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 ?
The 5120A platform offers a single, easy-to-use instrument for the accurate measurement of single sideband (SSB) phase noise and ADEV.
This type of device is instrumental in providing immunity to vibration sidebands or microphonics.
Figure 4 shows the sideband suppression as a function of amplitude balance between I and Q while the phase balance between I and Q is a parameter.
Therefore, the phase noise sideband is only 70 - 10log100 = 50 dB below the carrier level using a 100 Hz filter bandwidth.
Two different means were used to measure the AM/PM conversion coefficient: AM with a 1 to 2 MHz sine wave modulation (-20 dB sidebands, 10 percent AM) and a single-sideband method with a single -20 dB sideband that could be varied over a 30 MHz range.
It provides superb broadband noise floor of -155 dBm/Hz, with 35 and 45 dBc carrier and sideband suppression, respectively, at a LO input power of 0 dBm.
The AM modulator is calibrated to produce precisely known AM sideband levels on the RF signal that are stable over time and temperature.
Remote access is available by using an external modem connected to the 2340 or 2370 terminal port or through SideBand management.
Contract notice: Supply / rental, Management, Communications and support and maintenance of sales terminals on board and readers / recorders iso sideband of renfe viajeros, Sme, Sa
Drawn from the proceedings of the XXII International Conference on Laser Spectroscopy (ICOL2015), held in Singapore in June and July of 2015, the eight papers in this volume discuss quantum walks with neutral atoms in state-dependent optical lattices; the role of muonic atoms in nuclear structure; the development and optimization of Doppler broadening thermometry using acetylene as a molecular target; antiferromagnetism with ultracold atoms; the generation and transfer of stable optical frequencies in optical clocks with trapped ions; precision measurement of the Newtonian gravitational constant by atom interferometry; optical sideband cooling in a Penning trap; and Bose-Einstein condensation of photons vs.
Joining the existing Gigamon Security partners that include Check Point Software Technologies, FireEye, Fortinet, Imperva and Palo Alto Networks are Datiphy, LightCyber, ManagedMethods, Niara, Pindrop Security, ProtectWise, SideBand and Tenable.
The Sideband Laptop Ensemble, a musical group that utilizes specially designed, custom-made hemispherical speakers and a fleet of laptops, will perform on Nov.