power spectrum

(redirected from power spectra)

power spectrum

A plot of the power contained in a signal versus the frequency, or of the power in a spatial distribution versus the wavenumber (reciprocal of wavelength). It may be obtained by taking a Fourier transform of the signal or distribution and squaring the amplitude of each component in the result.

power spectrum

[′pau̇·ər ‚spek·trəm]
(physics)
References in periodicals archive ?
We obtain the symmetric formulas (see appendix) which are true whatever the power spectra supports
The aerodynamic performances and sound power spectra for both Fan A and Fan B were measured experimentally.
Spectral averaging and display of power spectra -- Conventional EEG measures displayed in Tables -- Pre-test electrode impedance check -- Ergonomic touch-screen user-interface with easy to read displays -- Raw EEG waveforms displayed in real-time and playback mode -- Compact Flash storage of digitized raw waveforms and processed results
It will also provide synchronized monitoring of the WGS, generate alarms for the out-of-tolerance conditions and unauthorized accesses, missing carriers, save measurements and power spectra for retrieval and analysis, assist operators with traffic maintenance and troubleshooting, and assist net operations.
The average relative power spectra of antidepressant responders, the average relative power spectra of stimulant responders, and the average coherence spectra of anticonvulsant or lithium responders in both treatment groups are shown for comparison (Figures 2, 3, 4).
The cumulative power spectrum is estimated by summing the power spectra obtained for each sample point.
The 4-y peak coincides with both power spectra of the primary analysis (Figs.
To illustrate this last point, Figure 4 shows estimated power spectra for manufacturing shipments, new orders, and employment data based on both the series' month-to-month and year-to-year changes.
Figure 5 shows the power spectra for selected combinations of time granularity and system size.
Figure 4 presents power spectra for raw and standardized data for the number of malaria cases, mean temperature, precipitation, and dew point in Buenaventura.
Manufacturers of wireless communications products, such as cellular phones, RFIC power amplifiers, and related RF devices, use the Model 2800 RF Power Analyzer to make high speed RF power spectra measurements that are essential for economical production.