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Robustesse Aux Interferences Dans Les Reseaux De Capteurs
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Book Synopsis Robustesse Aux Interférences Dans Les Réseaux de Capteurs by : Xin Yan
Download or read book Robustesse Aux Interférences Dans Les Réseaux de Capteurs written by Xin Yan and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern wireless system designs are increasingly involving dense deployment architectures for wireless networks. Such a feature makes interference in these networks an important limitation to the system performance. In several situations, such as wireless ad hoc or ultra wide band impulse radio, this interference exhibits an impulsive behavior. Such impulsive behavior is often badly captured by the classical Gaussian model. With such interference, the classical linear receiver, optimal for Gaussian noise, is no longer robust. Most of the conventional works were done under the premise of an assumption of independent and identically distributed interference random variables. However, space, time or frequency diversity can result in vectors with dependent components. In this thesis, we first give and general system model and give several distributions and models, and we compare them in modeling the impulsive interference. We then evaluate the robustness of different receiver strategies proposed when the noise model changes. We propose to classify the different ways to define receivers. We give also the parameter estimation method and we illustrate their performance under an impulsive interference environment. We also propose a first approach to model the time and/or space dependency of the interference samples. We use the framework of copulas that allows separating the marginal distributions and the dependence structure of the interference. We use the flexible family of the skew-t copulas and show that it significantly impacts the performance of a receiver.
Book Synopsis Réseaux de capteurs sans fil linéaires by : El Hadji Malick Ndoye
Download or read book Réseaux de capteurs sans fil linéaires written by El Hadji Malick Ndoye and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette thèse, il s'agit de proposer un protocole MAC qui prend en compte certaines spécificités des réseaux de capteurs sans fil linéaires. Ce protocole MAC est basé sur des jetons circulants qui donnent aux noeuds le droit d'accès au canal de transmission. Nous évaluons à partir de ce protocole l'impact des interférences et de la connectivité sur un réseau linéaire. Cette évaluation nous permet de proposer des techniques de clustering dans un réseau de capteurs sans fil linéaire. Nous supposons d'abord un clustering basé sur une exploitation logique du voisinage des noeuds capteurs. Nous considérons dans ce cas, un modèle de propagation déterministe qui ne tient pas en compte la complexité du milieu. Ensuite, nous considérons une technique de clustering dans laquelle le modèle de propagation prend en compte les fluctuations qui rendent le milieu complexe.
Book Synopsis Sur l'adaptation au contexte des réseaux de capteurs sans fil by : Charbel Nicolas
Download or read book Sur l'adaptation au contexte des réseaux de capteurs sans fil written by Charbel Nicolas and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobiles, pouvant changer d'environnements au cours du temps, et de milieu pour la transmission des données et de forme de topologie, les capteurs doivent s'adapter au contexte où ils se trouvent afin d'optimiser les mécanismes qu'ils mettent en œuvre. Dans la première partie, nous proposons un mécanisme pour adapter l'architecture d'un réseau de capteurs dynamiquement en fonction du contexte et comprenant la détection dynamique d'un changement de contexte, la détection dynamique du nouveau, l'adaptation dynamique au niveau des trois couches responsables de la gestion des liens de communication en conséquence, le tout sous contrainte de consommation d'énergie. Le travail mené dans cette première partie a d'emblée posé la question de la détection du contexte. C'est une question assez difficile car elle est mal définie. L'objet de la deuxième partie est d'aborder la reconnaissance à la volée de la technologie utilisée par les réseaux émettant du trafic concurrent au réseau de capteurs. Le mécanisme proposé, FIM, identifie la cause d'interférences à partir de modèles d'erreurs observées dans les paquets de données. La détection du contexte permet aux nœuds du réseau de capteurs d'obtenir des informations sur l'environnement. Certains nœuds doivent avoir une connaissance plus fiable de l'environnement que d'autres. Comment récupérer l'information de nœuds voisins, sélectionner ceux de qui on la récupère et ne garder que ce qui nous semble sûr et utile sont les questions qui sont abordées dans la troisième partie. Nous proposons un mécanisme qui permet de décider dynamiquement si des mécanismes de docition doivent être utilisés ou pas.
Book Synopsis Modélisation D'interférence Pour Simulateur 3D de Réseaux de Capteurs Dédiés Aux Villes Intelligentes by : Umber Noreen
Download or read book Modélisation D'interférence Pour Simulateur 3D de Réseaux de Capteurs Dédiés Aux Villes Intelligentes written by Umber Noreen and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of WSNs use unlicensed Industrial, Scientific and Medical (ISM) frequency band that makes interference probable phenomenon on a given channel.System throughput gets influenced by the interference as it can congest wireless medium, cause packet drops, re-transmissions, link instability, and inconsistent protocol behavior. In wireless sensor network research, simulation is one of the essential approaches to asses and evaluate system or protocol performance. The accuracy of estimated results depends on selected simulation parameters. In existing analysis on WSN, simple interference models are used in simulations. However, these interference models are not accurate enough for practical wireless sensor network applications analysis.Moreover, the rapid growth in the field of WSNs entails the need of creating new simulators that have more specific capabilities to tackle interference and multipath propagation effects.Finding a suitable simulation environment that allows researchers to verify new ideas and compare proposed future solutions is main task of this research.
Book Synopsis Mobile Fading Channels by : Matthias Pätzold
Download or read book Mobile Fading Channels written by Matthias Pätzold and published by Wiley-Blackwell. This book was released on 2002-04 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobile channel fading is a loss in transmission intensity caused by changes in the transmission medium. By dealing with the modelling, analysis and simulation of mobile fading channels this text provides a fundamental understanding of many issues in the area of mobile fading channel modelling.; The main topics addressed in the volume are: fundamentals of stochastic and deterministic channel models and modelling and simulation of frequency-nonselective and frequency-selective fading channels. The guide also features methods for the design and realization of efficient channel simulators and fast channel simulators and MATLAB-programs for the evaluation and simulation of mobile fading channels.
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Sensor and Propagation Panel. Symposium Publisher : ISBN 13 : Total Pages :488 pages Book Rating :4.E/5 ( download)
Book Synopsis Digital Communications Systems by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Sensor and Propagation Panel. Symposium
Download or read book Digital Communications Systems written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Sensor and Propagation Panel. Symposium and published by . This book was released on 1996 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Asynchronous Circuit Design by : Jens Sparsø
Download or read book Principles of Asynchronous Circuit Design written by Jens Sparsø and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Asynchronous Circuit Design - A Systems Perspective addresses the need for an introductory text on asynchronous circuit design. Part I is an 8-chapter tutorial which addresses the most important issues for the beginner, including how to think about asynchronous systems. Part II is a 4-chapter introduction to Balsa, a freely-available synthesis system for asynchronous circuits which will enable the reader to get hands-on experience of designing high-level asynchronous systems. Part III offers a number of examples of state-of-the-art asynchronous systems to illustrate what can be built using asynchronous techniques. The examples range from a complete commercial smart card chip to complex microprocessors. The objective in writing this book has been to enable industrial designers with a background in conventional (clocked) design to be able to understand asynchronous design sufficiently to assess what it has to offer and whether it might be advantageous in their next design task.
Book Synopsis The Disappearing Computer by : Norbert Streitz
Download or read book The Disappearing Computer written by Norbert Streitz and published by Springer. This book was released on 2007-07-20 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines how the computer, as we currently know it, will be replaced by a new generation of technologies, moving computing off the desktop and ultimately integrating it with real world objects and everyday environments. It provides a unique combination of concepts, methods and prototypes of ubiquitous and pervasive computing reflecting the current interest in smart environments and ambient intelligence.
Book Synopsis Fundamentals of Short-range FM Radar by : Igor V. Komarov
Download or read book Fundamentals of Short-range FM Radar written by Igor V. Komarov and published by Artech House. This book was released on 2003 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's a unique new resource that offers you a solid understanding of the fundamental theory, operation principles and applications of short-range frequency modulated continuous wave (FM CW) radar. You learn how to choose the structural scheme of short-range FM radar, and determine the optimal algorithm of useful signal processing necessary for ensuring the technical characteristic of radar. Moreover, this practical reference shows you how to ensure the minimum level of radar signal parasitic amplitude, calculate modulation signal distortion, and compensate for nonlinear distortion.
Book Synopsis Switched Reluctance Motor Drives by : R. Krishnan
Download or read book Switched Reluctance Motor Drives written by R. Krishnan and published by CRC Press. This book was released on 2017-12-19 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The switched reluctance machine (SRM) is the least expensive electrical machine to produce, yet one of the most reliable. As such, research has blossomed during the last decade, and the SRM and variable drive systems using SRMs are receiving considerable attention from industry. Because they require a power electronic converter and controller to function, however, successful realization of an SRM variable drive system demands an understanding of the converter and controller subsystems and their integration with the machine. Switched Reluctance Motor Drives provides that understanding. It presents a unified view of the machine and its drive system from all of its system and subsystem aspects. With a careful balance of theory and implementation, the author develops the analysis and design of SRMs from first principles, introduces a wide variety of power converters available for driving the SRM, and systematically presents both low- and high-performance controllers. The book includes an in-depth study of acoustic noise and its minimization along with application examples that include comparisons between ac and dc drives and SRM drive. The result is the first book that provides a state-of-the-art knowledge of SRMs, power converters, and their use with both sensor-based and sensorless controllers. Switched Reluctance Motor Drives enables both students and engineers to learn all aspects of SRM drive systems and appreciate the interdependence of the various subsystems in performance optimization.
Book Synopsis Wireless Sensor Networks by : Ian F. Akyildiz
Download or read book Wireless Sensor Networks written by Ian F. Akyildiz and published by John Wiley & Sons. This book was released on 2010-06-10 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an in-depth study on the recent advances in Wireless Sensor Networks (WSNs). The authors describe the existing WSN applications and discuss the research efforts being undertaken in this field. Theoretical analysis and factors influencing protocol design are also highlighted. The authors explore state-of-the-art protocols for WSN protocol stack in transport, routing, data link, and physical layers. Moreover, the synchronization and localization problems in WSNs are investigated along with existing solutions. Furthermore, cross-layer solutions are described. Finally, developing areas of WSNs including sensor-actor networks, multimedia sensor networks, and WSN applications in underwater and underground environments are explored. The book is written in an accessible, textbook style, and includes problems and solutions to assist learning. Key Features: The ultimate guide to recent advances and research into WSNs Discusses the most important problems and issues that arise when programming and designing WSN systems Shows why the unique features of WSNs – self-organization, cooperation, correlation -- will enable new applications that will provide the end user with intelligence and a better understanding of the environment Provides an overview of the existing evaluation approaches for WSNs including physical testbeds and software simulation environments Includes examples and learning exercises with a solutions manual; supplemented by an accompanying website containing PPT-slides. Wireless Sensor Networks is an essential textbook for advanced students on courses in wireless communications, networking and computer science. It will also be of interest to researchers, system and chip designers, network planners, technical mangers and other professionals in these fields.
Book Synopsis Microwave and RF Design of Wireless Systems by : David M. Pozar
Download or read book Microwave and RF Design of Wireless Systems written by David M. Pozar and published by John Wiley & Sons. This book was released on 2000-11-29 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: David Pozar, author of Microwave Engineering, Second Edition, has written a new text that introduces students to the field of wireless communications. This text offers a quantitative and, design-oriented presentation of the analog RF aspects of modern wireless telecommunications and data transmission systems from the antenna to the baseband level. Other topics include noise, intermodulation, dynamic range, system aspects of antennas and filter design. This unique text takes an integrated approach to topics usually offered in a variety of separate courses on topics such as antennas and proagation, microwave systems and circuits, and communication systems. This approach allows for a complete presentation of wireless telecommunications systems designs. The author's goal with this text is for the student to be able to analyze a complete radio system from the transmitter through the receiver front-end, and quantitatively evaluate factors. Suitable for a one-semester course, at the senior or first year graduate level. Note certain sections have been denoted as advanced topics, suitable for graduate level courses.
Book Synopsis Polar-orbiting environmental satellites by : United States. Government Accountability Office
Download or read book Polar-orbiting environmental satellites written by United States. Government Accountability Office and published by . This book was released on 2012 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium Publisher : ISBN 13 : Total Pages :202 pages Book Rating :4.E/5 ( download)
Book Synopsis Space Systems as Contributors to the NATO Defence Mission by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium
Download or read book Space Systems as Contributors to the NATO Defence Mission written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium and published by . This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Belief Functions: Theory and Applications by : Sébastien Destercke
Download or read book Belief Functions: Theory and Applications written by Sébastien Destercke and published by Springer. This book was released on 2018-09-07 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 5th International Conference on Belief Functions, BELIEF 2018, held in Compiègne, France, in September 2018.The 33 revised regular papers presented in this book were carefully selected and reviewed from 73 submissions. The papers were solicited on theoretical aspects (including for example statistical inference, mathematical foundations, continuous belief functions) as well as on applications in various areas including classification, statistics, data fusion, network analysis and intelligent vehicles.
Book Synopsis Water & Heritage by : Willem Willems
Download or read book Water & Heritage written by Willem Willems and published by . This book was released on 2017-01-15 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water is vital for life, and its availability has been a concern for mankind throughout the ages. Its presence has always been ascertained in a variety of ways and the development of human society everywhere is connected with various forms of water management. Man also needed to manage water to find protection from its dangers and the need for that is increasing. In the coming decades, the impact of climate change is expected to intensify floods and droughts, affect groundwater resources, raise sea levels, increase pollution and enhance the frequency and magnitude of disasters. Societies around the world are challenged to adapt to these threats to ensure water security, economic prosperity and environmental and cultural sustainability. This book deals with the heritage of water management and the use that was made of water, as well as the impact of water management on heritage. An example of the former may be an ancient irrigation system in the Filipines or in the Middle East that still functions today, while the latter may reflect the importance of maintaining groundwater levels for the preservation of organic remains on archaeological sites or of wooden piles underneath standing buildings. In either case the papers in this book reflect the dynamic nature of water, and hence the equally dynamic relation between water management and heritage. This publication follows up on a Heritage and Water conference in Amsterdam, the first of its kind. Its main purpose is to credibly present the importance and value of heritage and historical experience for water and sustainable development, and vice versa, present the importance of water management for the protection of heritage. It presents evolving insights and concepts about Water and about Heritage from a variety of disciplines, policy and public perspectives illustrated with cases studies and aims to connect decision makers with experts such as engineers, archaeologists, historians, geographers, ecologist and landscape architects
Book Synopsis MILCOM 2005 by : Institute of Electrical and Electronics Engineers
Download or read book MILCOM 2005 written by Institute of Electrical and Electronics Engineers and published by . This book was released on 2005 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
