Strategies for Time Domain Characterization of UWB Components and Systems
Strategies for Time Domain Characterization of UWB Components and Systems

Author: Elena Pancera

Publisher: KIT Scientific Publishing

Published: 2014-08-13

Total Pages: 200

ISBN-13: 3866444176

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In this work new methods and criteria for the analysis of Ultra Wideband (UWB) components and systems are introduced. This permit to have a deeper insight into the component characteristics like signal distortion, ringing and dispersion, introduced by the non-ideal behavior of the UWB components over the wide frequency band. The developed analyses are the basis for correction and optimization strategies for the features of the UWB components and systems, compensating for their non-idealities.

Ultra-wideband RF System Engineering
Ultra-wideband RF System Engineering

Author: Thomas Zwick

Publisher: Cambridge University Press

Published: 2013-10-03

Total Pages: 207

ISBN-13: 1107512042

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This comprehensive summary of the state of the art in Ultra Wideband (UWB) system engineering takes you through all aspects of UWB design, from components through the propagation channel to system engineering aspects. Mathematical tools and basics are covered, allowing for a complete characterisation and description of the UWB scenario, in both the time and the frequency domains. UWB MMICs, antennas, antenna arrays, and filters are described, as well as quality measurement parameters and design methods for specific applications. The UWB propagation channel is discussed, including a complete mathematical description together with modeling tools. A system analysis is offered, addressing both radio and radar systems, and techniques for optimization and calibration. Finally, an overview of future applications of UWB technology is presented. Ideal for scientists as well as RF system and component engineers working in short range wireless technologies.

RF Modelling and Characterization of Tyre Pressure Sensors and Vehicle Access Systems
RF Modelling and Characterization of Tyre Pressure Sensors and Vehicle Access Systems

Author: Brzeska, Malgorzata Dominika

Publisher: KIT Scientific Publishing

Published: 2015-05-12

Total Pages: 242

ISBN-13: 3731503484

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Core topics of the work are the vehicle access systems such as PAssive Start and Entry (PASE), Remote Keyless Entry (RKE) as well as Tyre Pressure Monitoring System (TPMS). Two goals are followed: the development of antennas and functionality analysis from RF (Radio Frequency) point of view and improvement of system parts. The overall objective of this work is to advance the state-of-the-art vehicular electromagnetic simulation taking into account the vehicle body and nearest surroundings.

Realization Limits of Impulse-Radio UWB Indoor Localization Systems
Realization Limits of Impulse-Radio UWB Indoor Localization Systems

Author: Zwirello, Lukasz

Publisher: KIT Scientific Publishing

Published: 2014-05-06

Total Pages: 226

ISBN-13: 3731501147

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In this work, the realization limits of an impulse-based Ultra-Wideband (UWB) localization system for indoor applications have been thoroughly investigated and verified by measurements. The analysis spans from the position calculation algorithms, through hardware realization and modeling, up to the localization experiments conducted in realistic scenarios. The main focus was put on identification and characterization of limiting factors as well as developing methods to overcome them.

Antennas and Wave Propagation
Antennas and Wave Propagation

Author: Pedro Pinho

Publisher: BoD – Books on Demand

Published: 2018-09-26

Total Pages: 214

ISBN-13: 178923624X

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Antennas and radio propagation are continuously and rapidly evolving and new challenges arise every day. As a result of these rapid changes the need for up-to-date texts that address this growing field from an interdisciplinary perspective persists. This book, organized into nine chapters, presents new antenna designs and materials that will be used in the future, due to the trend for higher frequencies, as well as a bird's eye view of some aspects related to radio propagation channel modeling. The book covers the theory but also the practical aspects of technology implementation in a way that is suitable for undergraduate and graduate-level students, as well as researchers and professional engineers.

MIMO OFDM Radar-Communication System with Mutual Interference Cancellation
MIMO OFDM Radar-Communication System with Mutual Interference Cancellation

Author: Sit, Yoke Leen

Publisher: KIT Scientific Publishing

Published: 2017-04-10

Total Pages: 262

ISBN-13: 3731505991

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This work describes the OFDM-based MIMO Radar-Communication System, intended for operation in a multiple-user network, especially the automotive sector in the vehicle-to vehicle/infrastructure network. The OFDM signals however are weak towards frequency offsets causing subcarrier misalignment and corrupts the radar estimation and the demodulation of the communication signal. A simple yet effective interference cancellation algorithm is detailed here with real time measurement verification.

Analysis and Design of Multiple Element Antennas for Urban Communication
Analysis and Design of Multiple Element Antennas for Urban Communication

Author: Juan Pontes

Publisher: KIT Scientific Publishing

Published: 2010

Total Pages: 174

ISBN-13: 386644513X

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This work focuses on the analysis and design of multiple element antennas (MEA) and their interaction with the propagation channel. In particular, attention is given to urban channels and how its information throughput, i.e. capacity, can be improved. With this in mind, this work extends an existing network model of the communication system in order to reduce computation time, investigates the communicational limits of MEA systems and proposes a synthesis method for capacity maximization.

Intelligent Reflecting Surfaces in Wireless Communication Systems
Intelligent Reflecting Surfaces in Wireless Communication Systems

Author: Li, Yueheng

Publisher: KIT Scientific Publishing

Published: 2024-02-23

Total Pages: 246

ISBN-13: 373151334X

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Accompanied with the development of the wireless communication technologies, the high data traffic is more necessary for civil and industrial applications than ever The concept of an intelligent reflective surface (IRS) has attracted considerable attention recently as a low-cost solution. As the main contribution, the dissertation creates new state-of-the-art and formulates a solid milestone for the IRS research field.

Millimeter-Wave Radio-over-Fiber Links based on Mode-Locked Laser Diodes
Millimeter-Wave Radio-over-Fiber Links based on Mode-Locked Laser Diodes

Author: Brendel, Friederike

Publisher: KIT Scientific Publishing

Published: 2014-05-14

Total Pages: 324

ISBN-13: 3866449860

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Radio communications in the range of 60 GHz enable multi-Gigabit/s network access in indoor environments. Due to the propagation characteristics of such signals only very short range radio transmission is feasible. In order to distribute these signals across large distances, analog transmission over optical fiber is considered. In this work, mode-locked laser diodes serve as optoelectronic oscillators for the generation of such signals. Their system-relevant properties are studied in detail.

Body Matched Antennas for Microwave Medical Applications
Body Matched Antennas for Microwave Medical Applications

Author: Li, Xuyang

Publisher: KIT Scientific Publishing

Published: 2014-01-23

Total Pages: 230

ISBN-13: 3731501473

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In this work, new concepts of body-matched antennas for microwave medical applications were developed, where the antennas are placed directly on or in the human body. Two types of antennas were designed - on-body matched antennas for diagnosis and implantable antennas for data telemetry with the main focus of miniaturization yet maintained a high radiation performance. The applicability of the antennas was verified using a medical imaging system for the detection of hemorrhagic stroke.