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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 modulation modulation, 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 ..... Click the link for more information. ; 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 radio radio, 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. ..... Click the link for more information. . 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. |
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The two fields are obtained by modulating the drive current for a vertical-cavity surface-emitting laser, thus generating laser sidebands separated by about 9. Lamb maintains that the separation in frequency between each of the new sidebands and its neighboring QPO is too great for it to represent frame dragging. The various Jerry Garcia sidebands started out as a supplement to his primary gig with the Grateful Dead, but this latter-day edition grew into something much bigger than just Jerry's "bar band" -- in many cities, the band was able to sell out large arenas and amphitheaters as a headliner. |
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Sidebands