Results 61 to 70 of about 769 (173)
, 2018 In this paper, we propose a new method to estimate instantaneous frequency using a combined approach based on the discrete linear chirp transform (DLCT) and the Wigner distribution (WD). The DLCT locally represents a signal as a superposition of linear chirps while the WD provides maximum energy concentration along the instantaneous frequency in the ...
Alkishriwo, Osama A., Chaparro, Luis F.
openaire +2 more sources
Theory and applications of generalized marginals of time-frequency distributions.
, 1994 The generalized marginals of a time-frequency distribution are the Radon transform of the distribution. The generalized marginals can be used as a domain for time-frequency analysis along with the ambiguity domain, time-correlation domain, the frequency ...
Krishnamachari, Srivathsan
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A method for extracting object related information from in-line holograms using Wigner distribution
, 1990 Cataloged from PDF version of article.Includes bibliographical refences.In this thesis, a method based on Wigner distribution is developed to find the three-dimensional coordinates of particles directly from their in-line hologram without ...
Özgen, Mehmet Tankut
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Spectra of phase point operators in odd prime dimensions and the extended Clifford group
, 2008 We analyze the role of the extended Clifford group in classifying the spectra of phase point operators within the framework laid out by [ Gibbons et al., Phys. Rev.
Appleby, D. M. +5 more
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Aliasing In The Af-Gdtfd And The Discrete Spectrogram
, 1996 It has recently been claimed that many of the discrete timefrequency representations (TFRs), including the alias free generalize time-frequency distributions (AF-GDTFD), contain aliasing components. This paper shows that the class of AF-GDTFD does indeed
Jeffrey C. O'neill +1 more
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The Discrete Linear Chirp Transform and its Applications [PDF]
, 2013 In many applications in signal processing, the discrete Fourier transform (DFT) plays a significant role in analyzing characteristics of stationary signals in the frequency domain. The DFT can be implemented in a very efficient way using the fast Fourier
Alkishriwo, Osama
core
Image feature analysis using the Multiresolution Fourier Transform [PDF]
The problem of identifying boundary contours or line structures is widely recognised as an important component in many applications of image analysis and computer vision.
Davies, Andrew Richard
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QUASIDISTRIBUTIONS and COHERENT STATES FOR FINITE-DIMENSIONAL QUANTUM SYSTEMS
, 2011 In recent years, an approach to discrete quantum phase spaces which comprehends all the main quasiprobability distributions known has been developed. It is the research that started with the pioneering work of Galetti and Piza, where the idea of operator
M. A. Marchiolli +3 more
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Phase reconstruction from two Wigner distribution projections
, 2001 The reconstruction of a signal - and in particular its phase - from the distributions associated with the instantaneous power of the signal or, more general, its fractional power spectra, is an important problem in signal processing.
Stankovic, L. +5 more
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Experimental demonstration of negative-valued polarization quasiprobability distribution
, 2017 Polarization quasiprobability distribution defined in the Stokes space shares many important properties with the Wigner function for position and momentum.
Chekhova, M. +5 more
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