Results 131 to 140 of about 1,520,902 (172)
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Efficient computation of the discrete pseudo-Wigner distribution
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1989A description is given of a novel algorithm, the fast Fourier transform in part (FFTP), for the computation of the discrete pseudo-Wigner distribution (DPWD). The FFTP computes the cosine and sine parts of the discrete Fourier transform (DFT) separately by employing real inverse sinusoidal twiddle factors. Unlike the conventional methods which directly
Mingui Sun +3 more
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About SIC POVMs and discrete Wigner distributions
Journal of Optics B: Quantum and Semiclassical Optics, 2005A set of d2 vectors in a Hilbert space of dimension d is called equiangular if each pair of vectors encloses the same angle. The projection operators onto these vectors define a POVM which is distinguished by its high degree of symmetry. Measures of this kind are called symmetric informationally complete, or SIC POVMs for short, and could be applied ...
Colin, Samuel +3 more
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Synthesis of discrete-time discrete-frequency Wigner distribution
IEEE Signal Processing Letters, 2003A recursive algorithm is proposed for synthesizing a discrete-time periodic signal from a specified discrete-time discrete-frequency Wigner distribution by minimizing the error in the cyclic outer product. Equating the gradient of the error with respect to signal samples to zero results in a set of nonlinear simultaneous equations, which are solved ...
Sudarshan Rao Nelatury +1 more
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Features of a discrete Wigner distribution
1996 IEEE Digital Signal Processing Workshop Proceedings, 2002We discuss important attributes of a discrete Wigner distribution derived using a group-theoretic approach. The nature of this approach enables this distribution to satisfy numerous mathematical properties, including marginals and the Weyl (1964) correspondence.
M.S. Richman, T.W. Parks, R.G. Shenoy
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Efficient computation of the discrete Wigner-Ville distribution
IEEE International Symposium on Circuits and Systems, 2002To ensure that the discrete Wigner-Ville distribution (DWVD) does not contain aliasing terms, the analytic signal is normally used instead of the real signal. However, the computation of the analytic signal amounts to most of the computation time.
null Shing-Chow Chan, null Ka-Leung Ho
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Discrete domain Wigner distributions-a comparison and an implementation
IEEE International Symposium on Circuits and Systems, 2003The ideas behind different definitions of the discrete domain Wigner distribution (DDWD) are compared. It is shown that all the definitions are smoothed (filtered) versions of an elemental definition. An implementation of the DDWD as an add-on utility used in a digital spectrum analyzer is presented. >
A. Pacut, W.J. Kolodziej, A. Said
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Fixed-point error analysis of discrete Wigner-Ville distribution
IEEE Transactions on Signal Processing, 1997The Wigner-Ville distribution (WVD) has been a powerful signal processing tool for time-frequency signal analysis. Consequently, many algorithms have been proposed in the literature for computing the WVD in real-time applications. However, Boashash (1987) has proposed and showed that the evaluation of the analytic signal using the time-domain approach,
K. M. M. Prabhu, R. Shanmuga Sundaram
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ABOUT THE MEAN KING'S PROBLEM AND DISCRETE WIGNER DISTRIBUTIONS
International Journal of Modern Physics B, 2006When the state of a quantum system belongs to a N-dimensional Hilbert space, with N the power of a prime number, it is possible to associate to the system a finite field (Galois field) with N elements. In this paper, we introduce generalized Bell states that can be intrinsically expressed in terms of the field operations.
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A contribution to the unaliased discrete-time Wigner distribution
The Journal of the Acoustical Society of America, 1993This paper presents a new closed form analytical definition of the unaliased discrete-time Wigner distribution (DTWD), which arises naturally from its continuous-time counterpart, and is straightforwardly implementable for digital signal processing. This DTWD possesses properties that resemble those of the continuous time case.
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Digital signal implementation of the discrete Wigner distribution function
Canadian Electrical Engineering Journal, 1985A computationally efficient representation of the discrete Wigner distribution function is suggested. It allows the investigation of the spectral properties of a real analytic signal to be performed and the possibility of its recovery from the distribution. A 2-D discrete representation is also introduced with special applications to image processing.
R. N. Gorgui-Naguib +2 more
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