Low-power Blocks for UWB Transceivers
Low-power Blocks for UWB Transceivers

Author: Joshua H. Kim

Publisher:

Published: 2015

Total Pages: 88

ISBN-13: 9781321646184

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In this dissertation, low-power blocks in UWB transceiver systems are presented. In particular, the main focus of this study is how low-power blocks in an impulse radio UWB (IR-UWB) system can be employed in sensor networks such as Body Area Networks (BANs). The thesis is divided into three general parts. In the first part, the general history, definitions, regulations, and development of UWB systems are reviewed. In addition, a brief explanation of the fundamental concepts of radio frequency communication in short duration of pulses is given. In the second part, the startup behavior of LC-VCOs used in UWB transmitters is investigated. In order to decrease the power consumption of the circuits without adding any complexity, we deliberately introduce a small asymmetry into the VCO that can greatly reduce the oscillation start-up time. Finally, we study the super-regenerative receiver architecture and the challenges it presents. In this work, we have designed a low-power 4 Mb/s super-regenerative receiver in a 0.18 ℗æm CMOS process that tracks the incoming signal carrier pulse and synchronizes it with a pulse quench signal. The energy consumption for this receiver is 0.17 nJ/bit, which demonstrates the lowest energy consumption reported so far for an IR-UWB receiver system.

Ultra-Low Power FM-UWB Transceivers for IoT
Ultra-Low Power FM-UWB Transceivers for IoT

Author: Vladimir Kopta

Publisher: CRC Press

Published: 2022-09-01

Total Pages: 224

ISBN-13: 1000794490

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Over the past two decades we have witnessed the increasing popularity of the internet of things. The vision of billions of connected objects, able to interact with their environment, is the key driver directing the development of future communication devices. Today, power consumption as well as the cost and size of radios remain some of the key obstacles towards fulfilling this vision. Ultra-Low Power FM-UWB Transceivers for IoT presents the latest developments in the field of low power wireless communication. It promotes the FM-UWB modulation scheme as a candidate for short range communication in different IoT scenarios. The FM-UWB has the potential to provide exactly what is missing today. This spread spectrum technique enables significant reduction in transceiver complexity, making it smaller, cheaper and more energy efficient than most alternative options. The book provides an overview of both circuit-level and architectural techniques used in low power radio design, with a comprehensive study of state-of-the-art examples. It summarizes key theoretical aspects of FM-UWB with a glimpse at potential future research directions. Finally, it gives an insight into a full FM-UWB transceiver design, from system level specifications down to transistor level design, demonstrating the modern power reduction circuit techniques. Ultra-Low Power FM-UWB Transceivers for IoT is a perfect text and reference for engineers working in RF IC design and wireless communication, as well as academic staff and graduate students engaged in low power communication systems research.

Low Power UWB CMOS Radar Sensors
Low Power UWB CMOS Radar Sensors

Author: Hervé Paulino

Publisher: Springer Science & Business Media

Published: 2008-05-02

Total Pages: 239

ISBN-13: 1402084099

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Low Power UWB CMOS Radar Sensors deals with the problem of designing low cost CMOS radar sensors. The radar sensor uses UWB signals in order to obtain a reasonable target separation capability, while maintaining a maximum signal frequency below 2 GHz. This maximum frequency value is well within the reach of current CMOS technologies. The use of UWB signals means that most of the methodologies used in the design of circuits and systems that process narrow band signals, can no longer be applied. Low Power UWB CMOS Radar Sensors provides an analysis between the interaction of UWB signals, the antennas and the processing circuits. This analysis leads to some interesting conclusions on the types of antennas and types of circuits that should be used. A methodology to compare the noise performance of UWB processing circuits is also derived. This methodology is used to analyze and design the constituting circuits of the radar transceiver. In order to validate the design methodology a CMOS prototype is designed and experimentally evaluated.

Design of Ultra-Low Power Impulse Radios
Design of Ultra-Low Power Impulse Radios

Author: Alyssa Apsel

Publisher: Springer Science & Business Media

Published: 2013-10-29

Total Pages: 159

ISBN-13: 1461418453

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This book covers the fundamental principles behind the design of ultra-low power radios and how they can form networks to facilitate a variety of applications within healthcare and environmental monitoring, since they may operate for years off a small battery or even harvest energy from the environment. These radios are distinct from conventional radios in that they must operate with very constrained resources and low overhead. This book provides a thorough discussion of the challenges associated with designing radios with such constrained resources, as well as fundamental design concepts and practical approaches to implementing working designs. Coverage includes integrated circuit design, timing and control considerations, fundamental theory behind low power and time domain operation, and network/communication protocol considerations.

Architectures and Synthesizers for Ultra-low Power Fast Frequency-Hopping WSN Radios
Architectures and Synthesizers for Ultra-low Power Fast Frequency-Hopping WSN Radios

Author: Emanuele Lopelli

Publisher: Springer Science & Business Media

Published: 2010-11-19

Total Pages: 241

ISBN-13: 9400701837

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Wireless sensor networks have the potential to become the third wireless revolution after wireless voice networks in the 80s and wireless data networks in the late 90s. Unfortunately, radio power consumption is still a major bottleneck to the wide adoption of this technology. Different directions have been explored to minimize the radio consumption, but the major drawback of the proposed solutions is a reduced wireless link robustness. The primary goal of Architectures and Synthesizers for Ultra-low Power Fast Frequency-Hopping WSN Radios is to discuss, in detail, existing and new architectural and circuit level solutions for ultra-low power, robust, uni-directional and bi-directional radio links. Architectures and Synthesizers for Ultra-low Power Fast Frequency-Hopping WSN Radios guides the reader through the many system, circuit and technology trade-offs he will be facing in the design of communication systems for wireless sensor networks. Finally, this book, through different examples realized in both advanced CMOS and bipolar technologies opens a new path in the radio design, showing how radio link robustness can be guaranteed by techniques that were previously exclusively used in radio systems for middle or high end applications like Bluetooth and military communications while still minimizing the overall system power consumption.

FM-UWB Transceivers for Autonomous Wireless Systems
FM-UWB Transceivers for Autonomous Wireless Systems

Author: Nitz Saputra

Publisher: CRC Press

Published: 2022-09-01

Total Pages: 199

ISBN-13: 100079931X

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Significant research effort has been devoted to the study and realization of autonomous wireless systems for wireless sensor and personal-area networking, the internet of things, and machine-to-machine communications. Low-power RF integrated circuits, an energy harvester and a power management circuit are fundamental elements of these systems. An FM-UWB Transceiver for Autonomous Wireless Systems presents state-of-the-art developments in low-power FM-UWB transceiver realizations. The design, performance and implementation of prototype transceivers in CMOS technology are presented. A working hardware realization of an autonomous node that includes a prototype power management circuit is also proposed and detailed in this book.Technical topics include: Low-complexity FM-UWB modulation schemesLow-power FM-UWB transceiver prototypes in CMOS technologyCMOS on-chip digital calibration techniquesSolar power harvester and power management in CMOS for low-power RF circuitsAn FM-UWB Transceiver for Autonomous Wireless Systems is an ideal text and reference for engineers working in wireless communication industries, as well as academic staff and graduate students engaged in electrical engineering and communication systems research.

Silicon-Based RF Front-Ends for Ultra Wideband Radios
Silicon-Based RF Front-Ends for Ultra Wideband Radios

Author: Aminghasem Safarian

Publisher: Springer Science & Business Media

Published: 2007-12-28

Total Pages: 97

ISBN-13: 1402067224

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A comprehensive study of silicon-based distributed architectures in wideband circuits are presented in this book. Novel circuit architectures for ultra-wideband (UWB) wireless technologies are described. The book begins with an introduction of several transceiver architectures for UWB. The discussion then focuses on RF front-end of the UWB radio. Therefore, the book will be of interest to RF circuit designers and students.

Ultra Low Power Transceiver for Wireless Body Area Networks
Ultra Low Power Transceiver for Wireless Body Area Networks

Author: Jens Masuch

Publisher: Springer Science & Business Media

Published: 2013-03-28

Total Pages: 126

ISBN-13: 3319000985

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Wireless Body Area Networks (WBANs) are expected to promote new applications for the ambulatory health monitoring of chronic patients and elderly population, aiming to improve their quality of life and independence. These networks are composed by wireless sensor nodes (WSNs) used for measuring physiological variables (e.g., glucose level in blood or body temperature) or controlling therapeutic devices (e.g., implanted insulin pumps). These nodes should exhibit a high degree of energy autonomy in order to extend their battery lifetime or even make the node supply to rely on harvesting techniques. Typically, the power budget of WSNs is dominated by the wireless link and, hence, many efforts have been directed during the last years toward the implementation of power efficient transceivers. Because of the short range (typically no more than a few meters) and low data rate (typically in between 10 kb/s and 1 Mb/s), simple communication protocols can be employed. One of these protocols, specifically tailored for WBAN applications, is the Bluetooth low energy (BLE) standard. This book describes the challenges and solutions for the design of ultra-low power transceivers for WBANs applications and presents the implementation details of a BLE transceiver prototype. Coverage includes not only the main concepts and architectures for achieving low power consumption, but also the details of the circuit design and its implementation in a standard CMOS technology.

Ultra-Low-Power Short-Range Radios
Ultra-Low-Power Short-Range Radios

Author: Patrick P. Mercier

Publisher: Springer

Published: 2015-07-21

Total Pages: 399

ISBN-13: 3319147145

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This book explores the design of ultra-low-power radio-frequency integrated circuits (RFICs), with communication distances ranging from a few centimeters to a few meters. The authors describe leading-edge techniques to achieve ultra-low-power communication over short-range links. Many different applications are covered, ranging from body-area networks to transcutaneous implant communications and smart-appliance sensor networks. Various design techniques are explained to facilitate each of these applications.

Ultra Wideband
Ultra Wideband

Author: Ranjit Gharpurey

Publisher: Springer Science & Business Media

Published: 2008-03-06

Total Pages: 207

ISBN-13: 0387692789

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This book is a compilation of chapters on various aspects of Ultra Wideband. The book includes chapters on Ultra Wideband transceiver implementations, pulse-based systems and one on the implementation for the WiMedia/MBOFDM approach. Another chapter discusses the implementation of the physical layer baseband, including the ADC and post-ADC processing required in the UWB system. Future advances such as multiantenna UWB solutions are also discussed.