Growth of wireless communications is demanding increased system capacity for mobile communications satellites - digital beamforming technology provides a promising cost-effective solution to this problem. This text discusses beamforming techniques and results, state-of-the-art supportive technologies and promising applications for wireless communications.

An engineer’s guide to systems engineering of software-radio architectures

As a crucial element of wireless technology, software radio is fast becoming a hot topic in the telecommunications field. This new book provides complete, up-to-date coverage of software radio architecture, discussing in detail functions, components, design procedures for complex radio systems, and large-scale software engineering methods such as UML and CORBA. The author bridges the inter-disciplinary gap in the field, covering what software engineers need to know about how radio "waveforms" are defined in software. Plus, he provides tutorial material on how the Unified Modeling Language–UML–is used for specifying radio architecture. The architecture tradeoffs–how to deliver predictably robust performance without unnecessarily expensive hardware, economic principles, cost considerations, and marketplace trends–are also addressed. Coverage includes:

• Market-oriented technology trends on how software radio fits in with the larger telecommunications marketplace
• Complexity drivers and their influence on hardware and software components
• System integration, emphasizing the management of processing capacity available on heterogeneous ASIC, FPGA, and DSP hardware
• Subsystem material and the unique requirements that software radio brings to the hardware and software segments–antennas, RF conversion, ADC/DAC, pooled DSP, real-time operating systems, CORBA middleware, and radio software objects
• Relevant areas of systems engineering, including design tools, cost-benefit analysis, and an extended case study, "Mobile Infrastructure for Joint Military-Civilian Disaster Relief"
• Hundreds of graphs, case studies, and Internet access to software design tools (email: [email protected])

Trunked radio enables full-duplex radio communication using a single transmission frequency, making the technique more efficient in handling radio traffic. Written by an expert in this area, this book presents a much-needed discussion of trunked radio technology and its practical applications.

The role of arithmetic in datapath design in VLSI design has been increasing in importance over the last several years due to the demand for processors that are smaller, faster, and dissipate less power. Unfortunately, this means that many of these datapaths will be complex both algorithmically and circuit wise. As the complexity of the chips increases, less importance will be placed on understanding how a particular arithmetic datapath design is implemented and more importance will be given to when a product will be placed on the market. This is because many tools that are available today, are automated to help the digital system designer maximize their efficiently. Unfortunately, this may lead to problems when implementing particular datapaths. The design of high-performance architectures is becoming more compli cated because the level of integration that is capable for many of these chips is in the billions. Many engineers rely heavily on software tools to optimize their work, therefore, as designs are getting more complex less understanding is going into a particular implementation because it can be generated automati cally. Although software tools are a highly valuable asset to designer, the value of these tools does not diminish the importance of understanding datapath ele ments. Therefore, a digital system designer should be aware of how algorithms can be implemented for datapath elements. Unfortunately, due to the complex ity of some of these algorithms, it is sometimes difficult to understand how a particular algorithm is implemented without seeing the actual code."

Switchmode RF and Microwave Power Amplifiers, Third Edition is an essential reference book on developing RF and microwave switchmode power amplifiers. The book combines theoretical discussions with practical examples, allowing readers to design high-efficiency RF and microwave power amplifiers on different types of bipolar and field-effect transistors, design any type of high-efficiency switchmode power amplifiers operating in Class D or E at lower frequencies and in Class E or F and their subclasses at microwave frequencies with specified output power, also providing techniques on how to design multiband and broadband Doherty amplifiers using different bandwidth extension techniques and implementation technologies. This book provides the necessary information to understand the theory and practical implementation of load-network design techniques based on lumped and transmission-line elements. It brings a unique focus on switchmode RF and microwave power amplifiers that are widely used in cellular/wireless, satellite and radar communication systems which offer major power consumption savings.

A system-level treatment of the total realm of mobile radio communications, covering both the basic concepts and the systems themselves, to help the reader improve performance, increase productivity and save time. Part One, "Basic Concepts", provides a concise introduction to the main topics and techniques involved in mobile radio systems. It covers classic areas such as propagation and signal processing, as well as more recent techniques and concepts such as security, planning, and mobility management. In Part Two, "The Systems", there is an inside look at all categories of terrestrial mobile radio systems. Again it covers both traditional topics such as cellular and cordless systems, and more recent, such as mobile radio communications systems, paging, or radio data network systems. In fact all relevant standards are dealt with: TETRA, DECT, PHS, GSM, IS-95, PDC, CDPD, IEEE 802.11, and HYPERLAN. It demonstrates how to link budget calculations, determine the impact of mobility signalling on the network signalling load, design handover procedures and plan for cellular and capacity increases.

Radio frequency identification or RFID is a broad-based technology that impacts business and society. With the rapid expansion of the use of this technology in everything from consumer purchases to security ID tags, to tracking bird migration, there is very little information available in book form that targets the widest range of the potential market. But this book is different! Where most of the books available cover specific technical underpinnings of RFID or specific segments of the market, this co-authored book by both academic and industry professionals, provides a broad background on the technology and the various applications of RFID around the world. Coverage is mainly non-technical, more business related for the broadest user base, however there are sections that step into the technical aspects for advanced, more technical readers.

A classroom-tested book addressing key issues of electrical noise
This book examines noise phenomena in linear and nonlinear high-frequency circuits from both qualitative and quantitative perspectives. The authors explore important noise mechanisms using equivalent sources and analytical and numerical methods. Readers learn how to manage electrical noise to improve the sensitivity and resolution of communication, navigation, measurement, and other electronic systems.
Noise in High-Frequency Circuits and Oscillators has its origins in a university course taught by the authors. As a result, it is thoroughly classroom-tested and carefully structured to facilitate learning. Readers are given a solid foundation in the basics that allows them to proceed to more advanced and sophisticated themes such as computer-aided noise simulation of high-frequency circuits.
Following a discussion of mathematical and system-oriented fundamentals, the book covers:
* Noise of linear one- and two-ports
* Measurement of noise parameters
* Noise of diodes and transistors
* Parametric circuits
* Noise in nonlinear circuits
* Noise in oscillators
* Quantization noise
Each chapter contains a set of numerical and analytical problems that enable readers to apply their newfound knowledge to real-world problems. Solutions are provided in the appendices.
With their many years of classroom experience, the authors have designed a book that is ideal for graduate students in engineering and physics. It also addresses key issues and points to solutions for engineers working in the burgeoning satellite and wireless communications industries.

Broadcast spectrum is scarce, both in terms of our ability to access existing spectrum and as a result of access rules created by governments. An emerging paradigm called cognitive radio, however, has the potential to allow different systems to dynamically access and opportunistically exploit the same frequency band in an efficient way, thereby allowing broadcasters to use spectrum more efficiently. Cognitive Radio and Interference Management: Technology and Strategy brings together state-of-the-art research results on cognitive radio and interference management from both theoretical and practical perspectives. It serves as a bridge between people who are working to develop theoretical and practical research in cognitive radio and interference management, and therefore facilitate the future development of cognitive radio and its applications.

In the ever-changing field of mobile communications, keeping abreast of the newest technological advances is a must. This updated edition of the 1994 classic offers engineers, research specialists, and students a comprehensive understanding of the relationship between the elements involved in antenna system design. It gives professionals sound advice on antenna selection, access to the latest propagation modeling formulas, and guidance on the latest RF safety standards and measurement techniques.

Beside technological issues, this book discusses the administrative and industrial aspects of third generation mobile communications. The authors emphasize existing problems and propose solutions. They provide the most comprehensive and topical information on 3G mobile communications currently available.

As the first wave of third-generation communication devices arrives, technological and societal effects will be widespread. The ability to communicate via hand-held devices voice, data, and video raises many challenges and questions. Beside detailed looks at technological issues, from the system protocol to implementation technologies, this book discusses the administrative and industrial aspects of third-generation mobile communications. The authors emphasize existing problems and propose solutions. They seek to provide the most comprehensive and topical information on 3G mobile communications currently available. Chapters offer an overview of wireless technology and terminology, protocols for mobility management, the safety of radio-frequency energy, WLAN (wireless local area networks), multiple access schemes, and microwave photonics. It is intended as an introduction and reference for engineers entering the field of wireless communications.

A smart choice for wireless communications engineers and sales & marketing executives, this newly revised edition of an Artech House bestseller provides professionals with an up-to-date introduction to third generation (3G) mobile communication system principles, concepts, and applications. The second edition includes an even more thorough treatment of potential 3G applications and descriptions of new, emerging technologies.

Knowledge of the concepts, architecture, protocols and performance of UMTS is essential for all those working in the field of mobile communications. UMTS - The Fundamentals provides a clear understanding of the major concepts and their impacts on the rollout, operation, usability and capabilities of this innovative third generation system. All of the major radio, protocols and networking related functions of UMTS are presented and in addition, the service architecture, standards and the path towards next generation systems are described.

• Provides an instructive approach allowing individuals unfamiliar with mobile radio systems to follow and understand UMTS.

• Covers and clearly describes the entire field of 3G systems ranging from digital radio transmission, cellular basics, standardization, UMTS system architecture and protocols, service architecture, and an introduction to beyond 3G systems.

• Features numerous problems and solutions to explain UMTS related subjects.

Wireless and Mobile Data Networks provides a single point of knowledge about wireless data technologies, including:
* Comprehensive easy-to understand resource on wireless data technologies
* Includes wireless media, data transmission via cellular networks, and network security
* Provides a single point of knowledge about wireless data
* Focuses on wireless data networks, wireless channels, wireless local networks, wide area cellular networks and wireless network security
An Instructor Support FTP site is available from the Wiley editorial department.

Cognitive radio is 5-G technology, comes under IEEE 802.22 WRAN (Wireless Regional Area Network) standards. It is currently experiencing rapid growth due to its potential to solve many of the problems affecting present-day wireless systems. The foremost objective of "Introduction to Cognitive Radio Networks and Applications" is to educate wireless communication generalists about cognitive radio communication networks. Written by international leading experts in the field, this book caters to the needs of researchers in the field who require a basis in the principles and the challenges of cognitive radio networks.

Orthogonal frequency-division multiplexing (OFDM) is a method of digital modulation in which a signal is split into several narrowband channels at different frequencies.

CDMA is a form of multiplexing, which allows numerous signals to occupy a single transmission channel, optimising the use of available bandwidth. Multiplexing is sending multiple signals or streams of information on a carrier at the same time in the form of a single, complex signal and then recovering the separate signals at the receiving end.

Multi-Carrier (MC) CDMA is a combined technique of Direct Sequence (DS) CDMA (Code Division Multiple Access) and OFDM techniques. It applies spreading sequences in the frequency domain.

Wireless communications has witnessed a tremendous growth during the past decade and further spectacular enabling technology advances are expected in an effort to render ubiquitous wireless connectivity a reality.

This technical in-depth book is unique in its detailed exposure of OFDM, MIMO-OFDM and MC-CDMA. A further attraction of the joint treatment of these topics is that it allows the reader to view their design trade-offs in a comparative context.

Divided into three main parts:

Part I provides a detailed exposure of OFDM designed for employment in various applications

Part II is another design alternative applicable in the context of OFDM systems where the channel quality fluctuations observed are averaged out with the aid of frequency-domain spreading codes, which leads to the concept of MC-CDMA

Part III discusses how to employ multiple antennas at the base station for the sake of supporting multiple users in the uplinkPortrays the entire body of knowledge currently available on OFDMProvides the first complete treatment of OFDM, MIMO(Multiple Input Multiple Output)-OFDM and MC-CDMAConsiders the benefits of channel coding and space time coding in the context of various application examples and features numerous complete system design examplesConverts the lessons of Shannon's information theory into design principles applicable to practical wireless systemsCombines the benefits of a textbook with a research monograph where the depth of discussions progressively increase throughout the book

This all-encompassing self-contained treatment will appeal to researchers, postgraduate students and academics, practising research and development engineers working for wireless communications and computer networking companies and senior undergraduate students and technical managers.

In the tradition of the previous three conferences, the proceedings of the 4th Ultra-Wideband Short-Pulse Electromagnetics Conference explores topics including pulse generation and detection; broadband electronic systems; antennas - theory, design, experiments and systems; pulse propagation; scattering theory; signal processing; and buried targets - detection and identification.

Written by the developers of the new 21st century HF (high frequency) radio technology, this groundbreaking resource presents the powerful new capabilities and technical details of 3G and WBHF (wideband high frequency) waveforms to help professionals understand and use the ionospheric channel for video and high-speed data transmission. Featuring more than 180 illustrations, this practical book enables engineers to utilize this technology to communicate voice and data over the horizon without needing anyone else's infrastructure, send video beyond line of sight from moving platforms, and communicate over long ranges at such low power that it is nearly undetectable. Readers learn the rationale behind the new US and NATO standards for HF radio communications directly from their developers. Additionally, the book looks at the future direction of this technology area and the open problems requiring further research.

By focusing on multiple access for mobile communication systems, with a specific interest in access arbitration through multiple access protocols at the MAC (Medium Access Control) layer, the authors explain how packet-voice and packet-data traffic can be supported efficiently in mobile communication systems. This is approached from a theoretical point of view and from the context of existing systems such as GPRS and UMTS. The evolution of mobile communications from 1G to 3.5G and possible 4G scenarios are discussed.

• Examines the suitable MAC strategies for the support of packet-data on shared and common channels

• Describes the physical and logical channels in GSM, HSCSD and GPRS and examines the GPRS air interface features, including EGPRS and Release 4/5 enhancements

• Documents the authors extensive research efforts on PRMA-based protocols for CDMA, hybrid CDMA/TDMA and TDMA air interfaces

• Analyses the various options for packet-data support in UMTS Release 1999 on common and dedicated channels and planned enhancements in Release 5

• Summarises the challenges faced when wanting to support IP-based real-time and multimedia traffic efficiently in mobile communication systems and reviews how further evolutions of GPRS and UMTS attempt to meet these challenges

• Presents interesting research results on the benefits of channel access control in the context of reservation protocols

This comprehensive overview brings the reader up-to-date on new technologies for low-speed data, speech and broadband communications, competing standards, adjacent technologies, new generation networks and future developments. It covers all EU countries, Norway, Switzerland, the USA and Japan. The text includes up-to-date discussions on standards such as TETRA/Tetrapol, POGSAC/ERMES/FLEX and W-CDMA, several adjacent technologies such as VSAT, (d-)GSP and DAB broadcasting, and US and Japanese standards such as IS-95, CDMA, D-AMPS, FLEX/ReFlex and PDC.

This new edition of a highly successful book is completely updated and revised to reflect the latest developments involving the transmission of digital information over wireless networks. Written by an industry expert with over 32 years in the field, the Wireless Data Handbook offers a broad, unbiased treatment-unencumbered by various corporate interests-covering both the technical and business aspects of wireless technologies.

This book explains the application of recent advances in computational intelligence - algorithms, design methodologies, and synthesis techniques - to the design of integrated circuits and systems. It highlights new biasing and sizing approaches and optimization techniques and their application to the design of high-performance digital, VLSI, radio-frequency, and mixed-signal circuits and systems. This first of two related volumes addresses the design of analog and mixed-signal (AMS) and radio-frequency (RF) circuits, with 17 chapters grouped into parts on analog and mixed-signal applications, and radio-frequency design. It will be of interest to practitioners and researchers in computer science and electronics engineering engaged with the design of electronic circuits.

th The papers appearing in this book were originally presented at the 9 Virginia Tech/MPRG Symposium on Wireless Personal Communications. The Symposium on Wireless Communications, which is an annual event for Virginia Tech, was held on June 2-4, 1999. The 1999 symposium was co-sponsored by MPRG, the Division of Continuing Education, University International Programs, and the MPRG Industrial Affiliate Sponsors. Much of the success of our annual symposium, as well as the success of MPRG's research program, is due to the support of our industrial affiliates. Their support allows us to serve the wireless community through research, education and outreach programs. At the time of the 1999 symposium, the MPRG affiliates program included the following organizations: Army Research Office, AT&T Corporation, Bellsouth Cellular Corporation, Comcast Cellular Communications, Inc. , Datum, Inc. , Ericsson, Inc. , Grayson Wireless, Hewlett-Packard Company, Honeywell, Inc. , Hughes Electronics Corporation, ITT Industries, Lucent Technologies, Motorola, National Semiconductor, Nokia, Nortel Networks, Qualcomm, Inc. , Radix Technologies, Inc. , Salient 3 Communications, Samsung Advanced Institute of Technology, Southwestern Bell, Tantivy Communications, Tektronix, Inc. , Telcordia Technologies, Texas Instruments, TRW, Inc. , and the Watkins-Johnson Company As can be seen from the Table of Contents, the papers included in this book are divided into six sections. The first five of these correspond to symposium sessions, and cover the following topics: Propagation and Channel Modeling (4 papers), Antennas (6 papers), Multiuser Detection (3 papers), Radio Systems and Technology (4 papers), and Wireless Data (3 papers).