Download or read book Analysis of Impulse Radio Ultra wideband Systems written by Matteo Sabattini and published by . This book was released on 2006 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-wideband communications are gaining popularity for future indoor wireless high-speed/low-power transmissions, thanks to their versatility and technological features. At the same time, the unlicensed spectrum allocated for ultra-wideband transmissions impose stringent constraints on power emission, as well as coexistence capabilities with other commercial systems. Many technical issues are still open at the present time: the extremely wide bandwidth results in a large number of resolvable multipaths, and, consequently, a high receiver complexity. Furthermore, ultra-wideband systems have to coexist with other ultra-wideband devices, as well as other narrow-band commercial systems. This dissertation addresses some of these issues, and sketches some possible solutions. First, a novel analytical technique is introduced, in order to accurately model the interference at the receiver from other ultra-wideband devices. Second, beamforming techniques are analyzed, in order to mitigate the effect of the aforementioned MAI, as well as the interference from narrow-band commercial systems and jammers. Another open issue for ultra-wideband devices deals with synchronization and acquisition in harsh multipath environments, and in the presence of narrow-band interference. A technique to jointly estimate the channel attenua-ion and acquire code synchronization, based on an approximation of the maximum likelihood criterion, is presented and analyzed.

Download or read book Analysis of Low Power Low Data Rate Ultra Wideband Impulse Radio Systems written by Roman Merz and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Low Power Low Data Rate Ultra Wideband Impulse Radio Systems written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decade, ultra wideband (UWB) systems gained a large interest in the scientific world because of their suitability to realize among others communication systems with tremendous data rates and accurate indoor positioning and location systems. As a differing technology compared to classical narrowband radio transmission systems, UWB requires some novel approaches. Well established methods to develop and analyze narrowband transmission systems remain essentially valid but are not always well tailored or optimal to UWB systems. The need for novel approaches illuminates the reasons why there are still some uncovered topics in the literature, mainly related to the analyses of imperfections and perturbations during an UWB transmission. Consequently, this thesis attempts to cover some of these topics by theoretical studies, numerical simulations, as well as experimental verification.

Download or read book Understanding Ultra Wide Band Radio Fundamentals written by Maria-Gabriella Di Benedetto and published by Pearson Education. This book was released on 2004-06-17 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combines the theory and practical - with simulation tools for the understanding and design of Ultra Wide Band (UWB) communication networks. UWB is a revolutionary technology - recently receiving FCC approval. The UWB standard has several advantages including high transmission rates and the ability to carry signals while accounting for solid matter interference. Provides a theoretical analysis of the fundamentals of UWB radio communications supported by practical examples developed using computer simulations using MATLAB. UWB devices can be used for a variety of communications applications involving the transmission of very high data rates over short distances without suffering the effects of multi-path interference. UWB communication devices could be used to wirelessly distribute services such as phone, cable, and computer networking throughout a building or home. These devices could also be utilized by police, fire, and rescue personnel to provide covert, secure communications devices. The book presents the theoretical analysis of fundamental principles of Ultra Wide Band (UWB) radio communications supported by practical examples developed using computer simulation. The simulation codes are provided in the form of user-customizable MATLAB) functions which are included in the book. The examples are inserted within the theoretical treatise in order to help and guide the reader in the understanding of analytical principles. The book covers issues related to both UWB signal transmission and UWB network organization. In particular, the topics covered by the book are: principles of UWB radio transmission and modulation (PPM, PAM and DS-UWB for Impulse Radio, OFDM for the multi-band approach), UWB channel modeling, receiver structures, Multi User Interference modeling, Localization, Network organization: advanced Medium Access Control and routing design strategies.

Download or read book Analysis and Design of Cmos Ultra Wideband Impulse Radio Transceiver written by Li Qiang and published by LAP Lambert Academic Publishing. This book was released on 2010-06 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultra-wideband (UWB) impulse-radio technology has unique features including high data-rate as well as low power consumption with ranging and localization capabilities. An UWB front-end, however, has to accommodate design challenges resulting from the exceptional wide bandwidth of several GHz. This book discusses the implementation issues of the UWB impulse-radio transceiver front-end, including the performance analysis of practical systems and the design of radio-frequency integrated circuits for transceiver front-ends. A general framework for performance evaluation of practical impulse radio system is proposed and demonstrated in scenarios of high-speed data communications as well as low-data-rate wireless body-area networks. An inductorless low- noise amplifier is designed with syncretic adoption of thermal noise canceling, capacitor peaking, and current reuse. The CMOS ransmit/receive switch design with highest reported bandwidth and power handling capability are discussed with customized transistor layout and triple-well resistive body- floating techniques. The prototypes have been demonstrated in state-of-the-art 130nm CMOS technology.

Download or read book Ultrawideband Short Pulse Radio Systems written by Vladimir I. Koshelev and published by Artech House. This book was released on 2017-04-30 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: This resource provides a comprehensive treatment of the methods, analysis, and practice of impulse and ultrawideband (UWB) systems. Sources, antennas, propagation, electromagnetic theory, and actual practical systems are explored.This book provides novel perspective on impulse and short-pulse wireless engineering along with practical guidance on how to build antennas and radio hardware for high-power impulse signals. Theoretical and experimental results in the time-frequency domain are presented. The book explains and discusses the scattering of UWB electromagnetic pulses by conducting and dielectric objects. Impulse responses of objects and propagation channels are explored with details of signal models and their spectral characteristics and uses of regularization of a Kramers-Kroning type relation for estimating transfer functions. Readers gain insight into the development of high-power sources of UWB radiation with megavolt effective potential on the base of combined antenna arrays excited with bipolar voltage pulses. This in-depth volume includes chapters on receiving antennas, transmitting antennas, and antenna arrays along with details on high-power UWB radiation sources as well as problem sets.

Download or read book Realization Limits of Impulse Radio UWB Indoor Localization Systems written by Zwirello, Lukasz and published by KIT Scientific Publishing. This book was released on 2014-05-06 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Realization Limits of Impulse Radio UWB Indoor Localization Systems written by Lukasz Zwirello and published by . This book was released on 2020-10-09 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.

Download or read book Design and Analysis of an Integrated Impulse Radio Ultra Wideband Primary Radar System written by An Xin and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra Wideband Radio Propagation Channels written by Pascal Pagani and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band (UWB) technology consists of transmitting radio signals over frequency bandwidths from 500 MHz to several GHz. Its unique characteristics may be exploited for the design of high data rate wireless communication systems, as well as localization and imaging applications. The development and optimization of such systems require a precise knowledge of the radio transmission medium. This book examines all aspects of the propagation channel for UWB systems. UWB technology is first presented, with a particular emphasis being placed on its applications, spectrum regulation issues, and the different communication techniques. The authors introduce the theoretical bases of radioelectric propagation and give an overview of the channel sounding techniques adapted for UWB signals. The two main principles of UWB channel modeling are finally exposed and illustrated: deterministic channel modeling, based on the simulation of the propagation phenomena in a given environment, and statistical channel modeling, which relies on the experimental analysis of the main channel characteristics.

Download or read book Synchronization in Impulse Radio Ultra wideband Communication Systems written by Sandeep Aedudodla and published by . This book was released on 2006 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-wideband (UWB) communication has recently generated a significant amount of interest and is a primary physical layer candidate for wireless personal area network (WPAN) standards aimed at both high data rate and low data rate applications. Ultra-wideband spread spectrum systems employing impulse radio signaling are being considered for these applications. The UWB channel is a dense multipath channel with a large delay spread and highly resolvable multipath components, owing to the narrow pulses employed. In any communication system, the receiver requires knowledge of the timing information of the received signal to accomplish demodulation. The process of obtaining this timing information is known as synchronization. Spread spectrum systems typically achieve synchronization in two stages: acquisition and tracking. The acquisition stage attempts to achieve coarse synchronization to within a chip duration by evaluating the phases in the search space and the tracking stage employs a code tracking loop to maintain fine synchronization. Ultra-wideband systems employ long spreading sequences to eliminate spectral lines resulting from pulse repetition. Moreover, the short pulses employed result in a fine resolution of the search space. Due to these reasons, UWB acquisition systems face a large search space which results in a large amount of time for the system to successfully acquire the signal. This results in long preambles in a packet-based WPAN which adversely affects the network throughput. The dense resolvable multipath results in the existence of multiple phases which can be considered to be a good estimate of the true phase. In this dissertation, we define a hit set to be the set of phases which guarantee a nominal demodulation performance subsequent to acquisition. We focus on signal design and the development of efficient acquisition schemes which significantly reduce the mean detection time through search space reduction. One such design is the proposed hybrid direct sequence-time hopping (DS-TH) signaling format and a two-stage acquisition scheme which combats the large search space problem in impulse radio UWB systems. We study the acquisition problem in transmitted reference (TR) UWB systems with DS signaling and design a two-stage acquisition scheme which greatly reduces the mean detection time. We also consider the fine timing estimation problem in impulse radio systems in which the receiver does not have knowledge of the received pulse shapes or the channel. We derive the Cramer-Rao lower bound and maximum likelihood estimators for pilot-assisted and non-pilot-assisted cases, and compare their performance to sub-optimal methods with lower complexity.

Download or read book Design and Analysis of a Low power Low complexity Ultra Wideband Impulse Radio Transmitter written by Xiaomin Chen and published by . This book was released on 2007 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultrawideband Short Pulse Radio Systems written by and published by . This book was released on 2018-05 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-wideband (UWB), short-pulse (SP) electromagnetics are now being used for an increasingly wide variety of applications, including collision avoidance radar, concealed object detection, and communications. Notable progress in UWB and SP technologies has been achieved by investigations of their theoretical bases and improvements in solid-state manufacturing, computers, and digitizers. UWB radar systems are also being used for mine clearing, oil pipeline inspections, archeology, geology, and electronic effects testing. This book 'Ultrawideband Short-Pulse Radio Systems' provides a comprehensive treatment of the methods, analysis, and practice of impulse and ultrawideband (UWB) systems. It presents key insight into cutting edge information on impulse and short-pulse wireless engineering together with practical guidance on how to build antennas and radio hardware for high-power impulse signals. During the last decade, there has been much progress on UWB technologies. To understand the behavior of UWB signals, the UWB propagation channel is measured and characterized. Different channel models for practical UWB systems have been proposed in multipath environments. Since UWB signals potentially have high resolution in ranging, the different UWB ranging systems, in multipath environments, have been investigated. It includes contributions from world-wide researchers and authors on electromagnetic theory, time-domain computational techniques, modeling, antennas, pulsed-power, UWB interactions, radar systems, UWB communications, and broadband systems and components.This book serves as an up to date guide for advanced graduate students, practitioners, and scientists working in these applications areas.

Download or read book Ultra wideband RF System Engineering written by Thomas Zwick and published by Cambridge University Press. This book was released on 2013-10-03 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Ultra Wideband Wireless Communication written by Huseyin Arslan and published by John Wiley & Sons. This book was released on 2006-10-06 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: ULTRA WIDEBAND WIRELESS COMMUNICATION AN INTERNATIONAL PANEL OF EXPERTS PROVIDE MAJOR RESEARCH ISSUES AND A SELF-CONTAINED, RAPID INTRODUCTION TO THE THEORY AND APPLICATION OF UWB This book delivers end-to-end coverage of recent advances in both the theory and practical design of ultra wideband (UWB) communication networks. Contributions offer a worldwide perspective on new and emerging applications, including WPAN, sensor and ad hoc networks, wireless telemetry, and telemedicine. The book explores issues related to the physical layer, medium access layer, and networking layer. Following an introductory chapter, the book explores three core areas: Analysis of physical layer and technology issues System design elements, including channel modeling, coexistence, and interference mitigation and control Review of MAC and network layer issues, up to the application Case studies present examples such as network and transceiver design, assisting the reader in understanding the application of theory to real-world tasks. Ultra Wideband Wireless Communication enables technical professionals, graduate students, engineers, scientists, and academic and professional researchers in mobile and wireless communications to become conversant with the latest theory and applications by offering a survey of all important topics in the field. It also serves as an advanced mathematical treatise; however, the book is organized to allow non-technical readers to bypass the mathematical treatments and still gain an excellent understanding of both theory and practice.

Download or read book Impulse Radio Ultra Wideband Systems for Vital Sign Monitoring and Short Range Communications written by Bernd Schleicher and published by . This book was released on 2012 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Analysis and Effect of Multi user Interference for Ultra Wideband Communications written by Mukta Athavale and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-Wideband (UWB) is an upcoming technology for short-range high data rate applications like Wireless Personal Area Networks or medium/long-range low data rate applications like sensor networks. UWB has many captivating characteristics such as very short duration pulses (order of nanoseconds), multipath channel, large instantaneous bandwidth and time hopping pulse trains resulting in coexistence with the existing narrow band users. The Ultra Wideband communication systems employ the technique of Impulse radio of transmitting short duration pulses which result in extremely wide bandwidth and many performance benefits. Since UWB systems operate in dense multipath environments, RAKE receiver is the optimum choice for the receiver. Considering the evolving nature and the wide applications of this technology, it is important to analyze the system performance for different scenarios including the multi-user environment. My thesis mainly targets the analysis of the bit error rate (BER) performance of the time hopping pulse position modulation (TH-PPM) UWB system with the use of Ideal Rake Receiver and the performance degradation when the Selective and Partial Rake receivers are employed. I have also analyzed the effect of changing the repletion code length on the performance. The performance analysis is carried out for varying the modulation index M by employing 4-PPM instead of Binary PPM and simulation results show that 4-PPM offers a worse performance to the binary PPM case. Furthermore, I have evaluated the performance in the presence of Multiuser Interference using the Standard Gaussian Approximation. Finally, the performance of employing M-ary PPM in the multi-user scenario is also evaluated. The simulations are performed under the assumption of perfect channel knowledge. The IEEE UWB indoor channel model is used for Non Line of Sight (NLOS) Case C which is for 4 to 10 m distance between the transmitter and the receiver.