Download or read book CONTRIBUTION A LA CONCEPTION DE CIRCUITS DE COMMANDE LASER POUR LES TRANSMISSIONS ANALOGIQUE ET NUMERIQUE A TRES HAUT DEBIT APPLICATIONS A LA REALISATION D UN CIRCUIT LARGE BANDE EN TECHNOLOGIE MICRORUBAN written by DENIS.. LE BERRE and published by . This book was released on 1997 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES SYSTEMES DE TRANSMISSION PAR FIBRE OPTIQUE APPORTENT AUJOURD'HUI UNE SOLUTION INTERESSANTE POUR LE TRANSPORT D'INFORMATION A DES DEBITS DE PLUS EN PLUS ELEVES. DANS CET OBJECTIF, CE TRAVAIL A POUR OBJET D'APPORTER UNE CONTRIBUTION A LA CONCEPTION DE CIRCUIT DE COMMANDE LASER ET IL S'INSCRIT DANS LE CADRE DU DEVELOPPEMENT AU LEST DU POLE OPTOELECTRONIQUE. L'OBJECTIF PRINCIPAL DE CE TRAVAIL CORRESPOND A LA CONCEPTION DE RESEAUX D'ADAPTATION PLACES ENTRE LA DIODE LASER ET LE CIRCUIT DE COMMANDE HYPERFREQUENCE. EN VUE D'AMELIORER LES PERFORMANCES DE LA MODULATION INTERNE DU LASER, CES RESEAUX D'ADAPTATION SONT INDISPENSABLES COMPTE TENU D'UNE PART DE LA REPONSE INTRINSEQUE DU LASER ET D'AUTRE PART DE LA GRANDE DIFFERENCE D'IMPEDANCE ENTRE LES ELEMENTS. SUR LA BASE DE LA METHODE DES FREQUENCES REELLES, NOUS AVONS DEVELOPPE ET ADAPTE LA METHODE A UNE STRUCTURE DIFFERENTIELLE POUR UNE APPLICATION DE TRANSMISSION ANALOGIQUE. NOUS AVONS DONC MIS AU POINT DEUX LOGICIELS D'ANALYSE, D'OPTIMISATION ET DE SYNTHESE PERMETTANT D'ABOUTIR A LA CONCEPTION DU CIRCUIT DE COMMANDE. CES LOGICIELS CORRESPONDENT RESPECTIVEMENT AUX MODES IMPAIR ET PAIR DE LA STRUCTURE DIFFERENTIELLE. POUR LE PREMIER, L'OBJECTIF EST D'ATTEINDRE UNE PUISSANCE OPTIQUE DE SORTIE CONSTANTE EN FREQUENCE, PAR CONTRE POUR LE SECOND, L'OBJECTIF EST DE LE REJECTER AU MAXIMUM PAR LA CONCEPTION D'UNE CHARGE ACTIVE AFIN D'ABOUTIR A UN FONCTIONNEMENT GLOBAL DE LA STRUCTURE EQUIVALENT A CELUI DU MODE IMPAIR. NOUS AVONS ALORS DEVELOPPE UN EXEMPLE DE CONCEPTION POUR UNE APPLICATION DE DEPORT D'ANTENNE DANS LA BANDE 10.7-14.5 GHZ, PUIS NOUS AVONS REALISE UN CIRCUIT CORRESPONDANT AU SEUL MODE IMPAIR DE LA STRUCTURE DANS UNE BANDE DE FREQUENCE ALLANT DE 0.1 A 4 GHZ. MALGRE QUELQUES LEGERES VARIATIONS, NOTAMMENT AU-DELA DE LA BANDE PASSANTE, LES MESURES SONT SUFFISAMMENT PROCHE DE LA THEORIE POUR VALIDER LA METHODE DE CONCEPTION. POUR LA SECONDE APPLICATION CONCERNANT LA CONCEPTION DE CIRCUIT DE COMMANDE LASER POUR DES APPLICATIONS DE TRANSMISSION NUMERIQUE A TRES HAUT DEBIT, NOUS AVONS DEVELOPPE UNE METHODE D'ANALYSE PUREMENT TEMPORELLE, CECI COMPTE TENU DES CARACTERISTIQUES FORTEMENT NON LINEAIRES DE LA DIODE LASER EN REGIME GRAND SIGNAL, DU CARACTERE ALEATOIRE DES SEQUENCES DU SIGNAL ELECTRIQUE APPLIQUEES A L'ENTREE DU CIRCUIT. L'EFFICACITE DU FORMALISME DEVELOPPE LIEE A LA SIMPLICITE DES PARAMETRES S TEMPORELS DES LIGNES ELEMENTAIRES DU QUADRIPOLE D'ADAPTATION, NOUS A PERMIS DE DISPOSER D'UN OUTIL D'ANALYSE TEMPORELLE DE CIRCUIT NON LINEAIRE PRECIS ET RAPIDE ET DEBOUCHANT SUR LA CONSTRUCTION DU DIAGRAMME DE L'IL. NOUS AVONS ALORS DEMONTRE SUR PLUSIEURS EXEMPLES ET POUR DIFFERENTS DEBITS, L'IMPORTANCE DU RESEAU D'ADAPTATION DANS UN CIRCUIT DE COMMANDE LASER.
Download or read book Contribution a la conception de circuits de commande laser pour les transmissions analogique et numerique a tres haut debit Application a la realisation d un circuit large written by Denis Le Berre and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CONCEPTION ET MISES EN UVRE DE CIRCUITS INTEGRES GAAS POUR LA COMMANDE EN LONGUEUR D ONDE DE DIODES LASERS RAPIDEMENT ACCORDABLES written by JEAN.. HOURANY and published by . This book was released on 1996 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE ETUDE SE SITUE DANS LE CONTEXTE DES RECHERCHES, ACTUELLEMENT INTENSIVES, SUR LES NOUVEAUX RESEAUX MULTIPOINTS DE TELECOMMUNICATIONS NUMERIQUES MULTICOLORES SUR FIBRE OPTIQUE. ELLE VISE A CONCEVOIR DES CIRCUITS INTEGRES GAAS POUR LA COMMANDE EN LONGUEUR D'ONDE DE DIODES LASERS ACCORDABLES RAPIDEMENT (EN QUELQUES NANOSECONDES). L'ASSEMBLAGE DE LA DIODE LASER ET DE SON CIRCUIT DE COMMANDE AU SEIN D'UN ENSEMBLE COMPACT EST ETUDIE POUR DEUX TYPES DE MODULES: MODULE DE CONVERSION EN LONGUEUR D'ONDE UTILISANT UN LASER DBR A 3 SECTIONS ET MODULE DE FILTRAGE EN LONGUEUR D'ONDE UTILISANT UN FILTRE DFB ORIGINAL. DANS CES MODULES, L'ACCORD RAPIDE EST EFFECTUE A L'AIDE, RESPECTIVEMENT, DE 1 ET 2 COURANTS ELECTRIQUES. DANS LE CHAPITRE II, DES BRIQUES ELECTRONIQUES DE BASE SONT PROPOSEES ET REALISEES EN UTILISANT DES TECHNOLOGIES A BASE DE TRANSISTORS PSEUDOMORPHIQUES A HAUTE MOBILITE ELECTRONIQUE (P-HEMT). LES PERFORMANCES OBTENUES SONT PRESENTEES ET COMPAREES. LES VARIATIONS BASSE-FREQUENCE DE LA CONDUCTANCE DE SORTIE ET LES DISPERSIONS TECHNOLOGIQUES SONT PRISES EN COMPTE DANS LA CONCEPTION DES CES ETAGES. LE CHAPITRE III TRAITE DES ARCHITECTURES DES CIRCUITS COMPLETS. COMME PRECEDEMMENT, PLUSIEURS ARCHITECTURES ORIGINALES SONT PRESENTEES, ET TESTEES, EN UTILISANT QUATRE TECHNOLOGIES DIFFERENTES (DONT UNE TECHNOLOGIE P-HEMT DOUBLE-SEUIL). UN EFFORT PARTICULIER EST PORTE A LA REDUCTION DE LA CONSOMMATION. LE PROBLEME DE L'INTEGRATION DE CES CIRCUITS AVEC LES DIODES LASERS EST ABORDE AU CHAPITRE IV: UN CIRCUIT DE DECOUPLAGE TRES LARGE BANDE ET L'ASSEMBLAGE COMPLET DES MODULES ONT ETE OPTIMISES. DES CARACTERISATIONS EXPERIMENTALES DE PLUSIEURS TYPES DE MODULES DE CONVERSION ET DE FILTRAGE ACCORDABLE EN LONGUEUR D'ONDE SONT PRESENTEES. L'ETUDE EST FINALEMENT VALIDEE PAR L'INTEGRATION DE MODULES AU SEIN DES DEUX MATRICES EXPERIMENTALES DE COMMUTATION ATM ASSEMBLEES PAR DEUX LABORATOIRES EUROPEENS EXTERIEURS. CETTE ETUDE OUVRE LA VOIE A DES SYSTEMES FONCTIONNELS ET COMPACTS DE TRAITEMENT DES DONNEES AU SEIN DES NOUVEAUX RESEAUX DE TELECOMMUNICATIONS A HAUT DEBIT BASES SUR LE MULTIPLEXAGE ET LE ROUTAGE DE CELLULES DE DONNEES NUMERIQUES
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Download or read book MIMO written by Alain Sibille and published by Academic Press. This book was released on 2010-12-03 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) - The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components - Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems - Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Download or read book Pervasive Mobile and Ambient Wireless Communications written by Roberto Verdone and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.
Download or read book Principles of Radar and Sonar Signal Processing written by Chevalier François Le and published by Artech House. This book was released on 2002 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Acoustics written by Michael Möser and published by Springer Science & Business Media. This book was released on 2009-09-01 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Suitable for both individual and group learning, Engineering Acoustics focuses on basic concepts and methods to make our environments quieter, both in buildings and in the open air. The author’s tutorial style derives from the conviction that understanding is enhanced when the necessity behind the particular teaching approach is made clear. He also combines mathematical derivations and formulas with extensive explanations and examples to deepen comprehension. Fundamental chapters on the physics and perception of sound precede those on noise reduction (elastic isolation) methods. The last chapter deals with microphones and loudspeakers. Moeser includes major discoveries by Lothar Cremer, including the optimum impedance for mufflers and the coincidence effect behind structural acoustic transmission. The appendix gives a short introduction on the use of complex amplitudes in acoustics.
Download or read book Space Time Coding for Broadband Wireless Communications written by Georgios B. Giannakis and published by John Wiley & Sons. This book was released on 2007-02-26 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eine vielversprechende Technologie zur Maximierung der Bandbreiteneffizienz in der breitbandigen drahtlosen Kommunikation ist die Raum-Zeit-Kodierung. Theorie und Praxis verbindend, ist dieses Buch die erste umfassende Diskussion von Grundlagen und designorientierten Aspekten von Raum-Zeit-Codes. Single-Carrier und Multi-Carrier-Übertragungen für Einzel- und Mehrnutzerkommunikation werden behandelt.
Download or read book Electric Machines and Drives written by Miroslav Chomat and published by BoD – Books on Demand. This book was released on 2011-02-28 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this book is an important and diverse field of electric machines and drives. The twelve chapters of the book written by renowned authors, both academics and practitioners, cover a large part of the field of electric machines and drives. Various types of electric machines, including three-phase and single-phase induction machines or doubly fed machines, are addressed. Most of the chapters focus on modern control methods of induction-machine drives, such as vector and direct torque control. Among others, the book addresses sensorless control techniques, modulation strategies, parameter identification, artificial intelligence, operation under harsh or failure conditions, and modelling of electric or magnetic quantities in electric machines. Several chapters give an insight into the problem of minimizing losses in electric machines and increasing the overall energy efficiency of electric drives.
Download or read book Photovoltaic Engineering Handbook written by F Lasnier and published by CRC Press. This book was released on 1990-01-01 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Photovoltaic Engineering Handbook is the first book to look closely at the practical problems involved in evaluating and setting up a photovoltaic (PV) power system. The author's comprehensive knowledge of the subject provides a wealth of theoretical and practical insight into the different procedures and decisions that designers need to make. Unique in its coverage, the book presents technical information in a concise and simple way to enable engineers from a wide range of backgrounds to initiate, assess, analyze, and design a PV system. It is beneficial for energy planners making decisions on the most appropriate system for specific needs, PV applications engineers, and anyone confronting the practical difficulties of setting up a PV power system.
Download or read book Modern Radar Detection Theory written by Antonio De Maio and published by IET. This book was released on 2015-11-25 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern radar detection is the new frontier for advanced radar systems capable of operating in challenging scenarios with a plurality of interference sources, both manmade and natural. Written by top researchers and recognized leaders in the field, this is the first book to provide a comprehensive understanding of the current research trends in modern radar detection. It updates readers with the latest radar signal processing algorithms now capable with high-speed computer chips and sophisticated programs. It also includes examples and applications from real systems. This is essential reading for radar systems design engineers within aerospace companies, military radar engineers, and aerospace contractors/consultants.
Download or read book Advanced Ultrawideband Radar written by James D. Taylor and published by CRC Press. This book was released on 2016-12-19 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Advances in Automatic Control written by Mihail Voicu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the academic year 2002-2003, the Faculty of Automatic Control and Computer Engineering of Ia~i (Romania), and its Departments of Automatic Control and Industrial Informatics and of Computer Engineering respectively, celebrated 25 years from the establishment of the specialization named Automatic Control and Computer Engineering within the framework of the former Faculty of Electrical Engineering of Ia~i, and, at the same time, 40 years since the first courses on Automatic Control and Computers respectively, were introduced in the curricula of the former specializations of Electromechanical Engineering and Electrical Power Engineering at the already mentioned Faculty of Electrical Engineering. The reader interested to know some important moments ofour evolution during the last five decades is invited to see the Addendum ofthis volume, where a short history is presented. And, to highlight once more the nice coincidences, it must be noted here that in 2003 our Technical University "Gheorghe Asachi" of Ia~i celebrated 190 years from the emergence of the first cadastral engineering degree course in Ia~i (thanks to the endeavor ofGheorghe Asachi), which is today considered to be the beginningofthe engineering higher education in Romania. Generally speaking, an anniversary is a celebration meant to mark special events ofthe past, with festivities to be performed solemnly and publicly according to a specific ritual.
Download or read book 2015 IEEE International Conference on Smart Energy Grid Engineering SEGE written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IT Measurement written by International Function Point Users Group and published by Addison-Wesley Professional. This book was released on 2002 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: With Contributions by Capers Jones, Howard Rubin, David Garmus, Lawrence Putnam, and Elizabeth Clark The accurate, quantitative measurement of software quality and process performance is rapidly becoming an essential part of competition in the ever-tightening software marketplace. Software metrics provide insights into productivity and quality gains from improvements in skill, technology, and development methodology. An effective metrics program helps practitioners assemble the best team, select the optimal development methodology, and enhance the quality of a software product. In short, metrics enable software developers to pursue proven, successful strategies, and to change course when metrics point to less-than-optimum quality or productivity. Written by the world's leading authorities in the field, IT Measurement showcases state-of-the-art in software metrics and provides the practical knowledge that practitioners need in order to take full advantage of software metrics technology. The book's collected articles offer important perspectives on the role of metrics in the development process, and show how metrics directly enhance software quality and output efficiency. The book explores several vital areas, including Function Point Analysis, project estimation and management, outsourcing, statistical process control, and more. These articles range from basic theory to the sophisticated application of metrics. Specific topics covered include: The expanding role of function point metrics Work output measurement for IT work units The use of metrics for tracking Enhanced estimation with metrics Metrics in outsourcing Standardization of SLOC The application of SPC to performance management Functional metrics in B2B e-commerce project success Enlightening and pragmatic, IT Measurement will help you gain a deeper understanding of software metrics and the ability to apply concrete measures in order to objectively evaluate and more finely shape your software development program. 020174158XB02212002
