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The study presents an investigation of the effects of a single, or multiple circular shaped slot (cut) can be used to improve the performance of a simple patch antenna operating in Wireless Local Area Network (WLAN) frequencies (2.4 Ghz). The design is achieved by cutting single or multiple circular slots at the radiating element of the patch antenna. The effects of different circular slots orientations...
The extensible Markup Language (XML) has known since its beginnings an undeniable success. Defined since its origins as a meta-language facilitating the development of specialized tags Languages, nowadays, many documents benefit from the XML frame. But even if this language is strongly used in the web as a way of data exchange between applications, it still lack the capacity of defining the web resources...
The deployment of Wireless Sensor Networks to support optimal coverage is obviously a fastidious task, especially in hard to reach or inaccessible area. To address this problem, simplifying assumptions and simulations are commonly used techniques. However, these techniques may not be able to capture all the details about the problem to be solved. Hence, transition from the simulation to the actual...
This work presents a study on the performance of a hybrid 5G RF/FSO communication system. Both transmitter and receiver communicate through two paths: the first link operates under Radio-Frequency (RF) technology, assumed to undergo a Weibull fading channel, while the second link operates under Free Space Optical (FSO) technology, subject to Málaga-M turbulence model with the presence of pointing...
The sector of telecommunications is undergoing a rapid change due to the diversity of technologies, competition between different operators, and the increasing request of services of video on demand (VoD). In this regard, the Next Generation Network (NGN) proves to be the tendency of several operators. Thus, each operator is forced to make his network more efficient to ensure the loyalty of his customers...
Virtual laboratories are fully interactive simulations in which students conduct experiments, collect data and answer questions to assess their understanding. The primary objective of virtual cloud-based lab solutions is to provide customized IT environments for users. In today's information, networks and security training, time and location are one of the crucial elements for participants. Many universities...
The increasing data demand of mobile users in the rural environment makes the provision of the Internet access quite challenging. Specialized relay stations can help to enhance the network coverage, but in geographically difficult terrains with users being widely scattered, their usage becomes economically and operationally difficult. In this paper, we propose to utilize the ordinary mobile users...
This work presents the design and simulation of a dual band rectangular patch antenna operating at 2.4 GHZ, and 3.5 GHZ for Zigbee and Wimax applications. The proposed antenna is expected to meet the requirements of wireless connections in the architecture of a pre-hospital emergency system inspired from the literature, which uses the Internet of Things (IOT) technology. The simulations were carried...
In the near future some of mobile communication prime objectives need to be improved, including increased capacity, higher data rate, low latency, and better quality of service. To respond to these growing demands, a modification should be done at the physical layer in terms of waveforms adopted. Flexible waveforms have been proposed to meet the challenges faced in current generation systems such...
Several wireless and mobile access technologies such as LTE, 3G, 802.11, WiMaX, etc, are omnipresent in the mobile terminal environment and offer different flows (e.g. data, voice and video). This heterogeneous environment requires the integration of different technologies in order to exploit their complementary characteristics and provide the mobile terminal with the best connectivity anywhere and...
Formal verification has become very useful and popular in last decade in area of embedded systems design and in analysis of critical systems. It can reveal common errors like deadlocks, starvation, check system invariants, but also verify more complex properties defined by LTL formulas whose writing may be very error prone for non expert users. To reduce the time-to-market for embedded systems and...
Many researches and standardization work on the challenges that 5th networks generation raised from the radio perspective while employing advanced techniques such as massive MIMO (Multiple-Input-Multiple-Output) and CoMP (Cooperative Multi-points Processes). However the backhaul problems such as bottlenecks has emerged due to the deployment of ultradense and heavy traffic that should be connected...
With the recent proliferation of the Internet-of-Things (IoT) devices, coupled with the expected massive growth in the deployment of such devices, the 3GPP Specifications continued to evolve to address the performance needs and the cost/complexity reduction requirements of these IoT devices, achieved through the introduction of new features and new User Equipment (UE) categories. These features will...
In this article, we investigate energy efficient power control for the uplink of an OFDMA single-cell communication system. The user equipments decide freely their power level on the available subcarriers of the system in order to maximize their EE (Energy Efficiency) while respecting minimum normalized rate requirements. We use the non-cooperative Game theory to demonstrate that users will end by...
In this paper, we propose three different approaches in order to multiplex N bits of data using very high efficiency differential chaos shift keying (VHE-DCSK) system. This system allows higher spectral efficiency than differential chaos shift keying (DCSK) and high efficiency differential chaos shift keying (HE-DCSK) systems. Using Gaussian approximation method and under a white Gaussian noise channel...
A non-orthogonal multicarrier signal, termed spectrally efficient frequency division multiplexing (SEFDM), is investigated in this work. It improves spectral efficiency by compressing sub-carrier spacing below the symbol rate at the cost of self-created inter carrier interference (ICI). Sphere decoding (SD) is an efficient method to recover signals approaching maximum likelihood (ML) performance....
Founded in 2005 YouTube has became the most fast growing stream service, that has a great impact on the internet traffic distribution. Thus understanding YouTube's characteristics is crucial to network providers. In this survey we are going to present the factors that impact user's satisfaction, in other meaning the impact on the Quality of experience(QoE). Furthermore we will discuss how to determine...
In order to keep up with countless emerging applications requirements, cellular systems have to embed new flexible aspects, with the aim of satisfying future wireless environments expectations. In this context, we consider a cellular system based a full-duplex amplify-and-forward cooperative communication over Nakagami-m channel. We assume the direct link between the source and the destination is...
Recently an extensive deployment of small cell Networks (SCNs) called two tier-heterogeneous networks have been proposed, especially for dense urban zone. Therefore, Macro Cell Networks containing a hyper density of SCNs distributed randomly within it will emerge the field. The benefits of two tier Heterogeneous Networks (HetNets) are realized through the traffic flooding via small cells. To enhance...
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