Results 251 to 260 of about 3,164,796 (323)

The generalized evolutionary spectrum

IEEE Transactions on Signal Processing, 1996
Evolutionary spectral theory defines a decomposition of signal energy jointly over time and frequency by assuming that processes are composed of sinusoidal components with time-dependent amplitudes. We expand this theory by allowing time variations in the frequency of the sinusoidal components. Examples are presented illustrating the advantages of this
C.S. Detka, A. El-Jaroudi
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EXAMPLES OF THE EVOLUTIONARY SPECTRUM THEORY

Journal of Time Series Analysis, 1985
Abstract.The evolutionary spectrum theory is the most elaborated approach to the definition of the spectrum for a non‐stationary process. This paper contains examples where all the concepts of the theory are illustrated.
G. Mélard
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Variable frequency evolutionary spectrum

1995 International Conference on Acoustics, Speech, and Signal Processing, 2002
Evolutionary spectral theory provides a means for defining a decomposition of signal energy jointly over time and frequency for processes which exhibit an oscillatory behavior. The oscillatory model of behavior effectively assumes that a process is composed sinusoidal components with slowly-varying time-dependent amplitudes.
C.S. Detka, A. El-Jaroudi
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Cognitive Radio, Spectrum, and Evolutionary Heuristics

IEEE Communications Magazine, 2018
Shortage of free spectrum is a critical problem in deploying new wireless systems, and no standard frequency assignment mechanism exists for cognitive radio systems at present. In this tutorial, we treat that problem in a holistic way, as a part of solving a puzzle of selection of changeable characteristics of system devices.
R. Struzak
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IF and GD estimation from evolutionary spectrum

Signal Processing, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Şansal, M., Kayhan, A. S.
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Audio Signal Discrimination Using Evolutionary Spectrum

International Journal of Computers and Applications, 2009
In this paper, a joint-distribution algorithm, mainly, the evolutionary spectrum (ES) for audio signal discrimination is proposed and discussed. The purpose of audio signal discrimination is to build two different libraries: speech library and music library, from a stream of sounds.
A. Al-Shoshan
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Adaptive evolutionary spectrum analysis for narrow band signals

ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
This paper presents several structures for Adaptive Notch Filters and implementation aspects of constrained ARMA models. These ANF suit very well to evolutionary spectrum analysis for sinusoidal signals in additive noise. colored or white. Several estimation algorithms may be applied with these structures (ELS,RML,RIV) and some special procedures may ...
N. M'Sirdi, I. Landau
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Relating the bilinear distributions and the evolutionary spectrum

IEEE International Conference on Acoustics Speech and Signal Processing, 1993
The authors present the theoretical relationship connecting the short time Fourier transform (STFT), the class of bilinear distributions (BDs) and the evolutionary periodogram to the Wold-Cramer evolutionary spectrum. They show that the STFT and the BD can be viewed as estimators of the evolutionary spectrum, thereby allowing comparison of the various ...
C.S. Detka, A. El-Jaroudi, L.F. Chaparro
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Evolutionary cooperative spectrum sensing game: how to collaborate?

IEEE Transactions on Communications, 2010
Cooperative spectrum sensing has been shown to be able to greatly improve the sensing performance in cognitive radio networks. However, if cognitive users belong to different service providers, they tend to contribute less in sensing in order to increase their own throughput.
Beibei Wang, K.J. Ray Liu, T. Charles Clancy   +2 more
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An evolutionary spectrum assignment algorithm for Elastic Optical Networks

2013 15th International Conference on Transparent Optical Networks (ICTON), 2013
A fundamental issue in Elastic Optical Networks (EONs) relies on choosing a proper route and necessary number of contiguous frequency slots from end-to-end to accommodate the traffic demands. Spectrum assignment based on the traditional First-Fit assignment has been extensively employed in EON investigations due to its inherent simplicity and favorable
R. C. Almeida, R. A. Delgado, C. J. A. Bastos-Filho, D. A. R. Chaves, H. A. Pereira, J. F. Martins-Filho   +5 more
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