Results 231 to 240 of about 1,433,403 (294)

Time-frequency distributions-a review

Proceedings of the IEEE, 1989
A review and tutorial of the fundamental ideas and methods of joint time-frequency distributions is presented. The objective of the field is to describe how the spectral content of a signal changes in time and to develop the physical and mathematical ideas needed to understand what a time-varying spectrum is.
Leon Cohen
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Decimated time-frequency distributions

Proceedings of IEEE-SP International Symposium on Time- Frequency and Time-Scale Analysis, 2002
The decimated generalized discrete time-frequency distribution (D-GDTFD) was introduced by O'Hair and Suter (see IEEE International Conference on Circuits and Systems, London, U.K., 30 May-2 June 1994). It trades bandwidth for speed of implementation and requires greatly reduced storage over the generalized discrete time-frequency distribution (GDTFD).
J.R. O'Hair, B.W. Suter
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Robust time-frequency distributions

Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467), 2002
The time-frequency (TF) distributions robust with respect to the heavy-tailed impulse noise are introduced. The robust spectrogram (SPEC) and robust Wigner distribution (WD) are considered. The calculation procedure and properties of these representations are given.
V. Katkovnik, I. Djurovic, L.J. Stankovic   +2 more
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Time-frequency distribution series

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002
Using the orthogonal-like Gabor (1946) expansion, we decompose the Wigner-Ville (1932, 1948) distribution as a linear combination of localized and oscillated 2D Gaussian functions. Based on the degree of oscillation, we further group those 2D Gaussian functions into time-frequency functions P/sub d/(t,/spl omega/) and thereby obtain the so-called time ...
S. Qian, D. Chen
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Signal synthesis and positive time–frequency distributions

Journal of the Franklin Institute, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Shah, Syed Ismail, El-Jaroudi, Amro, Loughlin, Patrick J., Chaparro, Luis F.   +3 more
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Time-Frequency Distribution of Evoked Otoacoustic Emissions

British Journal of Audiology, 1997
Otoacoustic emissions (OAE) are non-stationary signals that vary in time depending on the characteristics of the stimulus. Traditional spectral analysis using Fourier methods ignores the effects of time and can miss important temporal information. Therefore, a better form of spectral analysis requires the use of time-frequency distribution methods ...
Ozdamar, O, Zhang, JW, Kalayci, T, Ulgen, Y   +3 more
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Generalized-marginal time-frequency distributions

Proceedings of Third International Symposium on Time-Frequency and Time-Scale Analysis (TFTS-96), 1996
We introduce a family of time-frequency (TF) distributions with generalized-marginals, i.e., beyond the time-domain and the frequency-domain marginals, in the sense that the projections of a TF distribution along one or more angles are equal to the magnitude squared of the fractional Fourier transforms of the signal.
Xiang-gen Xia, Y. Owechko, B.H. Soffer, R.M. Matic   +3 more
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