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Beam-steering antennas are the ideal solution for a variety of system applications, it is most commonly achieved through using phased arrays, where phase shifters are used to control the relative of the main-beam. In this paper, a low-cost directive beam-steering phased array (DBS-PA) antenna using switched line phase shifters is demonstrated. The proposed DBS-PA antenna has four micro-strip patch...
The telemedicine is a medical practice which consists in using new technologies of information and communication (NTIC). It makes it possible to facilitate the transfer and diagnosis of several medical data at distance. The security of medical images plays an important role to ensure and guarantee the integrity and confidentiality. This paper presents a robust multiple watermarking which combine discrete...
The international conference on wireless networks and mobile communications (WINCOM'16) is held in the imperial city and Scientific capital of Morocco, Fez, on 26–29 October 2016, Hotel Medina Palace.
In this paper we present a performance comparison of an inset fed circular microstrip patch antenna designed to operate at milimeterwave frequencies, with and without a DGS (defected ground plane structure). The parameters such as gain, directivity, return loss and bandwidth are notably improved in our proposed prototype. Also a comparison is made with other previously published works [1]. The proposed...
In this paper, the design of a microstrip patch antenna using superstrate layers for performance enhancement is presented. The proposed antenna is excited by using the edge, inset, probe and aperture feeding methods. Genetic Algorithm optimization technique has been utilized for the optimization of patch antenna dimensions. The double layer dielectric superstrate disposed above the patch antennas...
Electromagnetic Band-Gap (EBG) structures are popular and efficient techniques for microwave applications; they are periodic metallic or dielectric materials. EBG may be combined with microstrip patch antenna to increase the directivity, the radiation efficiency and/or to suppress surface waves, to reduce the side lobes of the radiation pattern and to increase the bandwidth. In this paper, we study...
Positioning techniques based on cellular networks are gaining more attention thanks to their accuracy and availability in multiple environment compared to GPS signal which face a big difficulty to reach them. Those techniques can be enhanced with adaptive filtering process, In this paper we will try to introduce the chosen positioning method to work with then apply two different type of filters to...
Mobile positioning by cellular networks has received growing attention and several researches are carried out to enhance positioning algorithms and techniques that will be able to give better performance at multiple environments (outdoors/indoors). In this paper, we are interested in UTDOA (uplink time difference of arrival) approach to determine the location of a Mobile Station within an acceptable...
Signaling is one of the keys to voice over IP success; it provides all basic elements to establish successful IP calls with a high-quality service depending on network capacities. To display these competences, OPNET Modeler is an available simulator which evaluates every network environment and tells which scenario is the most suitable. In this developed tool, it is possible to implement voice over...
This paper presents an integrated framework of Geographic Information System (GIS) and a Relational Database Management System (RDBMS) equipped with interactive communication capabilities. The model integrates the design of the database and the management of implementation of the monitoring system which includes the operations of query and analysis using the web and desktop applications. This study...
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