frequency domain

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frequency domain

[′frē·kwən·sē də‚mān]
(communications)
A plane on which signal strength can be represented graphically as a function of frequency, instead of a function of time.
(control systems)
Pertaining to a method of analysis, particularly useful for fixed linear systems in which one does not deal with functions of time explicitly, but with their Laplace or Fourier transforms, which are functions of frequency.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Note that much of the UHF band, a frequency space once dedicated to TV transmissions, has been switched to use by mobile phones.
Compared with traditional methods (e.g., Fourier analysis) that examine continuous and stationary periodic signals in the frequency space, CWT can detect intermittent and/or nonstationary periodicities in the time-frequency space.
The results quantified the increase in capacity compared to the corresponding TFS connections based on the full use of the allocated frequency space.
Intensity is equated to the traditional idea of power in frequency space (i.e., the power spectrum) and is a function of both time and frequency.
As shown in Figure 5, with smaller values down to 4 mm for the distance d, there is only one notching frequency centered at 9.95 GHz, and when increasing gradually the distance up to 6.4 mm two notching frequencies appear with enlarged frequency space between such two operating frequencies.
Assuming that K incident signals exist in the noise-free case, we can find K nonzero coefficients [z.sub.[theta]](t) = [s.sub.k](t) at positions corresponding to the atom [theta] = [[theta].sub.k], (k = 1, 2, ..., K, [[theta].sub.k] = [[[phi].bar].sup.q,p] = index(DOA([s.sub.k])), q = index(DFS(sk))) and zero coefficients at the remaining PQ - K; that is, the sparsity in the angle frequency space denotes that only a few atoms from the dictionary will be required to match the measurements.
Rigol Technologies Inc., Oakwood Village, Ohio, has engineered a solution to this problem in its Rigol DG4000 Series Function/Arbitrary Waveform Generators, which have the ability to create arbitrary waveforms in frequency space from the front panel.
In 1973, when the company installed the base station to handle the first public demonstration of a phone call over the cellular network, Motorola was trying to persuade the Federal Communications Commission to allocate frequency space to private companies for use in the emerging technology of cellular communications.
As shown in Figure 2(a), the data surface observed in the spatial frequency space is approximately a leaning truncated cone.
His topics include acquiring images, correcting imaging defects, processing images in frequency space, global image measurements, feature recognition and classification, and imaging surfaces.
Nenner is deeply involved in the quantitative low through high/ultra-high frequency space, from vetting incoming managers, defining requisite infrastructure to capital placement, and is currently enhancing an already highly utilized quantitative trading division at a well respected boutique firm Momentum Trading Partners, LLC in NY.

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