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A Search Method for Unknown High-Frequency Oscillators in Noisy Signals Based on the Continuous Wavelet Transform

Published on Jul 1, 2019in Automation and Remote Control 0.59
· DOI :10.1134/S0005117919070051
I. V. Shcherban (SFedU: Southern Federal University), N. E. Kirilenko (SFedU: Southern Federal University), S. O. Krasnikov (SFedU: Southern Federal University)
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Abstract
We propose a method for finding a priori undefined structures of unknown temporal fluctuations for frequency oscillators of various intensities as part of the output signals of synchronized dynamical systems. Unlike traditional approaches, the developed method is based on the continuous wavelet transform of the observed signal and is efficient in cases when frequency characteristics of the desired pattern are close to the noise characteristics of the output signal.
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  • Citations (0)
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References7
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Published on Jan 1, 2010in Computers in Biology and Medicine 2.29
M. Emre Cek1
Estimated H-index: 1
(İzmir Institute of Technology),
Murat Özgören10
Estimated H-index: 10
(Dokuz Eylül University),
F. Acar Savaci4
Estimated H-index: 4
(İzmir Institute of Technology)
Abstract In this paper, the continuous time wavelet entropy (CTWE) of auditory evoked potentials (AEP) has been characterized by evaluating the relative wavelet energies (RWE) in specified EEG frequency bands. Thus, the rapid variations of CTWE due to the auditory stimulation could be detected in post-stimulus time interval. This approach removes the probability of missing the information hidden in short time intervals. The discrete time and continuous time wavelet based wavelet entropy variatio...
Published on May 1, 2006in Automation and Remote Control 0.59
A. M. Misrikhanov1
Estimated H-index: 1
Foreign works on the application of wavelet transforms to vital problems in electroenergetics, such as transient analysis, load prediction, electrical measurements, power quality analysis, relay protection, equipment diagnostics, and power E-commerce, are reviewed.
Published on May 1, 2002in Journal of Neuroscience Methods 2.79
Juliana Yordanova34
Estimated H-index: 34
(BAS: Bulgarian Academy of Sciences),
Vasil Kolev34
Estimated H-index: 34
(BAS: Bulgarian Academy of Sciences)
+ 4 AuthorsErol Başar49
Estimated H-index: 49
(Dokuz Eylül University)
Abstract Sensory/cognitive stimulation elicits multiple electroencephalogram (EEG)-oscillations that may be partly or fully overlapping over the time axis. To evaluate co-existent multi-frequency oscillations, EEG responses to unimodal (auditory or visual) and bimodal (combined auditory and visual) stimuli were analyzed by applying a new method called wavelet entropy (WE). The method is based on the wavelet transform (WT) and quantifies entropy of short segments of the event-related brain potent...
Published on Jan 1, 2001in Journal of Neuroscience Methods 2.79
Osvaldo A. Rosso39
Estimated H-index: 39
(Facultad de Ciencias Exactas y Naturales),
S. Blanco11
Estimated H-index: 11
(Facultad de Ciencias Exactas y Naturales)
+ 4 AuthorsErol Başar49
Estimated H-index: 49
(Scientific and Technological Research Council of Turkey)
Since traditional electrical brain signal analysis is mostly qualitative, the development of new quantitative methods is crucial for restricting the subjectivity in the study of brain signals. These methods are particularly fruitful when they are strongly correlated with intuitive physical concepts that allow a better understanding of brain dynamics. Here, new method based on orthogonal discrete wavelet transform (ODWT) is applied. It takes as a basic element the ODWT of the EEG signal, and defi...
Published on Jan 1, 2001in International Journal of Psychophysiology 2.41
E.rol Başar2
Estimated H-index: 2
,
M.artin Schürmann2
Estimated H-index: 2
+ 2 AuthorsA.hmet Ademoglu1
Estimated H-index: 1
(Boğaziçi University)
The EEG consists of the activity of an ensemble of generators producing rhythmic activity in several frequency ranges. These oscillators are active usually in a random way. However, by application of sensory stimulation these generators are coupled and act together in a coherent way. This synchronization and enhancement of EEG activity gives rise to 'evoked' or 'event-related oscillations'. The compound eoked potential manifests as superimposition of . evoked rhythms in the EEG frequencies rangi...
Published on Jan 1, 1998in Physical Review E 2.35
S. Blanco11
Estimated H-index: 11
(Facultad de Ciencias Exactas y Naturales),
Alejandra Figliola13
Estimated H-index: 13
(Facultad de Ciencias Exactas y Naturales)
+ 2 AuthorsEduardo Serrano7
Estimated H-index: 7
(Facultad de Ciencias Exactas y Naturales)
Signals obtained during tonic-clonic epileptic seizures are usually neglected for analysis by the physicians due to the presence of noise caused by muscle contractions. Although noise obscures completely the recording, some information about the underlying brain activity can be obtained with wavelet transform by filtering those frequencies associated with muscle activity. One great advantage of this method over traditional filtering is that the filtered frequencies do not modify the pattern of t...
Published on Mar 1, 1995in Physical Review E 2.35
S. Blanco11
Estimated H-index: 11
,
Rodrigo Quian Quiroga34
Estimated H-index: 34
+ 1 AuthorsSilvia Kochen17
Estimated H-index: 17
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