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

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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 ?
Driemeier said the university's extension division wanted to use the sidebands for closed-circuit, continuing-education programs.
The newly reported QPO frequencies occur as a sideband to the lower-frequency QPO, making them oscillations of oscillations.
The lower sidebands are at frequencies less than carrier frequency (100 Hz) and the upper sidebands are at frequencies greater than carrier frequency.
The iPass+ HD external input/output (I/O) connector includes eight sideband signals per 4x port.
DBC now transmits its data to 26,000 customers over the sidebands of 52 FM radio stations in 46 metropolitan areas in the United States and Canada and over the vertical blanking interval of four cable television networks.
When multiple signals are sent over the same fiber at different wavelengths, the sidebands, or harmonics, of the signals combine to form unwanted additional signals.
Savage provides a complete AGP 2X implementation with sidebands
May 2 /PRNewswire-FirstCall/ -- GigaBeam Corporation (BULLETIN BOARD: GGBM) announced today that it has received a purchase order from SideBand Systems Inc.
Appoints SideBand Systems as its first North American fiber-thru-the-air reseller
7 /PRNewswire/ -- A new on-line tool, SBS Link Patrol, which allows for alarming and diagnosis of any wireless communication system, was recently introduced by SideBand Systems, Inc.
The selection of SideBand Systems as an ATP partner means that SideBand is now one of twenty-one exclusive resellers of Cisco Broadband Wireless products.
Telaxis Communications Corporation (Nasdaq:TLXS), a developer of wireless fiber optic connectivity products, today announced that it has signed a distributor agreement with Sideband Systems, a leading systems integrator based near Boston, Massachusetts (www.