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Author :
Publisher :
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.3/5 (91 download)
Download or read book Antennas & Propagation (ICAP 2003) written by and published by . This book was released on 2003 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bogdan Ghita
Publisher : Springer Nature
ISBN 13 : 3030647587
Total Pages : 246 pages
Book Rating : 4.0/5 (36 download)
Download or read book Selected Papers from the 12th International Networking Conference written by Bogdan Ghita and published by Springer Nature. This book was released on 2021-01-04 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings includes a selection of papers covering a range of subjects focusing on topical areas of computer networks and security with a specific emphasis of novel environments, ranging from 5G and virtualised infrastructures to Internet of things, smart environments and cyber security issues. Networking represents the underlying core of current IT systems, providing the necessary communication support for complex infrastructures. Recent years have witnessed a number of novel concepts moving from theory to large scale implementations, such as Software Defined Networking, Network Function Virtualisation, 5G, smart environments, and IoT. These concepts change fundamentally the paradigms used in traditional networking, with a number of areas such as network routing and system or business security having to adjust or redesign to accommodate them. While the benefits are clear, through the advent of new applications, use cases, improved user interaction and experience, they also introduce new challenges for generic network architectures, mobility, security, traffic engineering.
Author : Jie Zhang
Publisher : John Wiley & Sons
ISBN 13 : 1119965659
Total Pages : 286 pages
Book Rating : 4.1/5 (199 download)
Download or read book Femtocells written by Jie Zhang and published by John Wiley & Sons. This book was released on 2011-09-26 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an in-depth guide to femtocell technologies In this book, the authors provide a comprehensive and organized explanation of the femtocell concepts, architecture, air interface technologies, and challenging issues arising from the deployment of femtocells, such as interference, mobility management and self-organization. The book details a system level simulation based methodology addressing the key concerns of femtocell deployment such as interference between femto and macrocells, and the performance of both femto and macrocell layers. In addition, key research topics in interference modeling and mitigation, mobility management and Self-Organizing Network (SON) are highlighted. The authors also introduce HNB/HeNB standardization in 3GPP.. Furthermore, access methods (closed, open and hybrid), applications, timing synchronization, health issues, business models and security are discussed. The authors also provide a comparison between femtocells and other indoor coverage techniques such as picocells, repeaters, distributed antenna systems and radio over fiber. Lastly, both CDMA and OFDMA based femtocells are covered. Key Features: Provides a comprehensive reference on femtocells and related topics Offers the latest research results on femtocells based on simulation and measurements Gives an overview of indoor coverage techniques such as picocells, repeaters, distributed antenna systems, radio over fiber and femtocells Includes chapters on femtocell access network architecture, air interface technologies (GSM, UMTS, HSPA, WiMAX and LTE), femtocell simulation, interference analysis and mitigation in femto/macrocell networks, mobility management in femto/macrocell networks, femtocell self-organization and other key challenges such as timing synchronization and security faced by femtocell deployment Points to over 240 references from 3GPP, The Femto Forum, journals and conference proceedings This book will be an invaluable guide for RF engineers from operators, R&D engineers from femtocells hardware manufacturers, employees from regulatory bodies, radio network planners, academics and researchers from universities and research organizations. Students undertaking wireless communications courses will also find this book insightful.
Author : Simon R. Saunders
Publisher : John Wiley & Sons
ISBN 13 : 0470848790
Total Pages : 547 pages
Book Rating : 4.4/5 (78 download)
Download or read book Antennas and Propagation for Wireless Communication Systems written by Simon R. Saunders and published by John Wiley & Sons. This book was released on 2007-05-07 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antennas and propagation are of fundamental importance to the coverage, capacity and quality of all wireless communication systems. This book provides a solid grounding in antennas and propagation, covering terrestrial and satellite radio systems in both mobile and fixed contexts. Building on the highly successful first edition, this fully updated text features significant new material and brand new exercises and supplementary materials to support course tutors. A vital source of information for practising and aspiring wireless communication engineers as well as for students at postgraduate and senior undergraduate levels, this book provides a fundamental grounding in the principles of antennas and propagation without excessive recourse to mathematics. It also equips the reader with practical prediction techniques for the design and analysis of a very wide range of common wireless communication systems. Including: Overview of the fundamental electromagnetic principles underlying propagation and antennas. Basic concepts of antennas and their application to specific wireless systems. Propagation measurement, modelling and prediction for fixed links, macrocells, microcells, picocells and megacells Narrowband and wideband channel modelling and the effect of the channel on communication system performance. Methods that overcome and transform channel impairments to enhance performance using diversity, adaptive antennas and equalisers. Key second edition updates: New chapters on Antennas for Mobile Systems and Channel Measurements for Mobile Radio Systems. Coverage of new technologies, including MIMO antenna systems, Ultra Wideband (UWB) and the OFDM technology used in Wi-Fi and WiMax systems. Many new propagation models for macrocells, microcells and picocells. Fully revised and expanded end-of-chapter exercises. The Solutions Manual can be requested from www.wiley.com/go/saunders_antennas_2e
Author :
Publisher : Lulu.com
ISBN 13 : 1841021881
Total Pages : 291 pages
Book Rating : 4.8/5 (41 download)
Download or read book Proceedings of the Seventh International Network Conference (INC 2008) written by and published by Lulu.com. This book was released on with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : British Library. Document Supply Centre
Publisher :
ISBN 13 :
Total Pages : 870 pages
Book Rating : 4.F/5 ( download)
Download or read book Index of Conference Proceedings written by British Library. Document Supply Centre and published by . This book was released on 2003 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xiaodong Chen
Publisher : John Wiley & Sons
ISBN 13 : 1119993679
Total Pages : 232 pages
Book Rating : 4.1/5 (199 download)
Download or read book Antennas for Global Navigation Satellite Systems written by Xiaodong Chen and published by John Wiley & Sons. This book was released on 2012-04-23 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the fundamentals and practical implementations of antennas for Global Navigation Satellite Systems (GNSS) In this book, the authors discuss the various aspects of GNSS antennas, including fundamentals of GNSS, design approaches for the GNSS terminal and satellite antennas, performance enhancement techniques and effects of user’s presence and surrounding environment on these antennas. In addition, the book will provide the reader with an insight into the most important aspects of the GNSS antenna technology and lay the foundations for future advancements. It also includes a number of real case studies describing the ways in which antenna design can be adapted to conform to the design constraints of practical user devices, and also the management of potential adverse interactions between the antenna and its platform. Key Features: Covers the fundamentals and practical implementations of antennas for Global Navigation Satellite Systems (GNSS) Describes technological advancements for GPS, Glonass, Galileo and Compass Aims to address future issues such as multipath interference, in building operation, RF interference in mobile Includes a number of real case studies to illustrate practical implementation of GNSS This book will be an invaluable guide for antenna designers, system engineers, researchers for GNSS systems and postgraduate students (antennas, satellite communication technology). R&D engineers in mobile handset manufacturers, spectrum engineers will also find this book of interest.
Author : Theodore S. Rappaport
Publisher : Cambridge University Press
ISBN 13 : 1009301888
Total Pages : 306 pages
Book Rating : 4.0/5 (93 download)
Download or read book Radio Propagation Measurements and Channel Modeling: Best Practices for Millimeter-Wave and Sub-Terahertz Frequencies written by Theodore S. Rappaport and published by Cambridge University Press. This book was released on 2022-08-31 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers comprehensive, practical guidance on RF propagation channel characterization at mmWave and sub-terahertz frequencies, with an overview of both measurement systems and current and future channel models. It introduces the key concepts required for performing accurate mmWave channel measurements, including channel sounder architectures, calibration methods, channel sounder performance metrics and their relationship to propagation channel characteristics. With a comprehensive introduction to mmWave channel models, the book allows readers to carefully review and select the most appropriate channel model for their application. The book provides fundamental system theory accessible in a step by step way with clear examples throughout. With inter- and multidisciplinary perspectives, the reader will observe the tight interaction between measurements and modeling for these frequency bands and how different disciplines interact. This is an excellent reference for researchers, including graduate students, working on mmWave and sub-THz wireless communications, and for engineers developing communication systems.
Author : Moeness G. Amin
Publisher : CRC Press
ISBN 13 : 1351834037
Total Pages : 647 pages
Book Rating : 4.3/5 (518 download)
Download or read book Through-the-Wall Radar Imaging written by Moeness G. Amin and published by CRC Press. This book was released on 2017-12-19 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through-the-wall radar imaging (TWRI) allows police, fire and rescue personnel, first responders, and defense forces to detect, identify, classify, and track the whereabouts of humans and moving objects. Electromagnetic waves are considered the most effective at achieving this objective, yet advances in this multi-faceted and multi-disciplinary technology require taking phenomenological issues into consideration and must be based on a solid understanding of the intricacies of EM wave interactions with interior and exterior objects and structures. Providing a broad overview of the myriad factors involved, namely size, weight, mobility, acquisition time, aperture distribution, power, bandwidth, standoff distance, and, most importantly, reliable performance and delivery of accurate information, Through-the-Wall Radar Imaging examines this technology from the algorithmic, modeling, experimentation, and system design perspectives. It begins with coverage of the electromagnetic properties of walls and building materials, and discusses techniques in the design of antenna elements and array configurations, beamforming concepts and issues, and the use of antenna array with collocated and distributed apertures. Detailed chapters discuss several suitable waveforms inverse scattering approaches and revolve around the relevance of physical-based model approaches in TWRI along with theoretical and experimental research in 3D building tomography using microwave remote sensing, high-frequency asymptotic modeling methods, synthetic aperture radar (SAR) techniques, impulse radars, airborne radar imaging of multi-floor buildings strategies for target detection, and detection of concealed targets. The book concludes with a discussion of how the Doppler principle can be used to measure motion at a very fine level of detail. The book provides a deep understanding of the challenges of TWRI, stressing its multidisciplinary and phenomenological nature. The breadth and depth of topics covered presents a highly detailed treatment of this potentially life-saving technology.
Author : Jacopo Iannacci
Publisher : John Wiley & Sons
ISBN 13 : 3527673946
Total Pages : 374 pages
Book Rating : 4.5/5 (276 download)
Download or read book Practical Guide to RF-MEMS written by Jacopo Iannacci and published by John Wiley & Sons. This book was released on 2013-08-12 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Closes the gap between hardcore-theoretical and purely experimental RF-MEMS books. The book covers, from a practical viewpoint, the most critical steps that have to be taken in order to develop novel RF-MEMS device concepts. Prototypical RF-MEMS devices, both including lumped components and complex networks, are presented at the beginning of the book as reference examples, and these are then discussed from different perspectives with regard to design, simulation, packaging, testing, and post-fabrication modeling. Theoretical concepts are introduced when necessary to complement the practical hints given for all RF-MEMS development stages. Provides researchers and engineers with invaluable practical hints on how to develop novel RF-MEMS device concepts Covers all critical steps, dealing with design, simulation, optimization, characterization and fabrication of MEMS for radio-frequency applications Addresses frequently disregarded issues, explicitly treating the hard to predict interplay between the three-dimensional device structure and its electromagnetic functionality Bridges theory and experiment, fundamental concepts are introduced with the application in mind, and simulation results are validated against experimental results Appeals to the practice-oriented R&D reader: design and simulation examples are based on widely known software packages such as ANSYS and the hardware description language Verilog.
Author : Grau, Sebastian
Publisher : Universitätsverlag der TU Berlin
ISBN 13 : 3798330263
Total Pages : 174 pages
Book Rating : 4.7/5 (983 download)
Download or read book Contributions to the advance of the integration density of CubeSats written by Grau, Sebastian and published by Universitätsverlag der TU Berlin. This book was released on 2019-09-17 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates potential technologies to increase the integration density of CubeSats. Observations of the CubeSat market and missions are recorded in order to derive design criteria for high performance single unit CubeSats. A promising approach to increased integration density is relocation of the components of multiple satellite subsystems to form a highly integrated, multi-functional solar panel. Eligible components are usually allocated to the communication system, the electric power system, or the attitude determination and control system. In a joint research project, development, optimization, and miniaturization of those components in order to form a highly integrated, multi-functional solar panel is investigated. The author first summarizes the development work of the project partners for a picosatellite solar antenna and puts it into relation to the overall solar panel design. Advantage of using solar antennas over simple patch antennas is the reduced loss of solar cell area, and hence available electric power, that is usually accompanied by the usage of higher frequency bands for broadband payload data transmission. Magnetic attitude actuators are the backbone of CubeSat attitude control. In order to increase their performance and lower their resource consumption, numerical optimization of the commonly used three coil types is investigated by the author. This leads to the formulation of a novel optimization approach, which is better suited to real-world considerations for magnetic actuator design. Results from the application of the optimization procedure show potential for every coil type. The state of the art of a novel type of attitude control actuators, so-called fluid-dynamic actuators which are based on angular momentum exchange, is advanced by the author by introducing miniaturized 3D-printed conduits for single unit CubeSat applications. Following development and functional verification, actuators are compared to existing reaction wheel systems, which shows their superiority for agile attitude maneuvers and integration with the satellite bus. Further investigation exploits additive manufacturing technologies to create redundancy concepts using four actuators with three-dimensional conduits.Finally, development, optimization, and miniaturization of subsystem components is brought together in the design, assembly, and test of a highly integrated, multi-functional solar panel. Analysis of a single unit CubeSat design that applies different configurations of the multi-functional solar panel shows the potential for more than 50% payload mass and payload volume. This brings integration density of single unit CubeSats to a level similar to that of the larger triple unit form factors currently employed for the New Space mega-constellations. Diese Dissertation untersucht mögliche Technologien zur Erhöhung der Integrationsdichte von CubeSats. Beobachtungen des CubeSat-Marktes und ausgewählter Missionen werden zusammengetragen um Entwurfskriterien für hochperformante 1U CubeSats abzuleiten. Ein vielversprechender Ansatz zur Erhöhung der Integrationsdichte ist der Umzug von Komponenten verschiedener Satellitensubsysteme auf ein zu entwickelndes hochintegriertes, multifunktionales Solarpaneel. Infrage kommende Komponenten sind für gewöhnlich dem Kommunikationssystem, dem Energieversorgungssystem, oder dem Lageregelungssystem zugeordnet. In Rahmen eines gemeinschaftlichen Forschungsvorhabens wurden Entwicklung, Optimierung, und Miniaturisierung ausgewählter Komponenten eines solchen hochintegrierten, multifunktionalen Paneels untersucht. Durch den Autor wird zunächst die Entwicklung einer Solarantenne für Pikosatelliten durch den Projektpartner zusammengefasst und in Zusammenhang um Entwurf des Solarpaneels gebracht. Der Vorteil einer Solarantenne gegenüber einer einfachen Patch-Antenne ist der geringere Verlust an Solarzellenfläche, und damit zur Verfügung stehender elektrischer Leistung, der üblicherweise mit der Verwendung höherer Frequenzbänder zur breitbandigen Nutzlastdatenübertragung einhergeht. Magnetische Lageregelungsaktuatoren bilden das Rückgrat der CubeSat-Lageregelung. Um deren Leistungsfähigkeit zu erhöhen und den Ressourcenverbrauch zu verringern, wird durch den Autor die numerische Optimierung der drei gebräuchlichen Spulentypen untersucht. Dies führt zur Formulierung eines neuartigen Optimierungsansatzes welcher besser für die Anwendung realer Entwurfsprobleme geeignet ist. Die Optimierungsergebnisse zeigen ein großes Potential für die Optimierung aller betrachteter Spulentypen auf. Der Stand der Technik im Bereich neuartiger Lageregelungsaktuatoren, den sogenannten fluiddynamischen Aktuatoren die auf Drehimpulsaustausch basieren, wird durch den Autor durch die Einführung miniaturisierter 3D-gedruckter Kanäle für die Verwendung auf 1U CubeSats vorangebracht. Im Anschluss an die Entwicklung und funktionale Verifikation werden diese Aktuatoren mit existierenden Reaktionsradsystemen verglichen, was deren Überlegenheit bei agilen Lageregelungsmanövern und der Integration in den Satellitenbus aufzeigt. Weitere Untersuchungen nutzen die additiven Herstellungsverfahren zur Darstellung von redundanten Konzepten bestehend aus vier Aktuatoren mit dreidimensionalen Kanalgeometrien. Abschließend werden Entwicklung, Optimierung und Miniaturisierung der Subsystemkomponenten im Entwurf, Aufbau und Test eines hochintegrierten, multifunktionalen Seitenwandpaneels zusammengeführt. Die Analyse eines 1U CubeSat-Entwurfs unter Verwendung verschiedener Konfigurationen des multifunktionalen Solarpaneels zeigt ein Potential für jeweils mehr als 50% verfügbarer Nutzlastmasse und Nutzlastvolumen vom gesamten Satelliten. Dies hebt die Integrationsdichte von 1U CubeSats auf ein ähnliches Niveau der 3U Formfaktoren, welche gegenwärtig bei den New Space Megakonstellationen zur Anwendung kommen.
Author : Zhijun Zhang
Publisher : John Wiley & Sons
ISBN 13 : 1119132355
Total Pages : 335 pages
Book Rating : 4.1/5 (191 download)
Download or read book Antenna Design for Mobile Devices written by Zhijun Zhang and published by John Wiley & Sons. This book was released on 2017-06-13 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expanded and updated, this practical guide is a one-stop design reference containing all an engineer needs when designing antennas Integrates state-of-the-art technologies with a special section for step-by-step antenna design Features up-to-date bio-safety and electromagnetic compatibility regulation compliance and latest standards Newly updated with MIMO antenna design, measurements and requirements Accessible to readers of many levels, from introductory to specialist Written by a practicing expert who has hired and trained numerous engineers
Author : Constantine A. Balanis
Publisher : John Wiley & Sons
ISBN 13 : 1118209753
Total Pages : 1617 pages
Book Rating : 4.1/5 (182 download)
Download or read book Modern Antenna Handbook written by Constantine A. Balanis and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 1617 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most up-to-date, comprehensive treatment of classical and modern antennas and their related technologies Modern Antenna Handbook represents the most current and complete thinking in the field of antennas. The handbook is edited by one of the most recognizable, prominent, and prolific authors, educators, and researchers on antennas and electromagnetics. Each chapter is authored by one or more leading international experts and includes cover-age of current and future antenna-related technology. The information is of a practical nature and is intended to be useful for researchers as well as practicing engineers. From the fundamental parameters of antennas to antennas for mobile wireless communications and medical applications, Modern Antenna Handbook covers everything professional engineers, consultants, researchers, and students need to know about the recent developments and the future direction of this fast-paced field. In addition to antenna topics, the handbook also covers modern technologies such as metamaterials, microelectromechanical systems (MEMS), frequency selective surfaces (FSS), and radar cross sections (RCS) and their applications to antennas, while five chapters are devoted to advanced numerical/computational methods targeted primarily for the analysis and design of antennas.
Author : Marc Engels
Publisher : Springer Science & Business Media
ISBN 13 : 0387345930
Total Pages : 222 pages
Book Rating : 4.3/5 (873 download)
Download or read book Broadband Fixed Wireless Access written by Marc Engels and published by Springer Science & Business Media. This book was released on 2006-12-06 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory volume provides a systematic overview of WiMAX technology, demystifing the technology and providing technical advice on various system trade-offs. Much of the material is based on the practical experiences of the authors in building new systems. Coverage includes the IEEE 802.16 standard, a tutorial on implementation and tips on controlling cost of WiMAX network ownership. This is a must read book for professionals involved in broadband fixed wireless access.
Author :
Publisher :
ISBN 13 :
Total Pages : 744 pages
Book Rating : 4.:/5 (31 download)
Download or read book Proceedings of ... International Conference on Information, Communications, and Signal Processing written by and published by . This book was released on 2003 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alessandro Chiuso
Publisher : Springer
ISBN 13 : 3642031994
Total Pages : 246 pages
Book Rating : 4.6/5 (42 download)
Download or read book Modelling, Estimation and Control of Networked Complex Systems written by Alessandro Chiuso and published by Springer. This book was released on 2009-10-13 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paradigm of complexity is pervading both science and engineering, le- ing to the emergence of novel approaches oriented at the development of a systemic view of the phenomena under study; the de?nition of powerful tools for modelling, estimation, and control; and the cross-fertilization of di?erent disciplines and approaches. One of the most promising paradigms to cope with complexity is that of networked systems. Complex, dynamical networks are powerful tools to model, estimate, and control many interesting phenomena, like agent coordination, synch- nization, social and economics events, networks of critical infrastructures, resourcesallocation,informationprocessing,controlovercommunicationn- works, etc. Advances in this ?eld are highlighting approaches that are more and more oftenbasedondynamicalandtime-varyingnetworks,i.e.networksconsisting of dynamical nodes with links that can change over time. Moreover, recent technological advances in wireless communication and decreasing cost and size of electronic devices are promoting the appearance of large inexpensive interconnected systems, each with computational, sensing and mobile ca- bilities. This is fostering the development of many engineering applications, which exploit the availability of these systems of systems to monitor and control very large-scale phenomena with ?ne resolution.
Author :
Publisher :
ISBN 13 :
Total Pages : 404 pages
Book Rating : 4.:/5 (318 download)
Download or read book Annali Di Geofisica written by and published by . This book was released on 2004 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
