Results 161 to 170 of about 4,366 (193)

Relationships between two definitions of the discrete Wigner distribution and the continuous Wigner distribution

Digital Signal Processing
We present a very simple relationship between two widely used discrete-time discrete-frequency Wigner distributions. The first one is obtained through sampling and the second one is obtained from the representation theory of the finite Heisenberg group.
Sayit Korkmaz, Haldun M. Özaktas
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The Wigner distribution function

Physics Letters A, 1982
Abstract In this letter, the relationship between the characteristic function for two arbitrary noncommuting observables and a generalized Wigner distribution function is established. This distribution function is shown to have no simple interpretation in the sense of probability theory but, in lieu of its special properties, can be used directly for
G.J. Iafrate, H.L. Grubin, D.K. Ferry
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Wigner-Ville distribution and windowed Wigner-Ville distribution of noisy signals

Proceedings of IEEE Singapore International Conference on Networks/International Conference on Information Engineering '93, 2002
Wigner-Ville distribution (WVD) is a major method for analyzing non-stationary signal. In practical application of WVD, a windowed version is necessary. When signals are distorted by additive noise, it is important to estimate the accuracy of the estimator in terms of bias and variance.
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The composite pseudo Wigner distribution (CPWD): A computable and versatile approximation to the Wigner distribution (WD)

ICASSP '83. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
The Wigner distribution (WD) has recently received much attention from researchers interested in dual time/frequency or space/spatial-frequency signal representation. However, an adequate computable approximation to the WD has been lacking. In order to fill this void, we introduce in this paper a new and highly versatile approximation known as the ...
Lowell Jacobson, Harry Wechsler
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Wigner Distribution Functions

2002
A popular method to include quantum effects into the calculation of the characteristics of submicron devices is based on the Wigner functions. The underlying idea is that quantum transport can be catched into generalized transport equations that are in the spirit of the Boltzmann transport equation, suitable extended with terms that represent quantum ...
Wim Magnus, Wim Schoenmaker
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Wigner distributions for qudits

AIP Conference Proceedings, 2006
Two new approaches to the problem of setting up Wigner distributions for finite level quantum systems are proposed. Both arise by looking at the structure of the familiar Wigner distribution for Cartesian quantum mechanics from different perspectives.
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Recursion In Wigner Distribution

SPIE Proceedings, 1988
The problem of finding a recursive structure to evaluate the Wigner distribution (WD) is investigated. Recursive formula for updating the smoothed Wigner distribution are derived for on-line data processing of non-stationary processes. Recursion is established by first defining a sliding data window and then selecting the time-lag window to satisfy ...
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Wigner distribution associated with the symplectic coordinates transformation

Signal Processing, 2023
Yangfan He
exaly  

Time evolution law of Wigner operator in diffusion channel

Wuli Xuebao/Acta Physica Sinica, 2020
Gang Ren, Jian-Ming Du
exaly  

An introduction to applied quantum mechanics in the Wigner Monte Carlo formalism

Physics Reports, 2015
J M Sellier, M Nedjalkov, I Dimov
exaly