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Author: Christophe Flouzat
Publisher:
ISBN:
Category :
Languages : fr
Pages : 196
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Book Description
Résumé anglais
Author: Christophe Flouzat
Publisher:
ISBN:
Category :
Languages : fr
Pages : 196
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Book Description
Résumé anglais
Author: Văn Tâm Nguyêñ
Publisher:
ISBN:
Category :
Languages : fr
Pages : 190
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Book Description
Le CAN basé sur la modulation sigma delta est capable de fournir une très haute résolution. Bien qu'il nécessite un suréchantillonnage, il est peu sensible aux imperfections des composants. Il est donc très populaire pour les applications de bande étroite demandant une haute résolution.Dans cette thèse, nous nous sommes intéressés à l'extension de ses applications vers une bande passante plus large. Nous avons d'abord étudié l'architecture sigma delta parallèle et proposé une nouvelle architecture basant sur la modulation sigma delta passe-haut et l'entrelacement temporel permettant de réduire significativement le problème caractéristique du parallélisme, à savoir la disparité entre les canaux.Nous avons ensuite étudié le modulateur sigma delta passe-haut et proposé une implémentation en technique des capacités commutées. Ce nouveau modulateur, contrairement au modulateur classique, est immune au bruit de basse fréquence et peut être utilisé non seulement dans une architecture parallèle, mais aussi de façon autonome.Nous avons aussi modélisé la plupart de non-idéalités du modulateur en VHDL-AMS pour arriver à une méthodologie de conception descendante qui permet de dériver les spécifications de tous les blocs du circuit à partir de performance visée pour le système complet. L'implémentation d'un modulateur sigma delta passe-haut d'ordre 2 et un CAN sigma delta passe-haut en combinant avec l'entrelacement temporel a été réalisée en CMOS 0,35 micromètre.Enfin, notre travail nous a permis de démontrer non seulement l'avantage du modulateur sigma delta passe-haut, mais aussi un perspective prometteur du CAN sigma delta parallèle pour les applications de très large bande.
Author: Jurgen Van Engelen
Publisher:
ISBN: 9781475745870
Category :
Languages : en
Pages : 208
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Book Description
Author: Xavier Begaud
Publisher: John Wiley & Sons
ISBN: 1118586573
Category : Technology & Engineering
Languages : en
Pages : 217
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Book Description
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.
Author: Alain Sibille
Publisher: Academic Press
ISBN: 0123821959
Category : Technology & Engineering
Languages : es
Pages : 385
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Book Description
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)
Author: Roberto Verdone
Publisher: Springer Science & Business Media
ISBN: 144712314X
Category : Computers
Languages : en
Pages : 696
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Book Description
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.
Author: Eric Brousseau
Publisher: Cambridge University Press
ISBN: 1107013429
Category : Business & Economics
Languages : en
Pages : 463
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Book Description
An interdisciplinary survey of the issues surrounding the governance of the Internet.
Author: Francine Krief
Publisher: John Wiley & Sons
ISBN: 1118580893
Category : Technology & Engineering
Languages : en
Pages : 235
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Book Description
This book focuses on green networking, which is an important topic for the scientific community composed of engineers, academics, researchers and industrialists working in the networking field. Reducing the environmental impact of the communications infrastructure has become essential with the ever increasing cost of energy and the need for reducing global CO2 emissions to protect our environment. Recent advances and future directions in green networking are presented in this book, including energy efficient networks (wired networks, wireless networks, mobile networks), adaptive networks (cognitive radio networks, green autonomic networking), green terminals, and industrial research into green networking (smart city, etc.).
Author: Louis Andriessen
Publisher: Amsterdam University Press
ISBN: 9053568565
Category : Music
Languages : en
Pages : 315
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Book Description
The one book about Stravinsky Stravinsky would have liked. Richard Taruskin.
Author: Michael Möser
Publisher: Springer Science & Business Media
ISBN: 3540927239
Category : Technology & Engineering
Languages : en
Pages : 540
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Book Description
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.
