Results 11 to 20 of about 5,545,221 (295)
The face is central to primate multicomponent signals [PDF]
International Journal of Primatology, 2022 AbstractA wealth of experimental and observational evidence suggests that faces have become increasingly important in the communication system of primates over evolutionary time and that both the static and moveable aspects of faces convey considerable information. Therefore, whenever there is a visual component to any multicomponent signal the face is
Bridget M. Waller +4 more
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On Demodulation, Ridge Detection, and Synchrosqueezing for Multicomponent Signals [PDF]
IEEE Transactions on Signal Processing, 2017 In this paper, we present a novel technique for the retrieval of the modes of a multicomponent signal using a time-frequency (TF) representation of the signal. Our approach is based on a novel ridge extraction method that takes into account the fact that the TF representation is both discrete in time and frequency, followed by a demodulation procedure.
Sylvain Meignen +2 more
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A Novel Thresholding Technique for the Denoising of Multicomponent Signals [PDF]
2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2018 This paper addresses the issues of the denoising and retrieval of the components of multicomponent signals from their short-time Fourier transform (STFT). After having recalled the hard-thresholding technique, in the STFT context, we develop a new thresholding technique by exploiting some limitations of the former.
Duong-Hung Pham, Sylvain Meignen
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IEEE Transactions on Signal Processing, 2023 In this article, we define a new ridge detector that enables to localize strong interference in multicomponent signals in the time-frequency (TF) plane. Each mode of a multicomponent signal can usually be associated with a ridge in the TF plane, but this
S. Meignen, M. A. Colominas
semanticscholar +1 more source
A chirplet transform-based mode retrieval method for multicomponent signals with crossover instantaneous frequencies [PDF]
Digit. Signal Process., 2020 In nature and engineering world, the acquired signals are usually affected by multiple complicated factors and appear as multicomponent nonstationary modes. In such and many other situations, it is necessary to separate these signals into a finite number
Lin Li +3 more
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A Novel Ridge Detector for Nonstationary Multicomponent Signals: Development and Application to Robust Mode Retrieval [PDF]
IEEE Transactions on Signal Processing, 2020 Time-frequency analysis is often used to study non stationary multicomponent signals, which can be viewed as the surperposition of modes. To understand such signals, it is essential to identify the ridges associated with the modes in the time-frequency ...
Nils Laurent, S. Meignen
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IEEE Transactions on Signal Processing, 2022 In this paper, our goal is to investigate local chirp rate (CR) estimation in noisy multicomponent signals. The focus is put on improving a specific type of local CR estimator used in the second order synchrosqueezing transform, which proves to be very ...
Nils Laurent +2 more
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A New Adaptive Technique for Multicomponent Signals Reassignment Based on Synchrosqueezing Transform
European Signal Processing Conference, 2022 In this paper, we tackle the issue of making adaptive the reassignment of multicomponent signals using synchrosqueezing transforms. Indeed, depending on the frequency modulation of the modes making up these signals, the reassignment results with ...
Nils Laurent, S. Meignen
semanticscholar +1 more source
Local maximum synchrosqueezes form scaling-basis chirplet transform
PLoS ONE, 2022 In recent years, time-frequency analysis (TFA) methods have received widespread attention and undergone rapid development. However, traditional TFA methods cannot achieve the desired effect when dealing with nonstationary signals.
Yating Hou +3 more
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Alpha Transmitter Signals Observed by the Van Allen Probes: Ducted Versus Nonducted Propagation
Geophysical Research Letters, 2022 The interaction of very low frequency transmitter signals with radiation belt electrons depends ultimately on their wave normal angles. In the equatorial interaction region, these can be either low (ducted propagation) or comparatively large (nonducted ...
F. Němec +3 more
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