ELHADI Kenane

HADJI Abdallah , & HABACI Imadeddine

Etude et conception d’une antenne MIMO avec des structures EBG pour les applications mobiles modernes

BENKHALED Asma

Evaluation and optimization of cellular mobile networks in M’sila city

Abir DAIRA , Fadwa BENMEBAREK

Analysis of Some CFAR Processors for High-Resolution Radar Systems

benadel sawsen , Benchebha yasmine

Planification et optimisation d’un réseau mobile dans la wilaya de Msila.

Djaidjaa Tariq

Etude et conception d’un diviseur de Gysel Reconfigurable pour les applications mobiles

Bachiri Rachid

Conception d’un filtre reconfigurable pour les applications de la 5eme génération

Boukherouba Saada , Mebarki Samia

Optimisation d'un modèle de propagation approprié pour la communication mobile

Bouafia Hanane , Ouali Karima

STUDY AND DESIGN OF A RECONFIGURABLE ANTENNA WITH EBG STRUCTURE

Boudraa Aymen , Bouhali Rabah

Etude et conception d’un diviseur de puissance reconfigurable pour les applications mobiles

Kawkech Madjd , Saadallah Ali

STUDY AND DESIGN OF A RECONFIGURABLE ANTENNA USING DEFECTIVE GROUND STRUCTURE FOR MOBILE COMMUNICATION

Roumir Imane

Synthèse d’un réseau d’antennes adaptatif pour une topologie circulaire

Mohamed chikouche Ikram , Guagui Imane

Etude et conception d’une lentille planaire de Rotman pour les réseaux mobiles

Abdelhadi, TITTAFI , Saïd, MOULAY

Etude et conception d’un diviseur de puissance bi-bande à quatre ports 

CHAIMA, Amel

Etude et conception d’une antenne reconfigurable pour les applications WLAN

Hemza, BACHIR , Hicham, BENRABEH

Conception d’une antenne multi-bandes pour les terminaux mobile LTE

Fatima Zahra, FEGRICHE , Houssem eddine, LEBOUKH

Etude Etude et simulation d’un contrôleur de puissance dans la troisième génération du réseau mobile.

Rachid, BACHIR

Etude des performances de la méthode BCO sur la réponse d’un réseau d’antennes adaptatif dans un environnement dynamique

Yacine, HADLI

LA CONCEPTION D’UNE ANTENNE PATCH POUR LES APPLICATIONS MOBILE LTE

oualid, bouslah

Estimation de la direction d’arrivé par une méthode à haute résolution pour un réseau d’antennes

Atika, TALEB HACINE

Etude et conception d’un réseau d’antennes à pointage en utilisant les réseaux de neurones apprenti par IWO

HELMI, SHAMSAN

L’optimisation d’un coupleur directionnel par l ’ADS Momentum

KHALED, LOGRAB

une nouvelle conception de la matrice de Butler en utilisant la taille optimisée du coupleur branch-line

DERRAR, FARES

La synthèse d’un réseau d’antennes linéaire par la méthode des mauvaises herbes

MARROK, Adel

LA CONCEPTION D’UNE ANTENNE PATCH POUR LES SYSTEMES DE TROISIEME GENERATION PAR L’ANSOFT HFSS

ROUIBEH, badreddine

Etude et simulation de la technique d’alimentation d’un réseau micro-ruban

Power dividers are widely used in antenna arrays feeding, radar systems, communication systems, and medical imaging systems, which makes it indispensable microwave components. These power dividers have several design advantages such as low cost, lightweight and manufacturability. Among these power dividers, one can cite Gysel power dividers which are used for antenna array feeding with high power-handling capability. This work presents a parametric study of a standard design of a Gysel divider intended for mobile applications. To design this power divider, the ADS Momentum simulator has been used. During this parametric study, our goal is to show the effect of some design parameters such as physical dimensions and electrical properties on some GPD characteristics in terms of bandwidth, power ratio, and isolation. The proposed structure consists of standard Gysel power divider of three ports and operating at the frequency of 2.4 GHz.

Citation

Amal SILA , ELhadi KENANE , Messaoud GARAH , ,(2023-10-21), Design and Parametric Study of a GYSEL Power Divider for Mobile Applications,NILES 2023,Nile university Egypt

In this correspondence, two exact closed-form expressions for the probability of false alarm have been derived assuming a homogeneous Gamma distributed clutter. These expressions concern both the cell averaging CFAR (CA-CFAR) and the greatest of CFAR (GO-CFAR) detectors. As it will be shown, the proposed expressions are given in terms of the Gauss hypergeometric function and the second Appell function. Our expressions are then examined and validated numerically, by comparing them to their counterparts computed using numerical integrals and Monte-Carlo simulations, considering various scenarios.

Citation

ELhadi KENANE , Mohamed SAHED , Ali KHALFA , Farid Djahli, , (2023), Exact Closed-Form Pfa Expressions for CA- and GO-CFAR Detectors in Gamma-Distributed Radar Clutter, IEEE Transactions on Aerospace and Electronic Systems, Vol:59, Issue:4, pages:4674 - 4679, IEEE

This letter presents an analytical study of the performance of the maximum-likelihood gamma constant false alarm rate (MLG-CFAR) detector operating over a homogenous gamma-distributed (GM) clutter. To accomplish this task, a novel closed-form expression for the probability of false alarm and a highly accurate approximation for the probability of detection are derived. Specifically, this proposed approximation is also given in a closed form. These expressions, which can be of great interest to the radar community, are given in terms of the Gauss hypergeometric function and the Tricomi function. Besides, the proposed expressions can be easily implemented and computed using most popular scientific software packages such as MATLAB, Maple, and Mathematica. Our propositions are then tested and validated using numerical computing and Monte Carlo simulations. The obtained results demonstrate a high accuracy and significant computational advantages of the proposed expressions compared to the alternative ones. Moreover, the detection performance of the MLG-CFAR detector is also conducted assuming a homogenous clutter with a known shape parameter.

Citation

Mohamed SAHED , ELhadi KENANE , Ali KHALFA , fdjahli@yahoo.fr, , (2023), Performance Analysis of the MLG-CFAR Detector in Homogenous Gamma-Distributed Sea Clutter, IEEE Geoscience and Remote Sensing Letters, Vol:20, Issue:2023, pages:1-5, IEEE

Among the most used power dividers in the field of telecommunications (antenna networks, mobile networks, radar system, satellite communications,military applications and even missile guidance) we can mention the Wilkinson power divider.In the present paper, a dual band Wilkinson power divider with four ways will be designed. In order to investigate the relationship between the physical dimensions of the Wilkinson power divide rwith its characteristics in terms of operational frequency and bandwidth, a parametric study of a Wilkinson power divider will be presented.To design the dual band four-way Wilkinson power divider (WPD), ADS Momentum simulator is used. The simulator uses a genetic algorithm (GA) algorithm to optimize the structure of the proposed WPD.The proposed power divider is developed to achieve dual bands requirements of WLAN applications. To obtain these frequency specifications in the proposed WPD, many transmission lines sections are added. The transmission lines are printed on FR4 (Flame Resistant 4) substrate of dielectric constant εr of3.4 with loss tangent of 0.0023. The proposed circuit exhibits good characteristics at WLAN frequencies (2.45GHz & 5.8 GHZ) in terms of return loss and isolation.

Citation

Messaoud GARAH , ELhadi KENANE , Fadila BENMEDDOUR , , (2022-02-01), Parametric Study and Optimization of a Dual-BandFour Port Wilkinson Power Divider, International Journal of Information Science & Technology, Vol:6, Issue:1, pages:2550-5114, https://innove.org/ijist/index.php/ijist/article/view/176

Signal and image separation are extensively used in numerous imaging applications and communication systems. In this paper, a novel Blind Source Separation (BSS) approach, based on the Hybrid Firefly Particle Swarm Optimization (HFPSO), is proposed for separating mixed images. This approach processes the observed source without any prior knowledge about the model and the statistics of the source signal. The proposed method presents high robustness against local minima and converges quickly to the global minimum. Via numerical simulations, the proposed approach is tested and validated in comparison with standard Particle Swarm Optimization (PSO), Robust Independent Component Analysis (RobustICA), and Artificial Bee Colony (ABC) algorithms. The obtained results show that the presented technique outperforms the existing ones in terms of quality of image separation, the Signal-to-Noise Ratio (PSNR), and Structural Similarity Index Measure (SSIM). Moreover, the obtained results demonstrate that our approach provides also promising results in image separation from noisy mixtures.

Citation

ELhadi KENANE , Ali KHALFA , Mohamed SAHED , Farid Djahli, , (2022), A Novel Blind Image Source Separation Using Hybrid Firefly Particle Swarm Optimization Algorithm, Engineering, Technology & Applied Science Research, Vol:12, Issue:6, pages:9680-9686, ETASR

Nowadays, the world knows a huge revolution in telecommunications, which has led to the need to integrate many services, such as long-term evolution (LTE), 5G, wireless local area network (WLAN), and Bluetooth, in one receiving and transmitting device. In the same way, all active and passive microwave circuits must be compatible with the integration of services, including the power divider, which is the subject of our work. This passive component is used in several fields such as medicine, surveillance, radar systems and others applications. Wilkinson divider is one of the most prominent power dividers, it is classified as narrow-band power divider and it is a very useful component in mobile applications (2.4 and 5.8 GHz). In this work, a reconfigurable 4-ports Wilkinson divider is designed using PIN diodes and simulated using connected speech test (CST) simulator software. This designed divider can easily modify the operation mode by activating or disabling the PIN diodes.

Citation

ELhadi KENANE , Messaoud GARAH , Farid Djahli, , (2022), A novel design of a reconfigurable power divider with stubs for mobile applications, Indonesian Journal of Electrical Engineering and Computer Science, Vol:26, Issue:2, pages:846-853, ijeecs

Blind source separation (BSS) concerns the signal processing techniques that aim to find several elementary components of sources from linear combinations of these sources received on several sensors. This paper presents a method for the extraction of these independent components. It is called Joint Approximate Diagonalization of Eigenmatrices (JADE) and uses fourth-order cumulants. A simulation example shows the performance of the proposed algorithm by displaying its high separation accuracy. The proposed technique is compared to the Equivariant Adaptive Source Separation Algorithm (EASI).

Citation

ELhadi KENANE , Ali KHALFA , Amardjia Noureddine, , (2022), Blind Image Separation Using the JADE Method, engproc, Vol:14, Issue:1, pages:1-7, MDPI Tongzhou Office, Beijing

This paper examines a downlink multi-hop user relays assisted non-orthogonal multiple access (NOMA). The system is used to combat channel disorders, extend the coverage area, and improve the quality of service (QoS). Both imperfect successive interference cancellation (SIC) and channel state information (CSI) are taken into consideration. Under imperfect SIC and CSI, we obtain the bit error rate (BER) and outage probability (OP) expressions for the helper user. Then, when imperfect CSI is available at all hops, we compute the end-toend BER and OP for far user message at each hop. Theoretical analyses are validated by computer simulations. The findings indicate that the BER and OP performance deteriorate as the hops increase. Additionally, at the high signal-to-noise ratio (SNR), the erroneous SIC and CSI create an error floor and impact the BER and OP performance at all hops

Citation

ELhadi KENANE , ,(2022), BER and Outage Performance for Multi-hop User-Relays NOMA with Imperfect SIC and CSI,ICATEEE22,University of Msila

The use of invasive weeds optimization in the synthesis of antenna arrays has become popular in the last few years. This optimization method is robust, simple and can be easily improved. Like other stochastic algorithms, IWO suffers from premature convergence and other drawbacks. To overcome these problems, a dynamic IWO is proposed and used for synthesizing two antenna array topologies (linear and circular array). This proposed method tries to achieve an optimal array pattern by acting on the amplitude excitation of elements in the non-uniform circular array and their positions on the array to obtain an array pattern with deep nulls in some directions of interferences and low side lobe level. For the linear array, the nulls control can be achieved by acting on the relative amplitude excitation of each element in the array for an optimal inter-element spacing. This proposed method improves the performance greatly and allows to achieve a maximum reduction in side lobe level in band Nulls with an acceptable dynamic range ratio (DRR). To show the performance of the proposed method, for each topology, our results are compared to other results of the literature.

Citation

ELhadi KENANE , Fadila BENMEDDOUR , Farid Djahli, , (2021-03-24), Nonuniform Circular Array Synthesis for Low Side Lobe Level Using Dynamic Invasive Weeds Optimization., Progress In Electromagnetics Research C, Vol:111, Issue:1, pages:147-162, PIER

The use of invasive weeds optimization in the synthesis of antenna arrays has become popular in the last few years. This optimization method is robust, simple and can be easily improved. Like other stochastic algorithms, IWO suffers from premature convergence and other drawbacks. To overcome these problems, a dynamic IWO is proposed and used for synthesizing two antenna array topologies (linear and circular array). This proposed method tries to achieve an optimal array pattern by acting on the amplitude excitation of elements in the non-uniform circular array and their positions on the array to obtain an array pattern with deep nulls in some directions of interferences and low side lobe level. For the linear array, the nulls control can be achieved by acting on the relative amplitude excitation of each element in the array for an optimal inter-element spacing. This proposed method improves the performance greatly and allows to achieve a maximum reduction in side lobe level in band Nulls with an acceptable dynamic range ratio (DRR). To show the performance of the proposed method, for each topology, our results are compared to other results of the literature.

Citation

Fadila BENMEDDOUR , ELhadi KENANE , Farid Djahli, , (2021-02-04), Parametric Study and Optimization of a Dual-BandFour Port Wilkinson Power Divider, Progress In Electromagnetics Research C, Vol:111, Issue:111, pages:147-162, Progress In Electromagnetics Research

In the present work, a dynamic stochastic method is proposed and used for the synthesis of uniform linear antenna arrays. The proposed method combines the classical invasive weeds (IWO) and the mutation process, which makes it robust, simple and shows flexibility to be adapted. The dynamic IWO applies the mutation process in the calculation of standard deviation during the spatial dispersal process of produced seeds while keeping the mean at the parent plants. In the mutation process, if special conditions were achieved, the standard deviation would be re-initialized. This proposed method tries to achieve an optimal array pattern by acting on the relative amplitude excitation of each element in the linear array for an optimal inter-element spacing. The optimal array pattern has deep or broad nulls in some directions of interferences with low sidelobes level. The objective of the synthesis is to get amplitude excitations with low dynamic range ratio (DRR), which facilitates the design of beamforming feed network. To illustrate the robustness of the proposed method, numerical examples are presented and compared with the obtained results using bees algorithm (BA), bacterial foraging algorithm (BFA), real genetic algorithm (RGA), and the corresponding reference array pattern for each example.

Citation

ELhadi KENANE , Haddi BAKHTI , Haddi BAKHTI , Farid Djahli, , (2021), A Dynamic Invasive Weeds Optimization Applied to Null Control of Linear Antenna Arrays with Constrained DRR, Advanced Electromagnetics, Vol:10, Issue:1, pages:52-60, Advanced Electromagnetics

Blind source separation (BSS) concerns the signal processing techniques that aim to find several elementary components of sources from linear combinations of these sources received on several sensors. This paper presents a method for the extraction of these independent components. It is called Joint Approximate Diagonalization of Eigenmatrices (JADE) and uses fourth-order cumulants. A simulation example shows the performance of the proposed algorithm by displaying its high separation accuracy. The proposed technique is compared to the Equivariant Adaptive Source Separation Algorithm (EASI)

Citation

ELhadi KENANE , Ali KHALFA , Amardjia Noureddine, ,(2021), Blind Image Separation Using Joint Approximate Diagonalization of Eigenmatrices (JADE) Method,ICCEIS2021,University of Boumerdes

In the present paper, a dual band four-way Wilkinson power divider (WPD) using a genetic algorithm (GA) optimization is designed and simulated using ADS Momentum simulator. The proposed power divider is developed to support dual bands of WLAN applications. The present power divider is formed by many transmission lines sections. The transmission lines are printed on FR4 (Flame Resistant 4) substrate of dielectric constant εr of3.4 with loss tangent of 0.0023. The proposed circuit exhibits good characteristics at WLAN frequencies (2.45GHz & 5.8 GHZ) in terms of return loss and isolation.

Citation

Messaoud GARAH , ELhadi KENANE , Fadila BENMEDDOUR , ,(2020-12-12), A Dual Band Four Ports WILKINSON Power Divider Design,IEEE 6th International Congress on Information Science and Technology (CiSt), Morocco,Morocco

In this paper, a tri-band inverted F antenna was proposed for wireless data telemetry and power transmission operation. This antenna will be implanted in human body. This surrounding medium witch having the properties of biological tissues will be considered. The proposed antenna covers three bands: MedRadio (401 – 405)MHz, and ISM (902.8 – 928)MHz, and ISM (2.4 – 2.5) GHz. The antenna is inserted in the biological tissue, The dimensions of the proposed antenna are 16 × 11 × 1:27mm3. The presented antenna is printed on Roger RO3210 substrate with dielectric constant "r = 10:2 and tan δ = 0:003

Citation

ELhadi KENANE , ASMA Djellid , ,(2020), Design of implanted tri-band PIFA antenna for MedRadio and ISM bands,IC3E2020,University of Buira

The spectral Domain approach is extensively used in microstrip analysis and domain. In such approach, the spectral dyadic Green's function which relates the tangential electric field and currents at various conductor planes should be determined. Many techniques have been proposed to derive the Green's function. The effect of both uniaxially anisotropy in the substrate on the resonant frequency and bandwidth of circular microstrip patch are investigated. The problem is regorously formulated using integral equation, the Kernel of which in the full wave spectral domain dyadic Green's function for multilayer dielectric substrates.

Citation

Fadila BENMEDDOUR , ELhadi KENANE , Dib Samira, Christophe Dumon, ,(2019-12-17), spectral domain analysis of circular printed antenna on uniaxially anisotrop substrate,ICAME2019,Istanbul, Turkey

In practice, it was found that the choice of the substrate or superstrate material of printed antennas is of a great importance and plays a significant role in achieving the optimum resonant characteristics of the antenna; Uniaxial dielectrics have drawn more attention due to their availability in materials such as sapphire, boron nitride and Epsilam-10 ceramic-impregnated Tefon. Previous studies of anisotropic materials used in microwave devices indicate that the effects of anisotropy on the performance of such structures particularly in high frequencies cannot be ignored. Three very popular full wave methods that can be used to characterise microstrip patch antennas are: the finite element method, the finite difference time domain method, and the moment method. The last one also known as the full-wave method is arguably the most popular method for the analysis of microstrip antennas. In this work, resonant characteristics (the resonant frequency, the Half-power bandwidth) of an annular microstrip patch printed on uniaxially anisotropic substrate and covered with an anisotropic superstrate layer are studied using an electric field integral equation and the spectral domain Green’s function. In order to validate the present method, we have confronted our results with theoretical and experimental data from the literature and very Good agreements were obtained between our computed data and measurements, and the convergence of the method is proven.

Citation

Fadila BENMEDDOUR , ELhadi KENANE , DUMOND Christophe, ,(2019-10-26), Effects of Superstrate Layer on the Resonant Characteristics of Annular-Ring printed Antenna,International Conference on Technology, Engineering and Science (IConTES 2019),Antalya, Turkey

In practice, it was found that the choice of the substrate or superstrate material of printed antennas is of a great importance and plays a significant role in achieving the optimum resonant characteristics of the antenna; Uniaxial dielectrics have drawn more attention due to their availability in materials such as sapphire, boron nitride and Epsilam-10 ceramic-impregnated Tefon. Previous studies of anisotropic materials used in microwave devices indicate that the effects of anisotropy on the performance of such structures particularly in high frequencies cannot be ignored. Three very popular full wave methods that can be used to characterise microstrip patch antennas are: the finite element method, the finite difference time domain method, and the moment method. The last one also known as the full-wave method is arguably the most popular method for the analysis of microstrip antennas. In this work, resonant characteristics (the resonant frequency, the Half-power bandwidth) of an annular microstrip patch printed on uniaxially anisotropic substrate and covered with an anisotropic superstrate layer are studied using an electric field integral equation and the spectral domain Green’s function. In order to validate the present method, we have confronted our results with theoretical and experimental data from the literature and very Good agreements were obtained between our computed data and measurements, and the convergence of the method is proven.

Citation

Fadila BENMEDDOUR , ELhadi KENANE , DUMOND Christophe, , (2019-10-26), Effects of Superstrate Layer on the Resonant Characteristics of Annular-Ring printed Antenna, The Eurasia Proceedings of Science, Technology, Engineering & Mathematics (EPSTEM), Vol:7, Issue:2019, pages:147 - 154, ISRES Publishing

Blind Source Separation (BSS) is a technique used to separate supposed independent sources of signals from a given set of observations. In this paper, the High Exploration Particle Swarm Optimization (HEPSO) algorithm, which is an enhancement of the Particle Swarm Optimization (PSO) algorithm, has been used to separate a set of source signals. Compared to PSO algorithm, HEPSO algorithm depends on two additional operators. The first operator is based on the multi-crossover mechanism of the genetic algorithm while the second one relies on the bee colony mechanism. Both operators have been employed to update the velocity and the position of the particles respectively. Thus, they are used to find the optimal separating matrix. The proposed method enhances the overall efficiency of the standard PSO in terms of good exploration and performance. Based on many tests realized on speech and music signals supplied by the BSS demo, experimental results confirm the robustness and the accuracy of the introduced BSS technique.

Citation

Ali KHALFA , ELhadi KENANE , Nourredine AMARDJIA, Djamel chikouche, Abdelouahab Attia, , (2019), Blind Audio Source Separation Based On High Exploration Particle Swarm Optimization, KSII Transactions on Internet and Information Systems, Vol:13, Issue:5, pages:2574-2587, TIIS

Water is a vital resource for life as well as for the majority of energy industries. Finding a way to manage this water sustainably is essential at a time when the world’s water resources are already under increasing stress due to population growth and global warming. As a direct implication, saving water is coming very crucial. This work deals with the application of the empirical mode decomposition method to the detection and the localization of the leaks using acoustic signals issued from STM32F4 acquisition card. Firstly, the empirical mode decomposition method has been applied in the denoising of acquired signals leading to two estimated components on which we apply secondly the correlation method to detect and localize the leakage in water distribution network. Experimental obtained results using a developed hydraulic plant as well as the acquisition system confirm the efficiency of the proposed method to detect accurately the leaks compared to conventional leaks detection methods.

Citation

Haddi BAKHTI , Miloud BENTOUMI , ELhadi KENANE , Abdelghani Harrrag, , (2019), Experimental Validation of Hybrid EMD-Correlation Acoustic Digital Leaks Detector in Water Distribution Network System, Instrumentation Mesure Métrologie, Vol:18, Issue:6, pages:535-545, IIETA

Effects of a superstrate layer on the resonant frequency and bandwidth of a high Tc superconducting (HTS) circular printed patch are investigated in this paper. For that, a rigorous full-wave spectral analysis of superconducting patch in multilayer configuration is described. In such an approach, the spectral dyadic Green's function which relates the tangential electric field and currents at various conductor planes should be determined. Integral equations are solved by a Galerkin's moment method procedure, and the complex resonance frequencies are studied with basis functions involving Chebyshev polynomials in conjunction with the complex resistive boundary condition. To include the superconductivity of the disc, its complex surface impedance is determined by using London's equation and the model of Gorter and Casimir. Numerical results are compared with experimental results of literature as well as with the most recent published calculations using different methods. A very good agreement is obtained. Finally, superstrate loading effects are presented and discussed showing interesting enhancement on the resonant characteristics of the superconducting antenna using combinations of Chebyshev polynomials as set of basis functions.

Citation

Fadila BENMEDDOUR , ELhadi KENANE , Christophe Dumon, , (2018-07-23), Resonant Characteristics of Circular HTC Superconducting Printed AntennaCoveredwith a Dielectric Layer, Progress In Electromagnetics Research M, Vol:71, Issue:9, pages:9-18, PIER

Dans cet ouvrage, nous proposons une méthode d'optimisation qui permet de faire la synthèse d'un réseau d'antennes linéaires en contrôlant les poids d'alimentations et/ou la distance inter-éléments d'un réseau d'antennes adaptatif, afin de maximiser le rapport signal à bruit plus interférences (SINR) et minimiser le niveau de lobes secondaires (NLS). Cette méthode est basée sur une méthode récente, dite méthode des mauvaises herbes (invasive weed optimization), inspirée du comportement intelligent de la colonisation des mauvaises herbes dans la nature. Elle a été développée pour la première fois en 2006, puis modifiée afin d'augmenter la vitesse de convergence et améliorer l'exploration de l'espace de recherche. Le choix de l'écart type affecte souvent les deux caractéristiques précédentes (la vitesse de convergence et l'exploration de l'espace de recherche). Pour évaluer la robustesse et les performances de cette méthode par rapport à d'autres méthodes équivalentes telles que l'algorithme génétique, l'essaim de particule et l'algorithme d'évolution différentielle (DE), plusieurs exemples de synthèse sont présentés.

Citation

ELhadiKENANE , Farid Djahli, ,(2018); Techniques d'optimisation des réseaux d'antennes intelligentes : utilisées en téléphonie mobile,,Noor Publishing

The main goal of the present paper is the study of transmitted power control (TPC) algorithms for mobile cellular systems (UMTS). A novel power control algorithm and some already existing ones have been studied focusing on resolving the near-far problem that affects the performance of the system a whole. Unlike the other existing power control algorithms, and besides the dynamic step size, our Modified Adaptive Power Control algorithm (MAPC) shows its uniqueness in the intelligence added to restrict the oscillations of the estimated signal to interference ratio (SIR) around its target value by using a stabilization zone. Simulations were carried out to evaluate the robustness of the novel algorithm. The results show that the proposed algorithm outperforms the other existing power control algorithms.

Citation

ELhadi KENANE , Haddi BAKHTI , Miloud BENTOUMI , Fegriche Fatima zahra, Farid Djahli, ,(2018), An Adaptive Power Control Algorithm For 3G Cellular Networks,International Conference on Communications and Electrical Engineering,El Oued, Algeria

This paper presents a new modified method for the synthesis of non-uniform linear antenna arrays. Based on the recently developed invasive weeds optimization technique (IWO), the modified invasive weeds optimization method (MIWO) uses the mutation process for the calculation of standard deviation (SD). Since the good choice of SD is particularly important in such algorithm, MIWO uses new values of this parameter to optimize the spacing between the array elements, which can improve the overall efficiency of the classical IWO method in terms of side lobe level (SLL) suppression and nulls control. Numerical examples are presented and compared to the existing array designs found in the literature, such as ant colony optimization (ACO), particle swarm optimization (PSO), and comprehensive learning PSO (CLPSO). Results show that MIWO method can be a good alternative in the design of non-uniform linear antenna array.

Citation

ELhadi KENANE , Farid Djahli, , (2016), Optimum design of non-uniform symmetrical linear antenna arrays using a novel modified invasive weeds optimization, Archives of electrical engineering, Vol:65, Issue:1, pages:5-18, De Gruyter

In this paper, a novel modified invasive weeds optimization (MIWO) is used for the synthesis of linear array antennas. The synthesis problem discussed in this paper is to find the amplitude excitation of the antenna array elements that are optimum to provide radiation pattern with symmetric wide nulls in both sides of the main beam. The Dynamic Range Ratio (DRR) is taken into account in this study. Unlike other simple algorithms, the Modified Invasive Weeds Optimization (MIWO) uses the mutation in the calculation of standard deviation, which changes the step of search in many directions and positions, from the parent plant, to produce new seeds. This proposed algorithm improves the performance greatly and allows to achieve a maximum reduction in side lobe level in band Nulls and with an acceptable DRR value. To show the performance of the proposed method, our results are compared to other results in the literature. They are also compared to a uniform excited linear.

Citation

ELhadi KENANE , Djahli Farid, Christophe Dumond, ,(2015), A Novel Modified Invasive Weeds Optimization for Linear Array Antennas Nulls Control,4th IEEE International Conference on Electrical Engineering (ICEE 2015),Boumerdes, Algeria

In this paper, a new modified method is presented for the synthesis of a linear antenna array to obtain a desired array pattern (shaped or pencil) with low side lobe level. Based on the original invasive weeds optimization (IWO), our modified IWO (MIWO) uses the process of mutation for the calculation of standard deviation. The shaped beam pattern is synthesized by respecting a desired cosecant pattern and supressing side lobe level to -25 dB. To achieve the desired pattern, both amplitude and phase of each element in the array are optimized when the spacing between the elements is fixed to the half wavelength. For the desired pencil beam pattern, the inter-element spacing’s are controlled while maintaining uniform excitations. Selected examples, for both shaped and pencil beam, are presented to show the effectiveness and flexibility of the proposed method

Citation

ELhadi KENANE , Farid Djahli, Bartil Arres, , (2015), Synthesis of Cosecant Linear Antenna Array Pattern using a Novel Modified Invasive Weeds Optimization, Elektronika IR Elektrotechnika, Vol:21, Issue:5, pages:86-89, Elektronika ir Elektrotechnika