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Author: James D. Taylor Publisher: CRC Press ISBN: 1315356570 Category : Technology & Engineering Languages : en Pages : 691
Book Description
This book presents the latest theory, developments, and applications related to high resolution materials-penetrating sensor systems. An international team of expert researchers explains the problems and solutions for developing new techniques and applications. Subject areas include ultrawideband (UWB) signals propagation and scattering, materials-penetrating radar techniques for small object detection and imaging, biolocation using holographic techniques, tomography, medical applications, nondestructive testing methods, electronic warfare principles, through-the-wall radar propagation effects, and target identification through measuring the target return signal spectrum changes.
Author: James D. Taylor Publisher: CRC Press ISBN: 1315356570 Category : Technology & Engineering Languages : en Pages : 691
Book Description
This book presents the latest theory, developments, and applications related to high resolution materials-penetrating sensor systems. An international team of expert researchers explains the problems and solutions for developing new techniques and applications. Subject areas include ultrawideband (UWB) signals propagation and scattering, materials-penetrating radar techniques for small object detection and imaging, biolocation using holographic techniques, tomography, medical applications, nondestructive testing methods, electronic warfare principles, through-the-wall radar propagation effects, and target identification through measuring the target return signal spectrum changes.
Author: Ali Mroué Publisher: ISBN: Category : Languages : fr Pages : 156
Book Description
L’étude présentée dans ce mémoire concerne le développement d’un système de détection et d’identification de cibles exploitant une technique multi-radar monostatique ultra large bande et dé- veloppé selon un axe. L’application visée porte sur le développement d’un système de détection et de discrimination d’objets chutant sur les voies ferroviaires. L’objectif principal de ce travail est d’étudier et d’évaluer les différents sous-ensembles radiofréquence et traitement du signal de ce dispositif et de les optimiser afin d’aboutir à la validation de la faisabilité du système complet. Un guide d’onde à fente, opérant dans la bande de fréquence optimale évaluée assure une couverture continue de rayonnement le long du quai. Il sert de support de propagation et est percé d’ouvertures constituant autant de radars monostatiques consécutifs. Après avoir caractérisé les différents objets susceptibles de chuter sur les voies ferroviaires par la méthode d’expansion de singularité (SEM), les coefficients naturels de réso- nance sont sauvegardés dans une bibliothèque afin de les utiliser dans le processus de discrimination. A l’issue de ce processus, que ce soit lors des simulations numériques ou lors d’essais expérimentaux, nous obtenons que les différentes familles d’objets détectés à proximité des radars monostatiques, dont les corps humains s’avèrent bien discriminés. En conclusion, ce travail a permis de mettre en œuvre un système original de détection et d’identification fondé sur l’utilisation de techniques avancées dans le domaine de la détection et de l’identification des objets. Il pourrait être étendu à d’autres domaines tels que la détection des liquides dans les valises des voyageurs voire la détection et l’identification d’intrusions dans des environnements complexes.
Author: Ali Mroué Publisher: Omniscriptum ISBN: 9786131561825 Category : Languages : fr Pages : 184
Book Description
L' tude pr sent e dans ce livre concerne le d veloppement d'un syst me de d tection et d'identification de cibles exploitant une technique multi-radar monostatique ultra large bande. L'application vis e porte sur le d veloppement d'un syst me de d tection et de discrimination d'objets chutant sur les voies ferroviaires. L'objectif principal de ce travail est d' tudier et d' valuer les diff rents sous-ensembles radiofr quence et traitement du signal de ce dispositif et de les optimiser afin d'aboutir la validation de la faisabilit du syst me complet. Un guide d'onde fente, op rant dans la bande de fr quence optimale valu e assure une couverture continue de rayonnement le long du quai. Il sert de support de propagation et est perc d'ouvertures constituant autant de radars monostatiques cons cutifs. Apr s avoir caract ris les diff rents objets susceptibles de chuter sur les voies ferroviaires par la m thode d'expansion de singularit (SEM), les coefficients naturels de r sonance sont sauvegard s dans une biblioth que afin de les utiliser dans le processus de discrimination.
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Sensor and Propagation Panel. Symposium Publisher: ISBN: Category : Radar Languages : en Pages : 200
Author: Jérôme Idier Publisher: John Wiley & Sons ISBN: 111862369X Category : Mathematics Languages : en Pages : 322
Book Description
Many scientific, medical or engineering problems raise the issue of recovering some physical quantities from indirect measurements; for instance, detecting or quantifying flaws or cracks within a material from acoustic or electromagnetic measurements at its surface is an essential problem of non-destructive evaluation. The concept of inverse problems precisely originates from the idea of inverting the laws of physics to recover a quantity of interest from measurable data. Unfortunately, most inverse problems are ill-posed, which means that precise and stable solutions are not easy to devise. Regularization is the key concept to solve inverse problems. The goal of this book is to deal with inverse problems and regularized solutions using the Bayesian statistical tools, with a particular view to signal and image estimation. The first three chapters bring the theoretical notions that make it possible to cast inverse problems within a mathematical framework. The next three chapters address the fundamental inverse problem of deconvolution in a comprehensive manner. Chapters 7 and 8 deal with advanced statistical questions linked to image estimation. In the last five chapters, the main tools introduced in the previous chapters are put into a practical context in important applicative areas, such as astronomy or medical imaging.
Author: Igor V. Komarov Publisher: Artech House ISBN: 1580531105 Category : Technology & Engineering Languages : en Pages : 308
Book Description
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.
Author: George Dassios Publisher: Oxford University Press ISBN: 9780198536789 Category : Language Arts & Disciplines Languages : en Pages : 322
Book Description
Scattering theory deals with the interactions of waves with obstacles in their path, and low frequency scattering occurs when the obstacles involved are very small. This book gives an overview of the subject for graduates and researchers, for the first time unifying the theories covering acoustic, electromagnetic and elastic waves.
Author: David M. Pozar Publisher: John Wiley & Sons ISBN: 0471322822 Category : Technology & Engineering Languages : en Pages : 380
Book Description
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.
Author: James D. Taylor
Author: James D. Taylor
Author: Ali Mroué
Author: Ali Mroué
Author: Ivan J. LaHaie
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Sensor and Propagation Panel. Symposium
Author: 
Author: Jérôme Idier
Author: Igor V. Komarov
Author: George Dassios
Author: David M. Pozar