Wireless Communications

Author: Andrea Goldsmith

Publisher: Cambridge University Press

ISBN: 9780521837163

Category: Computers

Page: 644

View: 3395

A comprehensive introduction to the basic principles, design techniques and analytical tools of wireless communications.

Personal Wireless Communications

The 12th IFIP International Conference on Personal Wireless Communications (PWC 2007), Prague, Czech Republic, September 2007

Author: Robert Bestak,Boris Simak,Ewa Kozlowska

Publisher: Springer

ISBN: 0387741593

Category: Technology & Engineering

Page: 680

View: 745

The International conference on Personal Wireless Communications (PWC 2007) was the twelfth conference of its series aimed at stimulating technical exchange between researchers, practitioners and students interested in mobile computing and wireless networks. The program covered a variety of research topics that are of current interest, including Ad-Hoc Networks, WiMAX, Heterogeneous Networks, Wireless Networking, QoS and Security, Sensor Networks, Multicast and Signal processing.

TDD-CDMA for Wireless Communications

Author: Riaz Esmailzadeh,Masao Nakagawa

Publisher: Artech House

ISBN: 9781580537636

Category: Technology & Engineering

Page: 190

View: 3615

A comprehensive description of TDD-CDMA technology. It covers the important TDD-based standards, including the 3GPPs TD-CDMA for UMTS, and TD-SCDMA, the Chinese 3G standard. The authors also discuss the differences between the TDD and FDD modes of CDMA.

High-Altitude Platforms for Wireless Communications

Author: Alejandro Aragón-Zavala,José Luis Cuevas-Ruíz,José Antonio Delgado-Penín

Publisher: John Wiley & Sons

ISBN: 0470997427

Category: Technology & Engineering

Page: 256

View: 3960

Provides an introduction to High-Altitude Platform Stations (HAPS) technology and its applications for wireless communications High-altitude platform stations offer a promising new technology that combines the benefits of terrestrial and satellite communication systems for delivering broadband communications to users at a low cost. They are easily deployable and easy to maintain, which is why they offer a good alternative for network operators who need to find ways to get more coverage to satisfy the increasing demand for more capacity. HAPS are usually balloons, airships or unmanned aerial systems (UAS) located in the stratosphere. An enormous interest has grown worldwide to examine their use not only for broadband communications, but also for emergency services, navigation, traffic monitoring, cellular, etc. Key features include: Unique book focusing on emerging HAPS technology and its applications Provides a thorough overview of the technology including HAPS-based communications systems, antennas for HAPS, radio propagation and channel modelling issues and HAPS networking aspects Presents various HAPS-related projects and initiatives developed throughout the world (North America, Europe and Asia-Pacific) Features a comprehensive overview on both aeronautical and telecommunications regulatory aspects, which will affect the deployment and future developments in the field of HAPS High-Altitude Platform Systems for Wireless Communications will prove essential reading for postgraduate students in the field of HAPS, engineers, developers and designers involved in the design and maintenance of HAPS, aerospace engineers, and communications system planners and researchers.

Introduction to Ultra Wideband for Wireless Communications

Author: Homayoun Nikookar,Ramjee Prasad

Publisher: Springer Science & Business Media

ISBN: 9781402066337

Category: Technology & Engineering

Page: 188

View: 3655

asakta-buddhih sarvatra . jitatma vigata-sprhah . . . . naiskarmya-siddhim paramam . sannyasenadhigacchati Detached by spiritual intelligence from everything controlling the mind, without material desires, one attains the paramount perfection in cessation of re- tions by renunciation. The Bhagvad Gita (18.49) Compared to traditional carrier-based, Ultra-Wide Band (UWB), or carrier-less, systems implement new paradigms in terms of signal generation and reception. Thus, designing an UWB communication system requires the understanding of how excess bandwidth and very low transmitted powers can be used jointly to provide a reliable radio link. UWB offers systems transceiver potential for very simple implementations. Comparison between UWB and traditional narrow-band systems highlights the following features: Large bandwidth enables very fine time-space resolution for accurate lo- tion of the UWB nodes and for distributing network time stamps. Very short pulses are effectively counter-fighting the channel effect in very dense multipath environments. Data rate (number of pulses transmitted per bit) can be traded with power emission control and distance coverage. Very low power density leads to low probability of signal detection and adds security for all the layers of the communication stack. Very low power density is obtained through radio regulation emission masks; UWB systems are suitable for coexistence with already deployed narrow-band systems.

Wireless Communications

Theory and Techniques

Author: Asrar U.H. Sheikh

Publisher: Springer Science & Business Media

ISBN: 1441991522

Category: Science

Page: 750

View: 1074

Wireless communication systems, since their inception in the form of cellular communications, have spread rapidly throughout the western world and the trend is catching on in the developing countries as well. These sys tems have caused revolutionary changes in the way we live. Cellular Commu nications have become important both as means of communication and as a new domain ofcommercial enterprise. Hand held telephones are now rapidly replacing the fixed telephone and in less than twenty years, the number of subscribers has reached nearly three quarters of a billion. In a short span of twenty years, the cellular communications progressed from the first genera tion to the third generation systems, which started operations in Japan on October 1,2001. The first generation wireless technology, which was thought to be obsolete is now being used for fixed wired telephony in several coun tries of Asia, Africa and Latin America. As some commentator said in 1983, the cellular system is the best thing that has happened in telecommunications since the introduction ofcomputers to the masses. This book is written to provide readers with the fundamental concepts ofwireless communications. It is intended for a graduate course on wireless communications but it could be easily adopted at the senior level by skipping material involving difficult mathematical manipulations. The text does not go through the rigorous material on mathematical treatment of electromagnetic waves and propagation, rather it emphasizes more on the practical aspects of this.

An Analysis of Regulatory Frameworks for Wireless Communications, Societal Concerns and Risk

The Case of Radio Frequency (RF) Allocation and Licensing

Author: Haim Mazar

Publisher: Universal-Publishers

ISBN: 1599427109

Category: Political Science

Page: 330

View: 7396

This thesis analyses how and why culture and geography influence the allocation and licensing of the radio frequency (RF) spectrum in different nations. Based on a broad comparative study of 235 countries, an inter-disciplinary approach is used to explore regulatory frameworks and attitudes toward risk. In addition, detailed case studies of the UK, France, the US and Ecuador provide deeper insights into the main contrasting regulatory styles. Three alternative sociological theories are used to analyse and explain the results for both the in-depth and broad brush studies. The Cultural Theory of Mary Douglas and co-workers is first used to categorise countries in terms of perceptual filters. The empirical findings indicate some countries to be apparently exceptional in their behaviour. The theory of Bounded Rationality is used to investigate and explain these apparent irrationalities. Finally, Rational Field Theory shows how beliefs and values guide administrations in their RF regulation. A number of key factors are found to dominate and patterns emerge. The European RF harmonisation is unique. Following European unification, wireless regulation is divided into two major camps (the EU and the US), which differ in their risk concerns, approach to top-down mandated standards, allocation of RF spectrum to licence-exempt bands and type approval process. The adoption of 3G cellular (UMTS versus CDMA2000) and digital TV standards (DVB-T/ATSC/ISDB-T) around the world reflects geopolitical and colonial influence. The language of a country is a significant indicator of its analogue TV standard (SECAM/PAL/NTSC). Interestingly, the longitude of a country to a fair extent defines RF allocation: Africa and West Asia follow Europe, whereas the Americas approximate the US. RF regulation and risk tolerability differ between tropical and non-tropical climates. The collectivised/centralised versus the individualised/market-based rationalities result in different regulatory frameworks and contrasting societal and risk concerns. The success of the top-down European GSM and the bottom-up Wi-Fi standards reveal how the central-planning and market-based approaches have thrived. Attitudes to RF human hazards and spurious emissions levels reveal that the US, Canada and Japan are more tolerant of these radiation risks than Europe. Australia, Canada, New Zealand, UK and USA encourage technological innovation. A practical benefit of this study is that it will give regulators more freedom to choose a rational RF licensing protocol, by better understanding the possibly self-imposed boundaries of cultural and geographical factors which are currently shaping allocation. Academically, there is utility in undertaking a cultural and geographic analysis of a topic that is mostly the domain of engineering, economic and legal analysts.

Wireless Communications Design Handbook

Terrestrial and Mobile Interference: Aspects of Noise, Interference, and Environmental Concerns

Author: Reinaldo Perez

Publisher: Elsevier

ISBN: 9780080543833

Category: Technology & Engineering

Page: 184

View: 580

Most books in wireless communications address technical subjects which are relevant to ground mobile systems. Volume 2: Terrestrial and Mobile Interference of the Wireless Communications Design Handbook addresses a topic frequently overlooked in ground mobile wireless system design: interference problems at the hardware level. This book employes a hardware-oriented approach, which is the most effective approach for addressing interference and noise problems in ground mobile wireless systems. The book is a practical reference for engineers who are particularly interested in practical case studies covering how to avoid undesired interference and noise problems in their designs. It covers some of the most common interference models usually addressed, and it describes material related to transmitter and receiver hardware design and how interference control plays a significant role in equipment performance. Each of the three Wireless Communications Design Handbook volumes addresses theory and immediate applications. Design issues are also considered in detail for the protection of wireless ground systems against interference. An applications-oriented reference for engineers, system designers, and practitioners Addresses the most common interference concerns in ground mobile wireless communications systems Provides a hardware-oriented approach for addressing trasmitter and receiver interference issues, as well as ground mobile designs Gives extensive detail regarding noise and interference control solutions for grounded wireless facilities Details the space interference effect in ground mobile systems Discusses hardware issues ranging from digital phones to ground stations

OFDM for Wireless Communications Systems

Author: Ramjee Prasad

Publisher: Artech House

ISBN: 9781580537995

Category: Electronic books

Page: 272

View: 7738

Written by leading authority Ramjee Prasad, this timely new work offers a complete understanding of OFDM technology and applications in wireless communications systems, placing emphasis on wireless LANs and PANs. OFDM is a key technology for beyond 3G communications, promising robust, high capacity, high speed wireless broadband multimedia networks. In this practical resource, established and new technologies are explained clearly and comprehensively, from OFDM basics to a detailed account of a new technique, hybrid OFDM CDMA slow frequency hopping.

Simplified Robust Adaptive Detection and Beamforming for Wireless Communications

Author: Ayman Elnashar

Publisher: John Wiley & Sons

ISBN: 1118938240

Category: Technology & Engineering

Page: 424

View: 3460

This book presents an alternative and simplified approaches for the robust adaptive detection and beamforming in wireless communications. It adopts several systems models including DS/CDMA, OFDM/MIMO with antenna array, and general antenna arrays beamforming model. It presents and analyzes recently developed detection and beamforming algorithms with an emphasis on robustness. In addition, simplified and efficient robust adaptive detection and beamforming techniques are presented and compared with exiting techniques. Practical examples based on the above systems models are provided to exemplify the developed detectors and beamforming algorithms. Moreover, the developed techniques are implemented using MATLAB—and the relevant MATLAB scripts are provided to help the readers to develop and analyze the presented algorithms. em style="mso-bidi-font-style: normal;"Simplified Robust Adaptive Detection and Beamforming for Wireless Communications starts by introducing readers to adaptive signal processing and robust adaptive detection. It then goes on to cover Wireless Systems Models. The robust adaptive detectors and beamformers are implemented using the well-known algorithms including LMS, RLS, IQRD-RLS, RSD, BSCMA, CG, and SD. The robust detection and beamforming are derived based on the existing detectors/beamformers including MOE, PLIC, LCCMA, LCMV, MVDR, BSCMA, and MBER. The adopted cost functions include MSE, BER, CM, MV, and SINR/SNR.

Optical and Wireless Communications

Next Generation Networks

Author: Matthew N.O. Sadiku

Publisher: CRC Press

ISBN: 9780849312786

Category: Technology & Engineering

Page: 264

View: 6446

Optical and wireless technologies are being introduced into the global communications infrastructure at an astonishing pace. Both are revolutionizing the industry and will undoubtedly dominate its future, yet in the crowded curricula in most electrical engineering programs, there is no room in typical data communications courses for proper coverage of these "next generation" technologies. Optical and Wireless Communications: Next Generation Networks covers both types of networks in a unique presentation designed for a one-semester course for senior undergraduate or graduate engineering students. Part I: Optical Networks covers optical fibers, transmitters, receivers, multiplexers, amplifiers, and specific networks, including FDDI, SONET, fiber channel, and wavelength-routed networks. Part II:Wireless Networks examines fundamental concepts and specific wireless networks, such as LAN, ATM, wireless local loop, and wireless PBXs. This section also explores cellular technologies and satellite communications. Eventually, next generation networks will be as ubiquitous as traditional telephone networks, and today's engineering students must be prepared to meet the challenges of optical and wireless systems development and deployment. Filled with illustrations, examples, and end-of-chapter problems, Optical and Wireless Communications: Next Generation Networks provides a brief but comprehensive introduction to these technologies that will help future engineers build the foundation they need for success.

Wireless Communications

Author: Andreas F. Molisch

Publisher: John Wiley & Sons

ISBN: 1118355687

Category: Technology & Engineering

Page: 884

View: 1828

"Professor Andreas F. Molisch, renowned researcher and educator,has put together the comprehensive book, WirelessCommunications. The second edition, which includes a wealth ofnew material on important topics, ensures the role of the text asthe key resource for every student, researcher, and practitioner inthe field." —Professor Moe Win, MIT, USA Wireless communications has grown rapidly over the past decadefrom a niche market into one of the most important, fast movingindustries. Fully updated to incorporate the latest research anddevelopments, Wireless Communications, Second Editionprovides an authoritative overview of the principles andapplications of mobile communication technology. The author provides an in-depth analysis of current treatment ofthe area, addressing both the traditional elements, such asRayleigh fading, BER in flat fading channels, and equalisation, andmore recently emerging topics such as multi-user detection in CDMAsystems, MIMO systems, and cognitive radio. The dominant wirelessstandards; including cellular, cordless and wireless LANs; arediscussed. Topics featured include: wireless propagation channels,transceivers and signal processing, multiple access and advancedtransceiver schemes, and standardised wireless systems. Combines mathematical descriptions with intuitive explanationsof the physical facts, enabling readers to acquire a deepunderstanding of the subject. Includes new chapters on cognitive radio, cooperativecommunications and relaying, video coding, 3GPP Long TermEvolution, and WiMax; plus significant new sections on multi-userMIMO, 802.11n, and information theory. Companion website featuring: supplementary material on 'DECT',solutions manual and presentation slides for instructors,appendices, list of abbreviations and other useful resources.

Multiaccess, Mobility and Teletraffic for Wireless Communications

Author: Xavier Lagrange,Bijan Jabbari

Publisher: Springer Science & Business Media

ISBN: 9781402070839

Category: Computers

Page: 352

View: 8604

Third generation networks have been specified and are now being deployed in a few countries. They are expected to reach maturity in the next several years and to provide various services including audio, video, and world wide web browsing. Furthermore, radio terminals are expected to be integrated in a number of devices such as personal computers, personal digital assistants, and even television sets. Such a wide-usage of radio mandates ongoing research to address design of networks with high capacity while providing acceptable quality of service. This volume is the sixth in the edited series Multiaccess, Mobility and Teletraffic for Wireless Communications. It presents the selected papers for the proceedings of the Seventh Workshop (MMT'2002) held on this topic in June 2002 in Rennes, France. The aim of this workshop has been to address a set of important issues of interest to the wireless communications community. In particular, the focus of this workshop is to identify, present and discuss the theoretical and implementation issues critical to the design of land based mobile cellular and microcellular as well as wireless local area networks. Included in this book are recent research results on performance analysis of wireless packet networks, channel coding and receiver design, radio resource management in third generation systems, mobility management in cellular and mobile IP networks, performance of transport protocols (TCP) over radio link control protocols, and ad-hoc networks.

Wireless Communications & Networking

Author: Vijay Garg

Publisher: Elsevier

ISBN: 9780080549071

Category: Computers

Page: 840

View: 4699

This book provides comprehensive coverage of mobile data networking and mobile communications under a single cover for diverse audiences including managers, practicing engineers, and students who need to understand this industry. In the last two decades, many books have been written on the subject of wireless communications and networking. However, mobile data networking and mobile communications were not fully addressed in a unified fashion. This book fills that gap in the literature and is written to provide essentials of wireless communications and wireless networking, including Wireless Personal Area Networks (WPAN), Wireless Local Area Networks (WLAN), and Wireless Wide Area Networks (WWAN). The first ten chapters of the book focus on the fundamentals that are required to study mobile data networking and mobile communications. Numerous solved examples have been included to show applications of theoretical concepts. In addition, unsolved problems are given at the end of each chapter for practice. (A solutions manual will be available.) After introducing fundamental concepts, the book focuses on mobile networking aspects. Four chapters are devoted on the discussion of WPAN, WLAN, WWAN, and internetworking between WLAN and WWAN. Remaining seven chapters deal with other aspects of mobile communications such as mobility management, security, cellular network planning, and 4G systems. A unique feature of this book that is missing in most of the available books on wireless communications and networking is a balance between the theoretical and practical concepts. Moreover, this book can be used to teach a one/two semester course in mobile data networking and mobile communications to ECE and CS students. *Details the essentials of Wireless Personal Area Networks(WPAN), Wireless Local Are Networks (WLAN), and Wireless Wide Area Networks (WWAN) *Comprehensive and up-to-date coverage including the latest in standards and 4G technology *Suitable for classroom use in senior/first year grad level courses. Solutions manual and other instructor support available

Circuits for Wireless Communications

Selected Readings

Author: Banlue Srisuchinwong,Wanlop Surakampontorn,Sawasd Tantaratana

Publisher: Institute of Electrical & Electronics Engineers(IEEE)

ISBN: 9780780348288

Category: Technology & Engineering

Page: 649

View: 2265

Wireless communications is one of the fastest growing areas of communications technology. This book presents current and classic papers on circuits for wireless communications. Selected by three experts in the field, the text should be useful for students, engineers just beginning to work in cellular communications and experienced engineers who want a convenient and useful reference source.

Voice and Audio Compression for Wireless Communications

Author: Lajos Hanzo,F. Clare A. Somerville,Jason Woodard

Publisher: John Wiley & Sons

ISBN: 9780470516027

Category: Technology & Engineering

Page: 880

View: 7118

Voice communications remains the most important facet of mobile radio services, which may be delivered over conventional fixed links, the Internet or wireless channels. This all-encompassing volume reports on the entire 50-year history of voice compression, on recent audio compression techniques and the protection as well as transmission of these signals in hostile wireless propagation environments. Audio and Voice Compression for Wireless and Wireline Communications, Second Edition is divided into four parts with Part I covering the basics, while Part II outlines the design of analysis-by-synthesis coding, including a 100-page chapter on virtually all existing standardised speech codecs. The focus of Part III is on wideband and audio coding as well as transmission. Finally, Part IV concludes the book with a range of very low rate encoding techniques, scanning a range of research-oriented topics. Fully updated and revised second edition of “Voice Compression and Communications”, expanded to cover Audio features Includes two new chapters, on narrowband and wideband AMR coding, and MPEG audio coding Addresses the new developments in the field of wideband speech and audio compression Covers compression, error resilience and error correction coding, as well as transmission aspects, including cutting-edge turbo transceivers Presents both the historic and current view of speech compression and communications. Covering fundamental concepts in a non-mathematical way before moving to detailed discussions of theoretical principles, future concepts and solutions to various specific wireless voice communication problems, this book will appeal to both advanced readers and those with a background knowledge of signal processing and communications.

Radiowave Propagation and Smart Antennas for Wireless Communications

Author: Ramakrishna Janaswamy

Publisher: Springer Science & Business Media

ISBN: 0792372417

Category: Technology & Engineering

Page: 312

View: 1606

Useful as a text as well as a reference, this is one of the first books of its kind to combine basic and advanced topics of radiowave propagation and smart antennas into a single volume. The book is interdisciplinary in nature and contains material drawn from the electromagnetics and communications areas. Physical phenomena leading to the modeling and prediction of path loss, and characterizing the small-scale and medium-scale fluctuations of the received signal, are treated in detail. Several new path loss models are included. Both narrowband and wideband radio channel characterizations are discussed. Statistical descriptions of geometrically based single bounce scattering models that are useful in developing spatial channel models for smart arrays are presented. Principles of diversity and smart antennas for reducing fading and co-channel interference are presented. Performance evaluation of these arrays in the presence of fading and shadowing is treated. Both TDMA and CMDA systems are considered. Effects of element mutual coupling and correlation in limiting the system performance are elaborated. Finally, principles of multiple-input multiple-output communication systems that are increasingly becoming attractive owing to their enormous bit rate capabilities are covered. Several practical examples are worked out throughout the text. Additional problems that help the reader assimilate the material and advance to higher-level topics are included at the end of each chapter. Radiowave Propagation and Smart Antennas for Wireless Communications has been written for use in a graduate course on communications and represents a comprehensive reference for research scientists and practitioners working in fields related to the topic.