Wireless Personal Communications: Improving Capacity, Services and Reliability presents a broad range of topics in wireless communications, including perspectives from both industry and academia. The book serves as a reflection of current research thrusts in wireless communications, an area which continues to grow at a rapid rate as the industry strives to provide a wider range of services with greater reliability and at lower cost. Wireless Personal Communications: Improving Capacity, Services and Reliability is organized into four sections. Section I focuses on propagation and smart antennas with emphasis on measurements, modeling and simulation. Section 2 is devoted to the important subject of Code Division Multiple Access (CDMA) systems with coverage of bit error rate calculations, interference cancellation, frequency estimators and acquisition schemes. Section 3 covers networking and multiple-access issues such as mobility tracking, Markov analysis of random access protocols, and the design and development of a prototype system to access Low Earth Orbiting (LEO) satellites. Section 4 presents software radio technologies, including wideband software-definable base station technology, space-borne processing technology for mobile communications systems, filter design, universal cordless telephone transceivers using DSP, a method for predicting nonlinearities for an RF power amplifier, MAP symbol detection of CPM bursts, and unification of MLSE receivers. Wireless Personal Communications: Improving Capacity, Services and Reliability serves as an excellent reference source and may be used as a text for advanced courses on the subject.

Green Software De?ned Radios, the title of this book may have originated from a lackofinspiration, andthecombinationofhardwork, jetlag, anddrinkinggreentea. The message we want to convey however, is that SDRs are a promising technology for the future, providing they are designed for ef?cient usage of scarce resources: energy and spectrum. In the last years, the R&D teams focusing on wireless c- munication (around the world and at IMEC speci?cally), have realized great bre- throughs. It is our honor, building on this knowledge, to bring a comprehensive overview of the essential technologies. We are grateful that Springer is willing to publish in their collection on radio technologies, a book on green SDRs, a weird species still today, yet maybe the baseline for the day after tomorrow. Dear reader, we wish that you ?nd in the following pages, including the references, some int- esting insights, and that this book may live more or less up to your expectations (and hopefully more than less). Thisbook'sclosingstatesthatthequestforGreenSDRshasnotended, thisisjust the beginning. Concerning this book however, we are happy that today the opposite is true. We want to acknowledge our colleagues at IMEC for their great scienti?c contribution, and even more for the enjoyable cooperation.

th The paperspresented in this book wereoriginally presented att he 10 Virginia Tech/MPRG Symposium on Wireless Personal Communications, whichw as held ont heVirginia Tech campus June 14 16,2000. Thisyear's Symposium was sponsored byVirginia Tech's M obile and Portable Radio Research Group (MPRG), the Virginia Tech D ivision ofC ontin uing Education, andthe MPRG Industrial Affiliates Program. TheIE EE Virginia Mountain Section and the Virginia Tech Joint Student Chapter ofthe IEEE Communications andVehicular Technology Societies provided technical co sponsorship. Much oft he success ofo ur annual symposium,a s well as the success of MPRG's research and educationprogram, are directlydue to the support of our industrial affiliates. The support that is provided byt he industrial affiliates program allows MPRG to serve thew irelesscommunity through research, education, andoutreach activities. MP RG's industria l affiliates include the following organizations: AnalogD evices, Inc. , AnarenMicrowave, Inc. , theA rmyResearch Office, AT&T Corporation, BAE Systems, BellSouth Cel lular Corporation, Comcast Cellular Communications, Inc. , Da tum, Inc. , Ericsson, Inc. , Grayson Wireless, Hughes Electronics Corporation, ITTIndustries, LGIC, Inc. , Lucent Technologies, Inc. , Motorola, Inc. , Nokia, Inc. , Nortel Networks, Qualcomm, Inc. , Raytheon Systems Company, Samsung Advanced Institute of Technology, Southwestern Bell, Tantivy Communications, Inc. , Tektronix, Inc. , Telcordia Technologies, Texas Instruments, andWavtrace, Inc. In 1999,t he Wireless Symposiumwas expanded to include atutorial course. This activity proved populara nd was continued in 2000.

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.

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.

The past several years have been exciting for wireless communications. The public appetite for new services and equipment continues to grow. The Second Generation systems that have absorbed our attention during recent years will soon be commercial realities. In addition to these standard systems, we see an explosion of technical alternatives for meeting the demand for wireless communications. The debates about competing solutions to the same problem are a sign of the scientific and technical immaturity of our field. Here we have an application in search of technology rather than the reverse. This is a rare event in the information business. Happily, there is a growing awareness that we can act now to prevent the technology shortage from becoming more acute at the end of this decade. By then, market size and user expectations will surpass the capabilities of today's emerging systems. Third Generation Wireless Information Networks will place even greater burdens on technology than their ancestors. To discuss these issues, Rutgers University WINLAB plays host to a series of Workshops on Third Generation Wireless Information Networks. The first one, in 1989, had the flavor of a gathering of committed enthusiasts of an interesting niche of telephony. Presentations and discussions centered on the problems of existing cellular systems and technical alternatives to alleviating them. Although the more distant future was the announced theme of the Workshop, it drew only a fraction of our attention.

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."

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 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.

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.

During the first fifty years of the twentieth century, ham radio went from being an experiment to virtually an art form. Because of the few government restrictions and the low monetary investment required, the concept of ham radio appealed to various people. More than just a simple hobby, however, ham radio required its operators to understand radio theory, be able to trace a schematic and know how to build a transmitter and receiver with whatever material they might have available. With the advent of World War II and the increased need for cutting-edge communications, the United States government drew upon the considerable knowledge and skill of these amateur ham radio operators, validating the fact that ham radio was here to stay. This book explores the history of ham radio operators, emphasizing their social history and their many contributions to the technological development of worldwide communications. It traces the concept of relays, including the American Radio Relay League, from contacts as close as 25 miles apart to operators anywhere in the world. The book highlights the part played by ham radio in many of the headlined events of the half century, especially exploration and aviation ""firsts"". The ways in which these primarily amateur operators assisted in times of disaster including such events as the sinking of the Titanic and the 1937 Ohio River flood, are also examined.

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.

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.

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.

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.

This is a book about real-world design techniques for analog circuits: amplifiers, filters, injection-locked oscillators, phase-locked loops, transimpedance amplifiers, group delay correction circuits, notch filters, and spectrum regrowth in digital radio frequency (RF) transmitters, etc. The book offers practical solutions to analog and RF problems, helping the reader to achieve high-performance circuit and system design. A variety of issues are covered, such as: How to flatten group delay of filters How to use reciprocity to advantage How to neutralize a parasitic capacitance How to deepen a notch by adding only two components to the network How to demodulate a signal using the secant waveform and its benefit How to flatten the frequency response of a diode detector When to use a transimpedance amplifier and how to maximize its performance How to recover non-return-to-zero (NRZ) data when alternating current (AC) coupling is required Why phase noise corrupts adjacent communication channels Simple method to prevent false locking in phase-locked loops How to improve the bandwidth of amplification by using current conveyors A very simple impedance matching technique requiring only one reactive component How to use optimization Quadrature distortion and cross-rail interference This book is meant to be a handbook (or a supplemental textbook) for students and practitioners in the design of analog and RF circuitry with primary emphasis on practical albeit sometimes unorthodox circuit realizations. Equations and behavioral simulations result in an abundance of illustrations, following a "words and pictures" easy-to-understand approach. Teachers will find the book an important supplement to a standard analog and RF course, or it may stand alone as a textbook. Working engineers may find it useful as a handbook by bookmarking some of the step-by-step procedures, e.g., the section on simplified impedance matching or group delay flattening.

This book addresses the widened scope of technology that has become available to the audio designer over the last 35 years. Including expanded prefaces to each article, the author provides background information and circuit commentary. Douglas Self has spent many years working at the top level of design in the professional audio and hifi industries and has taken out a number of patents in the field of audio technology.

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.