frequency spectrum


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frequency spectrum

[′frē·kwən·sē ‚spek·trəm]
(physics)
A plot of the distribution of the intensity of some type of electromagnetic or acoustic radiation as a function of frequency.
(systems engineering)
In the analysis of a random function of time, such as the amplitude of noise in a system, the limit as T approaches infinity of 1/(2π T) times the ensemble average of the squared magnitude of the amplitude of the Fourier transform of the function from -T to T. Also known as power-density spectrum; power spectrum; spectral density.
References in periodicals archive ?
9, 5th floor, Gohar Center, Wahdat Road, Lahore, to stop illegal use of frequency spectrum by the company.
Elizabeth Morin is the lead on Frequency Spectrum Encroachment issues for the Deputy Chief of Naval Operations, Fleet Readiness and Logistics.
Figures 1(a)-(c) depict the time frequency spectrum of LFM signal using Hamming window with three window length.
The frequency spectrum was calculated from the part of images with dimensions 100x100 pixels.
Illegal use of frequency spectrum may lead to imprisonment up to three (3) years or fine up to ten (10) million Rupees or both.
MTN and Vodacom, operators in South Africa welcomed the "progress made by ICASA" in terms of making frequency spectrum available.
Iftikhar Ahmed Executive Director FAB in his presentation of FAB highlighted that the Board is a sector regulator since 1951 earlier established as Pakistan Wireless Board (PWB) to regulate use of frequency spectrum, approval for sitting of radio/ wireless base stations etc and later as Frequency Allocation Board under Pakistan Telecom Act, 1996.
The meeting discussed a number of topics that aim at developing telecommunications, particularly those related to frequency spectrum.
ISLAMABAD, January 15, 2012 (Frontier Star): In order to promote regularity and competence in spectrum management and to establish a fair and transparent pricing structure, Pakistan Telecommunication Authority (PTA) has planned to rationalize frequency spectrum fees and pricing.
The European Parliament's Committee on Industry and Research unanimously adopted the report by Fiona Hall (ALDE, United Kingdom) on 11 December backing a European policy on the radio frequency spectrum.
The physics of the radio frequency spectrum mean that certain frequencies are better suited for certain applications and that interference between systems must be considered.

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