possesses a broad hole emerging at the higher energy side of zero-phonon hole and which is created by the phonon side band of the same guest molecule that produces the zero-phonon hole; and finally a pseudo-phonon hole, which is a broad hole emerging at the lower energy side o the zero-phonon hole and which is created by molecules whose phonon side band exists at the laser frequency.
Mahanti, "Minimization of side lobe level and side band radiation of a uniformly excited time modulated linear antenna array by using artificial bee colony algorithm," Proceedings of IEEE Symposium on Industrial Electronics and Applications (ISIEA 2011), 247-250, Sep.
Josh Zee: That's just our side band. Me, Teal, and our other friend.
David Kemper, who played drums for Garcia's side band until he was fired with no explanation, summed up the Dead's and Garcia's antipathy toward producing a quality show or record time in and time out.
As well as Listen...Tanks!, his side band with producer Jacknife Lee, he is reported to be working on other musical projects as well as co-producing a film about the life of Terri Hooley, the man behind the Undertones and The Outcasts.
"We were involved in a side band called The Lovemongers, Nancy has done a lot of soundtrack work and released a solo album, and we both toured on our own.
If [V.sub.0] and [f.sub.m] are kept constant, and the VCO frequency is changed over its range from its low value to its high value, or vice versa, the side band level relative to the carrier will change.
Single side band phase noise in 1Hz bandwidth is measured relative to the carrier power at a given offset from the carrier frequency and is expressed as dBc/Hz, as illustrated in Figure 3 (Mini-Circuits models POS-1025 or JTOS-1025).