basebandn.
/ˈbeɪsband/, U.S. /ˈbeɪsˌbænd/ Telecommunications.
A frequency band with a lower frequency limit close to zero; the frequency band occupied by an unmodulated signal or by a signal used for modulation. Also: a baseband system.
ΘΚΠ
society > communication > telecommunication > [noun] > signal > frequency or band of frequencies > band of frequencies
sideband1921
frequency band1922
passband1922
waveband1923
S-band1946
baseband1952
guard band1956
vestigial side band1966
1952 U.S. Patent 2,602,918 7/2 The time-modulated staircase wave is transmitted as a base band signal either to amplitude modulate a carrier, or preferably to frequency modulate a carrier for radio transmission.
1955 Brit. Patent 729,749 2/1 This range [sc. 250Hz–150kHz] of modulating signal has been termed the base band or intelligence band of frequencies.
1960 Times Rev. Industry Oct. 65/2 The overall channel characteristics [are]..fully up to agreed international standards even with basebands having as many as 2,700 channels.
1972 Sci. Amer. Sept. 138/3 Coaxial cables can carry the bit stream directly at ‘baseband’, that is, without modulation of a carrier signal.
1983 E. Trundle Beginner's Guide Videocassette Recorders ix. 184 The provision of input sockets for audio and video signals at baseband.
2004 Tele-Satellite Internat. July 14/1 The individual groups are assembled into blocks and transmitted in the baseband with 4 kHz intervals.
Compounds
C1. attributive. Designating a signal used to modulate a carrier or transmitted without a carrier.
ΚΠ
1952Base band [see main sense].
1961 E. J. Baghdady Lect. Communication Syst. Theory xix. 445 There are situations in which each of several different baseband signals (or messages) is first made to modulate the frequency of a..sinusoidal carrier.
1993 Camcorder User Mar. 15/4 While the early versions of the Spectrum..were easily amenable to extraction of a baseband video signal, later variants..are more difficult.
2006 P. J. Nahin Dr. Euler's Fabulous Formula 370 In an actual AM radio receiver the baseband signal is recovered by an incredibly simple (and cheap) circuit called an envelope detector.
C2. attributive. Designating a telecommunication system in which signals are transmitted in this way; of or relating to such a system.
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1954 U.S. Patent 2,686,256 3/2 A switching criterion based on increase of baseband noise in the pilot frequency intermodulation band will be equally responsive to modulation noise and to random noise.
1975 D. G. Fink Electronics Engineers' Handbk. xxii. 57 The signal information is transferred within the repeater..at baseband frequencies and transmitted on a radio-frequency channel.
1983 Austral. Microcomputer Mag. Aug. 57/1 Time-division multiplexing permits baseband networks to carry multiple signals.
2006 Computer Weekly 31 Jan. 36/5 The antenna is one of three main components in a digital radio, the other two being the radio front end..and the baseband processor.
This entry has been updated (OED Third Edition, September 2011; most recently modified version published online December 2021).
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n.1952