Wireless Communications

Author: Andrea Goldsmith

Publisher: Cambridge University Press

ISBN: 9780521837163

Category: Computers

Page: 644

View: 9061

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

TDD-CDMA for Wireless Communications

Author: Riaz Esmailzadeh,Masao Nakagawa

Publisher: Artech House

ISBN: 9781580537636

Category: Technology & Engineering

Page: 190

View: 1962

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.

Advances in 3G Enhanced Technologies for Wireless Communications

Author: Jiangzhou Wang,Tung-Sang Ng

Publisher: Artech House

ISBN: 9781580535557

Category: Technology & Engineering

Page: 350

View: 8154

A compilation of the cutting edge work of leading researchers and engineers from major telecommunications firms worldwide, this timely volume describes various technical regimes for implementing third generation wireless mobile communications systems, and covers the latest enhanced techniques.

OFDM for Wireless Communications Systems

Author: Ramjee Prasad

Publisher: Artech House

ISBN: 9781580537995

Category: Electronic books

Page: 272

View: 3117

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: 2940

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.

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: 1931

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.

Wireless Communications

Author: T. L. Singal

Publisher: Tata McGraw-Hill Education

ISBN: 9780070681781

Category: Wireless communication systems

Page: 669

View: 2370

Modulation and Coding

For Wireless Communications

Author: Alister Burr

Publisher: Pearson Education

ISBN: 9780201398571

Category: Technology & Engineering

Page: 360

View: 5549

"The text uses visual, graphical approaches wherever possible in order to help the reader understand abstract concepts in a familiar setting. Equally helpful to the student is the inclusion of examples from real radio systems, which help to apply and demonstrate theoretical principles. This modern text includes all the latest techniques, such as OFDM and turbo-codes, as well as looking forward to future developments."--Jacket.

Wireless Communications Circuits and Systems

Author: Yichuang Sun,Institution of Electrical Engineers

Publisher: IET

ISBN: 0852964439

Category: Computers

Page: 285

View: 2014

Wireless and mobile communications is a fast-growing area and has an enormous impact on almost every aspect of our daily lives. This book examines integrated circuits, systems and transceivers for wireless and mobile communications. It covers the most recent developments in key RF, IF, analogue, mixed-signal components and single-chip transceivers in CMOS technology, a preferred technology for system-on-chip design. The book takes a top-down approach from wireless communications systems, mobile terminals/transceivers, to constituent blocks, and systematically covers the whole range of analogue, mixed-signal, baseband, IT and RF circuits.

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: 7087

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.

Wireless Communications and Networks

3G and Beyond

Author: Iti Saha Misra

Publisher: McGraw Hill Education (India) Pvt Ltd

ISBN: 1259062732

Category: Global system for mobile communications

Page: 551

View: 4517

Multi-Mode / Multi-Band RF Transceivers for Wireless Communications

Advanced Techniques, Architectures, and Trends

Author: Gernot Hueber,Robert Bogdan Staszewski

Publisher: John Wiley & Sons

ISBN: 9781118102206

Category: Technology & Engineering

Page: 608

View: 1073

Summarizes cutting-edge physical layer technologies formulti-mode wireless RF transceivers. Includes original contributions from distinguished researchersand professionals. Covers cutting-edge physical layer technologies for multi-modewireless RF transceivers. Contributors are all leading researchers and professionals inthis field.

Multiaccess, Mobility and Teletraffic for Wireless Communications

Author: Xavier Lagrange,Bijan Jabbari

Publisher: Springer Science & Business Media

ISBN: 9781402070839

Category: Computers

Page: 352

View: 5861

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.

Detection Algorithms for Wireless Communications

With Applications to Wired and Storage Systems

Author: Gianluigi Ferrari,Giulio Colavolpe,Riccardo Raheli

Publisher: John Wiley & Sons

ISBN: 047085829X

Category: Technology & Engineering

Page: 426

View: 4089

Wireless channels are becoming more and more important, with the future development of wireless ad-hoc networks and the integration of mobile and satellite communications. To this end, algorithmic detection aspects (involved in the physical layer) will become fundamental in the design of a communication system. This book proposes a unified approach to detection for stochastic channels, with particular attention to wireless channels. The core idea is to show that the three main criteria of sequence detection, symbol detection and graph-based detection, can all be described within a general framework. This implies that a detection algorithm based on one criterion can be extended to the other criteria in a systematic manner. Presents a detailed analysis of statistical signal detection for digital signals transmitted over wireless communications Provides a unifying framework for different signal detection algorithms, such as sequence detection, symbol detection and graph-based detection, important for the design of modern digital receivers operating over mobile channels Features the hot topic of graph-based detection Detection Algorithms for Wireless Communications represents a novel contribution with respect to the current literature, with a unique focus on detection algorithms, as such it will prove invaluable to researchers working in academia and industry and in the field of wireless communications, as well as postgraduate students attending advanced courses on mobile communications.

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: 3066

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.

Optical and Wireless Communications

Next Generation Networks

Author: Matthew N.O. Sadiku

Publisher: CRC Press

ISBN: 9780849312786

Category: Technology & Engineering

Page: 264

View: 8118

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.

OFDM Systems for Wireless Communications

Author: Adarsh B. Narasimhamurthy,Cihan Tepedelenlioglu,Mahesh K. Banavar

Publisher: Morgan & Claypool Publishers

ISBN: 1598297015

Category: Technology & Engineering

Page: 68

View: 6947

Orthogonal Frequency Division Multiplexing (OFDM) systems are widely used in the standards for digital audio/video broadcasting, WiFi and WiMax. Being a frequency-domain approach to communications, OFDM has important advantages in dealing with the frequency-selective nature of high data rate wireless communication channels. As the needs for operating with higher data rates become more pressing, OFDM systems have emerged as an effective physical-layer solution. This short monograph is intended as a tutorial which highlights the deleterious aspects of the wireless channel and presents why OFDM is a good choice as a modulation that can transmit at high data rates. The system-level approach we shall pursue will also point out the disadvantages of OFDM systems especially in the context of peak to average ratio, and carrier frequency synchronization. Finally, simulation of OFDM systems will be given due prominence. Simple MATLAB programs are provided for bit error rate simulation using a discrete-time OFDM representation. Software is also provided to simulate the effects of inter-block-interference, inter-carrier-interference and signal clipping on the error rate performance. Different components of the OFDM system are described, and detailed implementation notes are provided for the programs. The program can be downloaded here. Table of Contents: Introduction / Modeling Wireless Channels / Baseband OFDM System / Carrier Frequency Offset / Peak to Average Power Ratio / Simulation of the Performance of OFDM Systems / Conclusions

Advancements and Innovations in Wireless Communications and Network Technologies

Author: Bartolacci, Michael

Publisher: IGI Global

ISBN: 1466621559

Category: Technology & Engineering

Page: 345

View: 6576

The constant advancements of wireless technologies have influenced modern business practices as well as social interaction. As a result, the continuing study of communications and networking is important to better understand existing modes of information transfer, as well as developing and managing new methods. Advancements and Innovations in Wireless Communications and Network Technologies is a collection of research and case studies which tackle the issues, advancements and techniques on wireless communications and network technologies. This book offers expansive knowledge and different perspectives useful for researchers and students alike.

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: 5387

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.

Mobile and Wireless Communications

IFIP TC6 / WG6.8 Working Conference on Personal Wireless Communications (PWC’2002) October 23–25, 2002, Singapore

Author: Cambyse Guy Omidyar

Publisher: Springer Science & Business Media

ISBN: 9781402072505

Category: Technology & Engineering

Page: 308

View: 6965

Mobile and Wireless Communications presents the latest developments in mobile and wireless research and the industry, with a broad range of topics including: -Ad-hoc networking; -Power control; -Personal communications; -Satellite; -QoS; -UMTS and wireless LANs; -Handoffs, security and mobility; -CDMA and physical layer including modulation and coding; -Methods of communication functions including multiple access, error control, flow control and routing. This state-of-the-art volume comprises the edited proceedings of the Working Conference on Personal Wireless Communications (PWC'2002), which was sponsored by the International Federation for Information Processing (IFIP), organized by IFIP Working Group 6.8, and held in Singapore in October 2002.