Laboratoire dElectronique

Toulouse, France

Laboratoire dElectronique

Toulouse, France
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Hrizi H.,Laboratoire dElectronique | Latrach L.,Laboratoire dElectronique | Sboui N.,Laboratoire dElectronique | Gharsallah A.,Laboratoire dElectronique | And 2 more authors.
2011 International Conference on Communications, Computing and Control Applications, CCCA 2011 | Year: 2011

The wave iterative method is a numerical method used in the electromagnetic modeling of high frequency electronic circuits. The objective of our study is to improve the convergence speed of the wave iterative method by adding a new algorithm based on filtering techniques. This method requires a maximum number of iterations, noted Nmax, to achieve the convergence to the optimal value. We aim at reducing the number of iterations calculated by the iterative method in order to reduce the computing time. The remaining iterations until Nmax are calculated by the new algorithm which ensures a rapid convergence to the optimal result. © 2011 IEEE.

Harouni Z.,Laboratoire delectronique | Osman L.,Laboratoire delectronique | Yeddes M.,Laboratoire delectronique | Gharsallah A.,Laboratoire delectronique | Baudrand H.,Enseeht Laboratoire Delectrique
World Academy of Science, Engineering and Technology | Year: 2010

In this paper, an efficient wave concept iterative process (WCIP) with auxiliary Sources is presented for full wave investigation of an active microwave structure on micro strip technology. Good agreement between the experimental and simulation results is observed.

Guesmia M.,Oran University of Science and Technology - Mohamed Boudiaf | Guezouri M.,Oran University of Science and Technology - Mohamed Boudiaf | Mbarek N.,Laboratoire DElectronique
International Journal of Communication Networks and Distributed Systems | Year: 2014

We propose a new media access control (MAC) layer enabling quality of service (QoS) multicast scheme for IEEE 802.11s networks, where a unicast routing protocol called hybrid wireless mesh protocol (HWMP) is defined. The HWMP protocol is more adapted for best effort traffic that is why its usage is not suitable for real time multimedia applications. The goal of our proposed mechanism is to take into account multicast communication under QoS constraints for the IEEE 802.11s mesh networks where no QoS multicasting has been defined. Our multicasting scheme handles QoS guarantee for real time applications. Indeed, our scheme is based on finding the QoS multicast tree thanks to an end-to-end delay evaluation to cover multicast services. A QoS multicast tree is constructed based on the proactive tree HWMP mechanisms. Simulations results, using Network Simulator 3 (NS 3), show that our scheme improves data multicast transmission overhead as well as network throughput. © 2014 Inderscience Enterprises Ltd.

Khalfaoui S.,IUT | Seulin R.,Laboratoire Delectronique | Fougerolle Y.,Laboratoire Delectronique | Fofi D.,Laboratoire Delectronique
Traitement du Signal | Year: 2014

This paper presents three methods for the digitization of 3D objects without prior knowledge on their shape. The first method is simple and naïve and is based on the generation of view points by sampling the bounding box of the acquired data at each step of the acquisition process. The second method is an analysis of the orientation of the scanned parts. The third method explores the barely visible surfaces and is a combination of the angular visibility and the real one by ray tracing. Tests with objects of different complexity classes were performed. The results of digitization are provided and prove the efficiency and the robustness of our approaches. © 2014 Lovoisier.

Ziar T.,University of Oum El Bouaghi | Zaabat M.,University of Oum El Bouaghi | Baudrand H.,Laboratoire dElectronique
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields | Year: 2013

The aim of this manuscript is to present the application of an iterative method based on the concept of transverse wave to analyze the packaging (passive element and substrate) miniaturization effect on the characteristics of an active planar circuit structure. This approach consists in the substitution of the active element by one auxiliary source, and connection is assumed by microstrip line as passive element deposited on one unique substrate. An implementation of the presented theory is shown by extraction of S-parameters and impedances of the active circuit using MATLAB program codes. Copyright © 2012 John Wiley & Sons, Ltd. Copyright © 2012 John Wiley & Sons, Ltd.

Makhlouf O.,Laboratoire dElectronique | Cueille M.,Laboratoire dElectronique | Dubard J.-L.,Laboratoire dElectronique
European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC | Year: 2015

The study of the interaction of the waves with the living requires taking into account the thermal aspect. To estimate the temperature in biological environments, the Pennes's equation must be solved. This paper presents a new numerical scheme based on the TLM method particularly suitable for the dosimetry in highly heterogeneous environments. The advantage of the method is its ability to perform simulation at a time step 14 times larger than those used with existing techniques, resulting in a strong reduction of the CPU time. The validity of the new algorithm proposed is demonstrated through comparisons with the FDTD method. © 2015 EuMA.

Ferchichi A.,Laboratoire dElectronique | Sboui N.,Laboratoire dElectronique | Gharsallah A.,Laboratoire dElectronique | Baudrand H.,Laboratoire dElectronique
Applied Computational Electromagnetics Society Journal | Year: 2010

This paper covers the design of a new antenna for RFID applications at microwave frequencies. Five antennas are studied. The first three structures are inspired from a triangular patch, whereas the fourth and the fifth are inspired from a Sierpenski fractal antenna. The size reduction is more than 80%, which explains the utility of the proposed antennas. © 2010 ACES.

Baudrand H.,Laboratoire dElectronique
Applied Computational Electromagnetics Society Journal | Year: 2012

A precise technique based on the wave concept iterative procedure (WCIP) and a fast mode transformation (FMT) is used to adjust the frequency selective surface (FSS) response. This adjustment is achieved by integrating RF-MEMS switches. These systems use the manufacturing processes of integrated circuits. In order to initialize the iterative procedure, an incident wave is defined in spectral domain. The numerical results are compared to those obtained with the finite element method (FEM). The good agreement between simulated and published data justifies the design procedure. © 2012 ACES.

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