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Virtues and vices of quartic time-frequency distributions
IEEE Transactions on Signal Processing, 2000We present results concerning three different types of quartic (fourth order) time-frequency distributions (TFDs). First, we present new results on the previously introduced local ambiguity function and show that it provides more reliable estimates of instantaneous chirp rate than the Wigner distribution.
Jeffrey C. O'Neill, Patrick Flandrin
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Visualization of EEG Using Time-Frequency Distributions
Methods of Information in Medicine, 1997Abstract:The EEG is a time-varying or nonstationary signal. Frequency and amplitude are two of its significant characteristics, and are valuable clues to different states of brain activity. Detection of these temporal features is important in understanding EEGs. Commonly, spectrograms and AR models are used for EEG analysis.
Stiber, Bilin Zhang, Sato, S.
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The Zak transform and decimated time-frequency distributions
IEEE Transactions on Signal Processing, 1996In this paper, the interrelation between the Zak transform and the generalized discrete time-frequency distribution (GDTFD) is examined. Starting with the discrete Zak transform, its definition is broadened to include arbitrary windows creating the windowed Zak transform (WZT). The WZT is then combined with the spectrogram.
John R. O'Hair, Bruce W. Suter
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A highly adaptive directional time–frequency distribution
Signal, Image and Video Processing, 2016This paper presents an automatic method of computing a high-resolution adaptive time–frequency distribution. A recently developed locally adaptive directional time–frequency distribution (ADTFD) achieves high energy concentration and cross-term suppression, but it requires manual tuning of certain parameters.
Mokhtar Mohammadi +2 more
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The running time-frequency distributions
Circuits Systems and Signal Processing, 1995zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Transition kernels for bilinear time-frequency distributions
IEEE Transactions on Signal Processing, 1991The author proposes a sequence of time-frequency signal representations which offer a continuous transition from time smoothed pseudo-Wigner-Ville distributions (PWVD) to a specified class of positive representations. This allows the selection of a representation which offers the desired tradeoff between the inherent localization properties of the PWVD
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1996
In this paper we consider the time frequency distributions of a class of operators on L-2(R), which we refer to as time-frequency periodic. By this we mean that they commute with a rectangular lattice subset of the Heisenberg-Weyl group, {D(nT, mF) : n, m is an element of Z}, for some fixed T, F is an element of R.
Sirianunpiboon, S, Howard, SD
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In this paper we consider the time frequency distributions of a class of operators on L-2(R), which we refer to as time-frequency periodic. By this we mean that they commute with a rectangular lattice subset of the Heisenberg-Weyl group, {D(nT, mF) : n, m is an element of Z}, for some fixed T, F is an element of R.
Sirianunpiboon, S, Howard, SD
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Bilinear time-frequency distributions
1994One of the main features of wavelet and Gabor theories is that they aim at decomposing signals into elementary ones localized to a certain extent in the time-frequency plane. One way of making this notion of localization more precise is to use time-frequency distributions.
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Kernel estimation for Time-frequency distribution
2015 23nd Signal Processing and Communications Applications Conference (SIU), 2015Zeynel Deprem, A. Enis Çetin
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