Browsing by Author "n 90698394 "
Now showing items 41-60 of 116
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Efficient phase estimation for the classification of digitally phase modulated signals using the cross-WVD: A performance evaluation and comparison with the S-transform
Mei C.Y.; Sha'ameri A.Z.; Boashash B. (2012 , Article)This article presents a novel algorithm based on the cross-Wigner-Ville Distribution (XWVD) for optimum phase estimation within the class of phase shift keying signals. The proposed method is a special case of the genera ... -
Estimating the number of components of a multicomponent nonstationary signal using the short-term time-frequency Rényi entropy
Sucic, Victor; Saulig, Nicoletta; Boashash, Boualem ( Springer , 2011 , Article)The time-frequency Rényi entropy provides a measure of complexity of a nonstationary multicomponent signal in the time-frequency plane. When the complexity of a signal corresponds to the number of its components, then this ... -
Evaluation of the modified S-transform for timefrequency synchrony analysis and source localisation
Assous S.; Boashash B. (2012 , Article)This article considers the problem of phase synchrony and coherence analysis using a modified version of the S-transform, referred to here as the Modified S-transform (MST). This is a novel and important time-frequency ... -
Fast and memory-efficient algorithms for computing quadratic time–frequency distributions
O'Toole, J.M.; Boashash, B ( Elsevier Inc , 2013 , Article)Algorithms for computing time–frequency distributions (TFDs) limit computation time by reducing numerical operations. But these fast algorithms do not reduce the memory load. This article presents four TFD algorithms to ... -
Foreword to WOSSPA2013 Proceedings
Boashash, Boualem ( IEEE , 2013 , Conference Proceedings) -
Generalised phase synchrony within multivariate signals: An emerging concept in time-frequency analysis
Omidvarnia A.; Boashash B.; Azemi G.; Colditz P.; Vanhatalo S. (2012 , Conference Paper)This paper introduces the notion of the instantaneous frequency (IF) based generalized phase synchrony in time-frequency analysis based on the concept of cointegration. This phase synchrony is then quantified by investigating ... -
Generalized Mean Phase Coherence for asynchrony abnormality detection in multichannel newborn EEG
Omidvarnia A.; Vanhatalo S.; Mesbah M.; Azemi G.; Colditz P.; Boashash B.... more authors ... less authors (2012 , Conference Paper)Inter-hemispheric asynchrony within the multichannel recordings of newborn EEG is associated with abnormal functionality of the newborn brain. Mean Phase Coherence (MPC) as a bivariate phase synchrony measure is widely ... -
Getting started with a practical and efficient time-frequency toolbox tfsap-7.0
Boashash B. ( Elsevier Inc. , 2015 , Book chapter)[No abstract available] -
Heuristic formulation of time-frequency distributions
Boashash B. ( Elsevier Inc. , 2015 , Book chapter)[No abstract available] -
High-resolution time-frequency distributions for fall detection
Amin M.G.; Zhang Y.D.; Boashash B. ( SPIE , 2015 , Conference Paper)In this paper, we examine the role of high-resolution time-frequency distributions (TFDs) of radar micro-Doppler signatures for fall detection. The work supports the recent and rising interest in using emerging radar ... -
Human gait recognition with cane assistive device using quadratic time-frequency distributions
Amin M.G.; Ahmad F.; Zhang Y.D.; Boashash B. ( Institution of Engineering and Technology , 2015 , Article)In this study, the authors consider the problem of human gait recognition in the presence of a walking cane using radars. Quadratic time-frequency distributions are used to provide the local signal behaviour over frequency ... -
Image fusion-based contrast enhancement
Saleem A.; Beghdadi A.; Boashash B. (2012 , Article)The goal of contrast enhancement is to improve visibility of image details without introducing unrealistic visual appearances and/or unwanted artefacts. While global contrast-enhancement techniques enhance the overal ... -
Image quality metrics based multifocus image fusion
Saleem, A; Beghdadi, A; Boashash, B ( IEEE , 2011 , Conference Paper)We describe an innovative methodology for block based multifocus image fusion in the spatial domain. The main idea is to use blind or no reference blur metrics for image fusion applications. Two blur quality metrics ... -
Improved characterization of HRV signals based on instantaneous frequency features estimated from quadratic time-frequency distributions with data-adapted kernels
Dong S.; Azemi G.; Boashash B. ( Elsevier Ltd , 2014 , Article)The analysis of heart rate variability (HRV) provides a non-invasive tool for assessing the autonomic regulation of cardiovascular system. Quadratic time-frequency distributions (TFDs) have been used to account for the ... -
Improved Discrete Definition of Quadratic Time-Frequency Distributions
O'Toole, J.M.; Mesbah, M.; Boashash, B. ( IEEE , 2010 , Article)Computation of a time-frequency distribution (TFD) requires a discrete version of the continuous distribution. This discrete TFD (DTFD) should be free from aliasing and conserve all the important mathematical properties ... -
An improved method for nonstationary signals components extraction based on the ICI rule
Lerga, J; Sucic, V; Boashash, B ( IEEE , 2011 , Conference Paper)This paper proposes an improved adaptive algorithm for components localization and extraction from a noisy multicomponent signal time-frequency distribution (TFD). The algorithm, based on the intersection of confidence ... -
Improving DOA Estimation Algorithms Using High-Resolution Quadratic Time-Frequency Distributions
Ouelha, Samir; Aissa-El-Bey, Abdeldjalil; Boashash, B. ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)This paper addresses the problem of direction of arrival (DOA) estimation and blind source separation (BSS) for nonstationary signals in the underdetermined case. These two problems are strongly related to the mixing matrix ... -
Improving performance of deblocking techniques using image fusion
Saleem A.; Beghdadi A.; Boashash B. (2012 , Conference Paper)Block based transform coding is the most popular technique for image and video compression. However, images compressed using block based algorithms exhibit blocking which is one of the most annoying artifacts in compressed ... -
Improving the classification of newborn EEG time-frequency representations using a combined time-frequency signal and image approach
Boashash B.; Boubchir L.; Azemi G. (2012 , Conference Paper)This paper presents new time-frequency (T-F) features to improve the classification of non-stationary signals such as EEG signals. Previous methods were based only on signal features that were derived from the instantaneous ... -
Instantaneous frequency based newborn EEG seizure characterisation
Mesbah M.; O'Toole J.M.; Colditz P.B.; Boashash B. (2012 , Article)The electroencephalogram (EEG), used to noninvasively monitor brain activity, remains the most reliable tool in the diagnosis of neonatal seizures. Due to their nonstationary and multi-component nature, newborn EEG seizures ...