Browsing by Author "Ouelha, Samir"
Now showing items 1-6 of 6
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A robust high-resolution time-frequency representation based on the local optimization of the short-time fractional Fourier transform
Awal, Md Abdul; Ouelha, Samir; Dong, Shiying; Boashash, B. ( Elsevier Inc. , 2017 , Article)The Locally Optimized Spectrogram (LOS) defines a novel method for obtaining a high-resolution time-frequency (t,f) representation based on the short-time fractional Fourier transform (STFrFT). The key novelty of the LOS ... -
An efficient inverse short-time Fourier transform algorithm for improved signal reconstruction by time-frequency synthesis: Optimality and computational issues
Ouelha, Samir; Touatib, Sami; Boashasha, Boualem ( Elsevier Inc. , 2017 , Article)This paper presents an improved signal reconstruction method based on a new inverse short-time Fourier transform (ISTFT) estimator. The main challenge addressed in this study is to design a more computationally efficient ... -
An Improved Design of High-Resolution Quadratic Time-Frequency Distributions for the Analysis of Nonstationary Multicomponent Signals Using Directional Compact Kernels
Boashash, B.; Ouelha, Samir ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)This paper presents a new advanced methodology for designing high resolution time-frequency distributions (TFDs) of multicomponent nonstationary signals that can be approximated using piece-wise linear frequency modulated ... -
Design of a Time-Frequency Algorithm for Automatic Eeg Artifact Removal
Boashash, Boualem; Ouelha, Samir; Maqsood, Sadiq Ali ( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)The injuries suffered by newborns during birth are a major health issue. To improve the health outcomes of sick newborns using EEG measurements, a number of recent studies focused on the use of high-resolution Time-Frequency ... -
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 ... -
Performance evaluation of time-frequency image feature sets for improved classification and analysis of non-stationary signals: Application to newborn EEG seizure detection
Boashash, B.; Barki, Hichem; Ouelha, Samir ( Elsevier B.V. , 2017 , Article)This study demonstrates that a time-frequency (TF) image pattern recognition approach offers significant advantages over standard signal classification methods that use t-domain only or f-domain only features. Two approaches ...