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Etude Et Amelioration Des Techniques Cdma Optiques
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Book Synopsis Étude et amélioration des techniques CDMA optiques by : Hichem Mrabet
Download or read book Étude et amélioration des techniques CDMA optiques written by Hichem Mrabet and published by Editions Universitaires Europeennes. This book was released on 2012-03 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de ce travail est d'etudier et d'ameliorer les techniques CDMA optique en termes de codage et de reception, en utilisant des codes optiques a deux dimensions(2-D) dans le contexte d'un reseau LAN optique. D'abord une etude theorique de performance d'un systeme CDMA optique dote de code optique a deux dimensions a ete menee en termes de taux d'erreur binaire et de capacite de multiplexage, au moyen de deux approches, en l'occurrence, l'approche gaussienne et l'approche combinatoire. Ensuite, afin de reduire les interferences d'acces multiples(IAM) et d'atteindre la capacite de multiplexage theorique du systeme CDMA optique etudie en fonction des proprietes du code utilise, nous avons employe un recepteur CDMA optique a annulation d'interference serie(recepteur SIC), tout en minimisant le nombre d'etages d'annulation et en optimisant leurs parametres."
Book Synopsis Contribution par la simulation système à l'étude des contraintes des composants optoélectroniques sur la transmission optique utilisant la technique CDMA by : Younes Zouine
Download or read book Contribution par la simulation système à l'étude des contraintes des composants optoélectroniques sur la transmission optique utilisant la technique CDMA written by Younes Zouine and published by . This book was released on 2005 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: La technique CDMA (Code Division Multiple Access ou Accès Multiple par Répartition de Codes) est largement utilisée dans le domaine radiofréquence (3G) et suscite un intérêt croissant pour tirer parti de la largeur de bande offerte par la fibre optique. Associée au DWDM (Dense Wavelength Digital Multplexing), cette technique permettrait en effet un accroissement important du nombre d’utilisateurs au niveau local sans accroître les besoins en nombre de fibres du réseau de transport. Elle s’accompagnerait donc d’une diminution évidente du coût du bit/km. Ce type d’étude est gouverné par des contraintes liées au traitement du signal et aux performances des composants. Les recherches rapportées dans ce mémoire consistent en une étude exploratoire par la simulation système des contraintes imposées par les composants et fonctions optoélectroniques qui pourraient répondre aux besoins d’architectures de réseaux locaux optiques basés sur l’application du CDMA. Les limitations dues aux composants des fonctions émission et réception ont été particulièrement étudiées (laser + modulateur, photodiodes, électronique large bande associée,....). De plus, les propriétés de la fibre optique (dispersion, atténuation,....) sont prises en compte dans le cas spécifique des réseaux locaux.
Book Synopsis Etude et optimisation des techniques MC-CDMA pour les futures générations de sytèmes de communications hertziennes by : Stéphane Nobilet
Download or read book Etude et optimisation des techniques MC-CDMA pour les futures générations de sytèmes de communications hertziennes written by Stéphane Nobilet and published by . This book was released on 2003 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :The Ceramic Society of Japan Publisher :Springer Science & Business Media ISBN 13 :4431539131 Total Pages :507 pages Book Rating :4.4/5 (315 download)
Book Synopsis Advanced Ceramic Technologies & Products by : The Ceramic Society of Japan
Download or read book Advanced Ceramic Technologies & Products written by The Ceramic Society of Japan and published by Springer Science & Business Media. This book was released on 2012-07-31 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Ceramic Technologies & Products describes the development, materials, and manufacturing processes for various ceramic products. The text focuses on the products themselves, and tries to clarify how ceramics have contributed to our lives.
Book Synopsis Optical Code Division Multiple Access by : Paul R. Prucnal
Download or read book Optical Code Division Multiple Access written by Paul R. Prucnal and published by CRC Press. This book was released on 2018-10-03 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Code-division multiple access (CDMA) technology has been widely adopted in cell phones. Its astonishing success has led many to evaluate the promise of this technology for optical networks. This field has come to be known as Optical CDMA (OCDMA). Surveying the field from its infancy to the current state, Optical Code Division Multiple Access: Fundamentals and Applications offers the first comprehensive treatment of OCDMA from technology to systems. The book opens with a historical perspective, demonstrating the growth and development of the technologies that would eventually evolve into today's optical networks. Building on this background, the discussion moves to coherent and incoherent optical CDMA coding techniques and performance analysis of these codes in fiber optic transmission systems. Individual chapters provide detailed examinations of fiber Bragg grating (FBG) technology including theory, design, and applications; coherent OCDMA systems; and incoherent OCDMA systems. Turning to implementation, the book includes hybrid multiplexing techniques along with system examples and conversion techniques to connect networks that use different multiplexing platforms, state-of-the-art integration technologies, OCDMA network security issues, and OCDMA network architectures and applications, including a look at possible future directions. Featuring contributions from a team of international experts led by a pioneer in optical technology, Optical Code Division Multiple Access: Fundamentals and Applications places the concepts, techniques, and technologies in clear focus for anyone working to build next-generation optical networks.
Download or read book 3G Evolution written by Erik Dahlman and published by Academic Press. This book was released on 2007 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical book, written by engineers working closely in 3GPP, gives insight into the new technologies adopted by 3GPP, with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE. The key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced radio resource management and protocols, and different radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of HSPA and LTE implementation are given. An overview of other related systems such as TD SCDMA, CDMA2000, and WIMAX is also provided.This is a ‘must-have’ resource for engineers and other professionals working with cellular or wireless broadband technologies who need to know how to utilize the new technology to stay ahead of the competition. Gives the first explanation of the radio access technologies and key international standards for moving to the next stage of 3G evolution- fully operational mobile broadband Describes the new technologies selected by the 3GPP to realise High Speed Packet Access (HSPA) and Long Term Evolution (LTE) for mobile broadband Gives both higher-level overviews and detailed explanations of HSPA and LTE as specified by 3GPP
Book Synopsis Proceedings of Sixth International Congress on Information and Communication Technology by : Xin-She Yang
Download or read book Proceedings of Sixth International Congress on Information and Communication Technology written by Xin-She Yang and published by Springer Nature. This book was released on 2021-09-09 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers selected high-quality research papers presented at the Sixth International Congress on Information and Communication Technology, held at Brunel University, London, on February 25–26, 2021. It discusses emerging topics pertaining to information and communication technology (ICT) for managerial applications, e-governance, e-agriculture, e-education and computing technologies, the Internet of things (IoT) and e-mining. Written by respected experts and researchers working on ICT, the book offers a valuable asset for young researchers involved in advanced studies. The book is presented in four volumes.
Book Synopsis Optical Communication Networks by : Biswanath Mukherjee
Download or read book Optical Communication Networks written by Biswanath Mukherjee and published by McGraw-Hill Companies. This book was released on 1997 with total page 616 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 Quantum Communications and Cryptography by : Alexander V. Sergienko
Download or read book Quantum Communications and Cryptography written by Alexander V. Sergienko and published by CRC Press. This book was released on 2018-10-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.
Book Synopsis Microwave Scanning Antennas: Apertures by : Robert C. Hansen
Download or read book Microwave Scanning Antennas: Apertures written by Robert C. Hansen and published by . This book was released on 1964 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultra Wide Band Antennas by : Xavier Begaud
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.
Book Synopsis Experimental Chaos by : Stefano Boccaletti
Download or read book Experimental Chaos written by Stefano Boccaletti and published by A I P Press. This book was released on 2004-12-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th Experimental Chaos Conference again demonstrated the broad spectrum of areas where nonlinear dynamics plays an important role, such as circuits, hydrodynamics, optics, chemistry, fracture dynamics, neuroscience, and cognitive science. Additional contributions outline the trends for development and application of concepts and techniques of nonlinear dynamics.
Download or read book Annales des télécommunications written by and published by . This book was released on 2003 with total page 1960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Communications by : Robert M. Gagliardi
Download or read book Optical Communications written by Robert M. Gagliardi and published by Wiley-Interscience. This book was released on 1995-02-20 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Updated to reflect all the advances in this rapidly emerging technology, this new edition presents new material on digital communications, fiber optics and most lightwave networks. It also emphasizes the system aspects of optical communications rather than dwelling on detailed hardware device descriptions.
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)
Book Synopsis The Path to Hope by : Stephane Hessel
Download or read book The Path to Hope written by Stephane Hessel and published by Other Press, LLC. This book was released on 2012-04-24 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: An incisive political tract that calls for a return to humanist values: equality, liberty, a return to community, mutual respect, freedom from poverty, and an end to theocracy and fundamentalism. The authors argue that a return to these values constitutes “a path to hope,” leading the way out of the present worldwide malaise brought on by economic collapse, moral failure, and an ignorance of history. For the authors, 20th-century fascism was no mere abstraction—it was a brutal system brought on by a similar malaise, a system they fought against. The uncertainly of our current political moment gives their book special urgency. The Path to Hope is written by two esteemed French thinkers—Stephane Hessel, editor of the 1948 Universal Declaration of Human Rights, and renowned philosopher and sociologist Edgar Morin. Their writings have become bestsellers throughout Europe, and have also become foundational documents underpinning the worldwide protest movement.
