This book fills an information gap on cognitive radios, since the discussion focuses on the implementation issues that are unique to cognitive radios and how to solve them at both the architecture and circuit levels. This is the first book to describe in detail cognitive radio systems, as well as the circuit implementation and architectures required to implement such systems. Throughout the book, requirements and constraints imposed by cognitive radio systems are emphasized when discussing the circuit implementation details. This is a valuable reference for anybody with background in analog and radio frequency (RF) integrated circuit design, needing to learn more about integrated circuits requirements and implementation for cognitive radio systems.

This book describes the state-of-the-art in RF, analog, and mixed-signal circuit design for Software Defined Radio (SDR). It synthesizes for analog/RF circuit designers the most important general design approaches to take advantage of the most recent CMOS technology, which can integrate millions of transistors, as well as several real examples from the most recent research results.

Thisbook contains revised contributions byt he speakers oft he 1s t IEEE Workshop on Wireless Communication Circuits andSystems, held in Lucerne, Switzerland, from June 22-24, 1998. The aim oft he workshop was to apply the vast expertise oft he CAS Society in the area of circuit and systemdesign to therapidly growing field of wireless communications. Theworkshop combined presentations by invited experts from academia and industry with panel and informal discussions. The following topics were covered: RFSystemInteg ration (single chip systems, CM OS RF circuits), RFFront End Circuits (CMOS RF oscillators, broadband design techniques), Wideband Conversion for Software Radio (A/D conversion issues, wideband sub sampling, low spurious A/D conversion), Process Technologies for Future RF Systems (Si, SiGe, GaAs, CMOS, packaging technologies), DSPforWireless Communications (DSP algorithms, fixed point systems, DSP for baseband applications), Blind Channel Equalization (adaptive interference suppression, design techniques, channel estimation). The workshop was a great success, with over 130 participants from 19 countries, from the U. S. to Europe and Asia, including a large contingent of participants from industry (60% ). Feedback from the participants showed that the carefully selected combination oftutorial like lectures with lectures onspecialized and advancedtopics was a feature oft he workshop that was particularly a ppreciated. Duet o therelatively strong involvemento findustry - both in theform of lecturers and listeners - a high level ofd i scussion was attained in bothpanel sessions and informal gatherings.

The 'Scanners' series of books have been consistent bestsellers, being the UK's leading guides to receiving equipment employed by enthusiasts to monitor the short wave and VHF/UHF wavebands used by airfields, maritime and rescue services, and analogue and digital two-way private mobile radio systems. This new (seventh) edition covers the rapidly increasing trend towards digital two-way radio communications and the latest handheld and mobile/base scanners with some digital modes fitted. It has been fully re-written and updated to include the latest UK radio frequency listings and call signs for airports, maritime and emergency services and other professional organisations. The book covers the latest shifts in the hobby towards digital and PC- and tablet-controlled radio technology and illustrates the very latest commercial radio scanning equipment and accessories. Included are details of an increasing number of 'apps' for smartphones specifically for radio data decoding, including programs for digital scanner communications decoding for which a smartphone can be linked to an existing scanner radio to decode. Other innovations include TETRA as used by police, ambulance, fire and rescue services, and DMR modes such as Mototrbo. It is predicted that by 2016, fifty per cent of two-way radio communication in the UK will use digital modes.

RF Power Amplifiers for Mobile Communications fits in the quest for fully integrated CMOS transceivers. The book tackles both high efficiency and high linearity PA design in low-voltage CMOS, and has a strong emphasis on theory, design and implementation. The book is conceived as a design guide for those actively involved in the design of CMOS wireless transceivers. RF Power Amplifiers for Mobile Communications starts from the basic theory of power amplification from the viewpoint of CMOS integration. The design of switching RF power amplifiers in CMOS is explored and CMOS PA design at low supply voltage using parallel amplification is discussed. Combining both efficiency and linearity is one of the major issues in CMOS PA design for wireless and mobile communications and is subsequently tackled. Different linearization techniques and approaches are discussed and polar modulation is clarified in greater detail.

Due to the explosive global growth in the number of mobile subscribers, as well as the growth predicted in the mobile data segment, the need for improved spectrum efficiency on the radio interface becomes more and more important. Frequency hopping (FH) is an effective method for improving the spectrum efficiency. One of the advantages of FH is that it can be combined with other spectral efficiency improving features like power control, handover and reuse partitioning. Performance Enhancements in a Frequency Hopping GSM Network covers FH and some of the additional features in detail. It begins with an in-depth description of the basic concept of FH on link level as well as on system level. Different methods have been used for analysis, such as link level simulations, network level simulations and classic tele-traffic theory. Special features of Performance Enhancements in a Frequency Hopping GSM Network Combines the practical experiences of operator and vendor with more theoretical research methods. An in-depth treatment of prevailing problems in GSM networks; Presentation of a new method, computer-aided network design (CAND), which has been developed to analyse the complex network structures of a GSM network. CAND provides the possibility for more realistic performance evaluations than conventional methods; Provides GSM-specific analysis of functionality improvements in power control, discontinuous transmission, and several handover algorithms; Explanation of the quality and capacity gains of features like the combination of FH and reuse partitioning, referred to as intelligent frequency hopping; A frequency planning method for FH GSM networks is presented. This method exploits the benefits from FH directly in the allocation process, increasing the overall frequency plan.

Presenting a description of automated HF communications, this work also considers the many phenomena which affect HF radio, and offers insight into new and future HF techniques. It includes information on automatic link establishment (ALE) technology, advanced variable-transmission rate modems, wideband (1 MHz) HF communications services, and automated HF networks as an extension of the Internet.

An explanation of behavioural modelling of nonlinear RF and microwave devices, and a presentation of a powerful curve fitting technique that can be used to describe the behaviour and range of microwave components as a function of multiple independent variables. It features easily-understood mathematical formulae. Using the author's behavioural modelling methodology, you should be able to generate equations that provide accurate and acceptable reproductions of nonlinear RF and microwave device performance under various conditions. Specifically, you should be able to obtain more accurate representations of saturation and cut-off behaviour; develop more accurate transistor models to generate improved harmonic power output data as a function of power input ranging from small signal to heavy compression, and bias levels ranging from pinch off to maximum allowable current; gain a unified approach to amplifier and transistor characterization of compression characteristic, 1 dB compression point, saturated power output and 3rd order intercept point; and create trade spaces for optimization of sub-system design. The book covers how behavioural modelling is used for bipolar and MESFET device. The accompanying software contains formulae from the text. System requirements: PC-compatible Windows 95/98 with Excel 7.0 or higher; a 486 processor or higher; 16 MB RAM and 1.5 MB hard disk space.

This is the first book focusing on the subject of image rejection in wireless receiver design, which is crucial for the current and next generation mobile terminals. It serves as a very useful reference for wireless design engineers, researchers and students.

This broadly applicable book introduces radio system planning, emphasizing theoretical and practical details for the planning of GSM, GPRS and UMTS mobile networks. It explains the key planning parameters for these systems and describes the common tasks in radio system planning.

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.

The latest text in the Wiley Series in Microwave and Optical Engineering

The first comprehensive resource on planar antenna designs

Planar antennas are the newest generation of antennas, boasting such attractive features as low profile, light weight, low cost, and ease of integration into arrays. These features make them ideal components of modern communications systems, particularly in cellular and WLAN applications. Consequently, many novel designs of planar antennas for related applications have come into being within the last two to three years. Until now these designs were only accessible to current and prospective antenna designers through journal articles, conference papers, and patent descriptions.

Planar Antennas for Wireless Communications organizes today’s most important planar antenna designs into one easy-to-use reference. In this, the latest addition to the Wiley Series in Microwave and Optical Engineering, the author presents more than seventy advanced planar antenna designs, along with detailed design considerations and experimental results, including:

• PIFAs for internal mobile phone antennas
• Very-low-profile monopoles for internal mobile phone antennas
• Base-station antennas for cellular systems
• Planar antennas for WLAN applications
• DR antennas for wireless communications
• Integration of antennas for different operating bands

Each chapter features a multitude of illustrations for the geometries and experimental results of the featured designs, as well as a complete list of related references for further study, making the book an invaluable design resource for antenna scientists and engineers alike.

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.

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.

The wireless mobile Internet is not just an extension of the Internet into the mobile environment - giving users access to Internet services while they are on the move. It is about integrating the Internet and other telecommunications technologies into a single system that delivers all the communications services that human beings require.

The Wireless Mobile Internet - Architectures, Protocols, and Services is the first complete reference on the wireless Internet. It elegantly bridges the literary gap that exists between cellular wireless and computer communications. The author summarises the relevant standards activities (including the current status of wireless IP), provides updates on state-of-the-art technologies and protocols, describes various network models in detail and suggests specific techniques for implementing services.

Key features include:

• A comprehensive description of the core network and access technologies of 2G and 3G cellular systems, as well as related standards.

• A complete overview of all existing wireless Internet initiatives such as HSCSD, CDPD, WAP and i-mode.

• A thorough treatment of all the essential technical requirements of a mobile network: QoS, traffic modelling and management, mobility management, transport protocols and network protocols.

• Coverage of cutting-edge technologies such as cellular, wLAN, and satellite through to wireless IP.

• More than 250 diagrams illustrating key concepts.

• A forward look at the crucial features of future mobile network architectures.

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."

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.