Taoufik Aguili

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—This paper proposes a new modal analysis based on Floquet's theorem which is needful for the study of a 1-D periodic phased array antenna excited by arbitrary located sources. This analysis requires an accurate estimation for calculation of the mutual coupling parameters (for example: mutual impedances or admittances. . .) between the array elements and(More)
We present a multiresolution approach for blind image separation convolutely mixed. To move in transform domain, we make use of an Adaptive Quincunx Lifting Scheme based on wavelet decomposition followed by a geometric unmixing algorithm. In others words, the mixed signals are decomposed by an adaptive lifting scheme. Then, the unmixing algorithm is applied(More)
—Studying of mutual coupling parameters between the antenna elements in an array environment has been considered as the subject of feature research. That is why, in this paper, we present a new Floquet modal analysis procedure for analyzing almost periodic structures. Accurate evaluation of the mutual coupling could be achieved by this analysis. It is shown(More)
—In this paper we investigate traffic-engineering issues in Wavelength Division Multiplexing (WDM) all-optical networks. In such networks, the wavelength continuity constraint along with the wavelength clash constraint, lead to poor network performances when dealing with the lightpath provisioning problem. The impact of these constraints is especially(More)
This paper describes a new multi-resolution approach for the blind separation of convolutive image mixtures in transform domain. The proposed method uses an Adaptive Vectorial case of Quincunx Lifting Scheme (AVQLS), based on wavelet decomposition, and a geometric unmixing algorithm. It proceeds in three steps: first, the mixed images are decomposed by(More)
An original integral method (MR-GEC) based on the moment method (MoM) is developed in this paper to study dispersion characteristics of uniform microstrip lines. The introduction of a novel impedance operator by using the Generalized Equivalent Circuit (GEC) approach offers the simplicity of the resolution of the boundary problems by the transposition of(More)