Adaptive Rf Front Ends For Hand Held Applications

Author : Andre van Bezooijen
Publisher : Springer Science & Business Media
ISBN 13 : 9048199352
Total Pages : 169 pages
Book Rating : 4.58/5 ( download)

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Download or read book Adaptive RF Front-Ends for Hand-held Applications written by Andre van Bezooijen and published by Springer Science & Business Media. This book was released on 2010-10-28 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: The RF front-end – antenna combination is a vital part of a mobile phone because its performance is very relevant to the link quality between hand-set and cellular network base-stations. The RF front-end performance suffers from changes in operating environment, like hand-effects, that are often unpredictable. Adaptive RF Front-Ends for Hand-Held Applications presents an analysis on the impact of fluctuating environmental parameters. In order to overcome undesired behavior two different adaptive control methods are treated that make RF frond-ends more resilient: adaptive impedance control, and adaptive power control. Several adaptive impedance control techniques are discussed, using a priori knowledge on matching network properties, in order to simplify robust 2-dimensional control. A generic protection concept is presented, based on adaptive power control, which improves the ruggedness of a power amplifier or preserves its linearity under extremes. It comprises over-voltage, over-temperature, and under-voltage protection.

Author : Vojkan Vidojkovic
Publisher : Springer Science & Business Media
ISBN 13 : 1402065345
Total Pages : 204 pages
Book Rating : 4.47/5 ( download)

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Download or read book Adaptive Multi-Standard RF Front-Ends written by Vojkan Vidojkovic and published by Springer Science & Business Media. This book was released on 2008-02-07 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates solutions, benefits, limitations, and costs associated with multi-standard operation of RF front-ends and their ability to adapt to variable radio environments. Next, it highlights the optimization of RF front-ends to allow maximum performance within a certain power budget, while targeting full integration. Finally, the book investigates possibilities for low-voltage, low-power circuit topologies in CMOS technology.

Author : Vojkan Vidojkovic
Publisher : Springer
ISBN 13 : 9789048115327
Total Pages : 192 pages
Book Rating : 4.29/5 ( download)

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Download or read book Adaptive Multi-Standard RF Front-Ends written by Vojkan Vidojkovic and published by Springer. This book was released on 2009-09-03 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates solutions, benefits, limitations, and costs associated with multi-standard operation of RF front-ends and their ability to adapt to variable radio environments. Next, it highlights the optimization of RF front-ends to allow maximum performance within a certain power budget, while targeting full integration. Finally, the book investigates possibilities for low-voltage, low-power circuit topologies in CMOS technology.

Author : Gernot Hueber
Publisher : John Wiley & Sons
ISBN 13 : 1118102207
Total Pages : 608 pages
Book Rating : 4.06/5 ( download)

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Download or read book Multi-Mode / Multi-Band RF Transceivers for Wireless Communications written by Gernot Hueber and published by John Wiley & Sons. This book was released on 2011-04-04 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Includes original contributions from distinguished researchers and professionals. Covers cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Contributors are all leading researchers and professionals in this field.

Author : Qizheng Gu
Publisher : Springer
ISBN 13 : 3319099248
Total Pages : 353 pages
Book Rating : 4.48/5 ( download)

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Download or read book RF Tunable Devices and Subsystems: Methods of Modeling, Analysis, and Applications written by Qizheng Gu and published by Springer. This book was released on 2014-11-05 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as a hands-on guide to RF tunable devices, circuits and subsystems. An innovative of modeling for tunable devices and networks is described, along with a new tuning algorithm, adaptive matching network control approach, and novel filter frequency automatic control loop. The author provides readers with the necessary background and methods for designing and developing tunable RF networks/circuits and tunable RF font-ends, with an emphasis on applications to cellular communications.

Author : Aleksandar Tasic
Publisher : Springer Science & Business Media
ISBN 13 : 1402052502
Total Pages : 232 pages
Book Rating : 4.07/5 ( download)

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Download or read book Adaptive Low-Power Circuits for Wireless Communications written by Aleksandar Tasic and published by Springer Science & Business Media. This book was released on 2007-03-06 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a billion – soon to be two billion - cellular telephones in circulation, the next challenge is to make cellular radio functions adaptive to their environment. This book provides a comprehensive theoretical framework for optimizing performance, discussing joint optimization of Noise Figure and Input Intercept Point in receiver systems. Also examined are original techniques to optimize voltage controlled oscillators and low-noise amplifiers, minimizing power consumption while maintaining adequate system performance.

Author : Salma Ait Fares
Publisher : BoD – Books on Demand
ISBN 13 : 9533070420
Total Pages : 418 pages
Book Rating : 4.21/5 ( download)

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Download or read book Mobile and Wireless Communications written by Salma Ait Fares and published by BoD – Books on Demand. This book was released on 2010-01-01 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobile and wireless communications applications have a clear impact on improving the humanity wellbeing. From cell phones to wireless internet to home and office devices, most of the applications are converted from wired into wireless communication. Smart and advanced wireless communication environments represent the future technology and evolutionary development step in homes, hospitals, industrial, vehicular and transportation systems. A very appealing research area in these environments has been the wireless ad hoc, sensor and mesh networks. These networks rely on ultra low powered processing nodes that sense surrounding environment temperature, pressure, humidity, motion or chemical hazards, etc. Moreover, the radio frequency (RF) transceiver nodes of such networks require the design of transmitter and receiver equipped with high performance building blocks including antennas, power and low noise amplifiers, mixers and voltage controlled oscillators. Nowadays, the researchers are facing several challenges to design such building blocks while complying with ultra low power consumption, small area and high performance constraints. CMOS technology represents an excellent candidate to facilitate the integration of the whole transceiver on a single chip. However, several challenges have to be tackled while designing and using nanoscale CMOS technologies and require innovative idea from researchers and circuits designers. While major researchers and applications have been focusing on RF wireless communication, optical wireless communication based system has started to draw some attention from researchers for a terrestrial system as well as for aerial and satellite terminals. This renewed interested in optical wireless communications is driven by several advantages such as no licensing requirements policy, no RF radiation hazards, and no need to dig up roads besides its large bandwidth and low power consumption. This second part of the book, Mobile and Wireless Communications: Key Technologies and Future Applications, covers the recent development in ad hoc and sensor networks, the implementation of state of the art of wireless transceivers building blocks and recent development on optical wireless communication systems. We hope that this book will be useful for students, researchers and practitioners in their research studies.

Author : Jeffrey L. Hilbert
Publisher : CRC Press
ISBN 13 : 1498718922
Total Pages : 330 pages
Book Rating : 4.29/5 ( download)

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Download or read book Tunable RF Components and Circuits written by Jeffrey L. Hilbert and published by CRC Press. This book was released on 2018-09-03 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Industry Perspective on Key Tunable Technologies and Applications Tunable RF Components and Circuits: Applications in Mobile Handsets provides a technical introduction to the state of the art in tunable radio frequency (RF) components, circuits, and applications and discusses the foundational work that has been done to date. Leading practitioners in the field share their expertise on tunable devices in mobile handset applications. Through these practical viewpoints, readers discover how to use tunable RF techniques and devices to develop successful product designs. A substantial portion of the book focuses on antennas and antenna tuning, reflecting the dominance of the antenna tuning application in today’s commercial market for tunable RF. The book explains how RF-microelectromechanical systems (RF-MEMS), barium strontium titinate (BST), silicon-on-insulator (SOI) field effect transistors (FETs), and high-performance complementary metal oxide semiconductors (CMOS) are used as enabling technologies for tunable functions in current and next-generation radio architectures. The book also describes power amplifier envelope tracking, an emerging and important technique for improving efficiency; presents a network operator’s perspective on the evolution of the handset front end; and explores emerging approaches to production testing of wireless devices.

Author : Alencar, Paulo
Publisher : IGI Global
ISBN 13 : 1615206566
Total Pages : 1040 pages
Book Rating : 4.68/5 ( download)

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Download or read book Handbook of Research on Mobile Software Engineering: Design, Implementation, and Emergent Applications written by Alencar, Paulo and published by IGI Global. This book was released on 2012-05-31 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: The popularity of an increasing number of mobile devices, such as PDAs, laptops, smart phones, and tablet computers, has made the mobile device the central method of communication in many societies. These devices may be used as electronic wallets, social networking tools, or may serve as a person’s main access point to the World Wide Web. The Handbook of Research on Mobile Software Engineering: Design, Implementation, and Emergent Applications highlights state-of-the-art research concerning the key issues surrounding current and future challenges associated with the software engineering of mobile systems and related emergent applications. This handbook addresses gaps in the literature within the area of software engineering and the mobile computing world.

Author : Meghanathan, Natarajan
Publisher : IGI Global
ISBN 13 : 146664222X
Total Pages : 370 pages
Book Rating : 4.25/5 ( download)

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Download or read book Cognitive Radio Technology Applications for Wireless and Mobile Ad Hoc Networks written by Meghanathan, Natarajan and published by IGI Global. This book was released on 2013-06-30 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio interference is a problem that has plagued air communication since its inception. Advances in cognitive radio science help to mitigate these concerns. Cognitive Radio Technology Applications for Wireless and Mobile Ad Hoc Networks provides an in-depth exploration of cognitive radio and its applications in mobile and/or wireless network settings. The book combines a discussion of existing literature with current and future research to create an integrated approach that is useful both as a textbook for students of computer science and as a reference book for researchers and practitioners engaged in solving the complex problems and future challenges of cognitive radio technologies.