Download or read book Performance Analysis of Ultra Wideband Communication Systems written by LakshmiNarasimhan SrinivasaRaghavan and published by . This book was released on 2011 with total page 120 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.

Download or read book Ultra wideband Wireless Communication Systems written by Dajana Cassioli and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Ultra Wideband Communications Systems written by W. Pam Siriwongpairat and published by John Wiley & Sons. This book was released on 2007-11-16 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only book that provides full coverage of UWB multiband OFDM technology Ultra-wideband (UWB) has emerged as a technology that offers great promise to satisfy the growing demand for low-cost, high-speed digital networks. The enormous bandwidth available, the potential for high data rates, and the promise for small size and low processing power with reduced implementation cost all present a unique opportunity for UWB to become a widely adopted radio solution for future wireless home networking technology. Ultra-Wideband Communications Systems is the first book to provide comprehensive coverage of the fundamental and advanced issues related to UWB technology, with a particular focus on multiband orthogonal frequency division multiplexing (multiband OFDM). The multiband OFDM approach was a leading method in the IEEE 802.15.3astandard and has recently been standardized by ECMA International. The book also explores several major advanced state-of-the-art technologies to enhance the performance of the standardized multiband OFDM approach. Additional coverage includes: * Characteristics of UWB channels * An overview of UWB single-band and multiband OFDM approaches * MIMO multiband OFDM * Performance characterization * Performance under practical considerations * Differential multiband OFDM * Power-controlled channel allocation * Cooperative UWB multiband OFDM Complete with pointers for future research opportunities to enhance the performance of UWB multiband OFDM technology over current and future wireless networks, this is an indispensable resource for graduate students, engineers, and academic and industrial researchers involved with UWB.

Download or read book Performance Analysis of Ultra Wideband written by Rama Kondadasu and published by . This book was released on 2005 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Applications of the UWB Technologies written by Boris Lembrikov and published by IntechOpen. This book was released on 2011-08-01 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra wideband (UWB) communication systems are characterized by high data rates, low cost, multipath immunity, and low power transmission. In 2002, the Federal Communication Commission (FCC) legalized low power UWB emission between 3.1 GHz and 10.6 GHz for indoor communication devices stimulating rapid development of UWB technologies and applications. The proposed book Novel Applications of the UWB Technologies consists of 5 parts and 20 chapters concerning the general problems of UWB communication systems, and novel UWB applications in personal area networks (PANs), medicine, radars and localization systems. The book will be interesting for engineers and researchers occupied in the field of UWB technology.

Download or read book Channel Modeling and Performance Analysis of Ultra Wideband In body Communication written by Jan-Christoph Brumm and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless capsule endoscopes are a proven method for the diagnosis of gastrointestinal diseases. In this thesis, ultra wideband communication is investigated as an alternative to common narrowband transmission to increase the video quality. A reproducible and flexible channel model for ultra wideband in-body communication is derived. Based on this, fundamental limits for the communication performance are investigated by computing the channel capacity. The influence of different human body models, the receive antenna placement, and the dielectric properties of human tissue on the channel capacity are analyzed. Furthermore, an exemplary ultra wideband communication system is designed and its bit error probability is evaluated.

Download or read book UWB Communication Systems written by Maria-Gabriella Di Benedetto and published by Hindawi Publishing Corporation. This book was released on 2006 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrawideband (UWB) communication systems offer an unprecedented opportunityto impact the future communication world. The enormous available bandwidth, the wide scope of the data rate / rangetrade-off, as well as the potential for very low-cost operation leading topervasive usage, all present a unique opportunity for UWB systems to impactthe way people and intelligent machines communicate and interact with theirenvironment. The aim of this book is to provide an overview of the state of the art of UWBsystems from theory to applications. Due to the rapid progress of multidisciplinary UWB research, such an overviewcan only be achieved by combining the areas of expertise of severalscientists in the field. More than 30 leading UWB researchers and practitioners have contributed tothis book covering the major topics relevant to UWB. These topics includeUWB signal processing, UWB channel measurement and modeling, higher-layerprotocol issues, spatial aspects of UWB signaling, UWB regulation andstandardization, implementation issues, and UWB applications as well aspositioning. The book is targeted at advanced academic researchers, wireless designers, and graduate students wishing to greatly enhance their knowledge of allaspects of UWB systems

Download or read book Performance Evaluation of Multi User Uwb Communication Systems written by Murad Ali and published by LAP Lambert Academic Publishing. This book was released on 2011-05 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra wide-band is based on transmission with very short pulses of low energy.The wider bandwidth of UWB technology has several advantages such as excellent penetration ability, multi-user support and high channel capacity.UWB poses design challenges for low power and low complex systems at wider bandwidth.For digital systems, it also requires high sampling rate and intensive computation to estimate gain and delay of multi path channel. The performance of non-coherent transmitted reference (TR), frequency-shifted reference (FSR) and code- shifted reference (CSR) systems are compared with the orthogonal Gold code (OG) code reference (CR) systems for single and multiuser for low data rates. First, the performance of non-coherent receivers for single-user system working in residential LOS is evaluated.Secondly, the performance comparison of TR, FSR, CSR and OG-CR are presented in multiuser environment. The simulation results validate that CSR and OG-CR have better performance than TR and FSR in multiuser environment. Finally, results show that CSR shows better performance than OG-CR for few users and almost same performance as OG-CR at high SNR with more number of users.

Download or read book Understanding Ultra Wide Band Radio Fundamentals written by Maria-Gabriella Di Benedetto and published by Prentice Hall. This book was released on 2004 with total page 538 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 Performance Analysis of Ultra wideband Transmitted Reference System and Enhancement Techniques written by Satish Kaza and published by . This book was released on 2004 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra wide Band in Communications written by Burak Berksoy and published by . This book was released on 2008 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last ten years, Ultra-Wide Band (UWB) technology has attracted tremendous research attention. Frequency allocation of 3.1-10.6 GHz for UWB application by FCC made it apparent that UWB will be the technology for future wireless high speed communication applications. With the promise of high data rates (high channel capacity), UWB also offers advantages such as communication security, high multi-path resolution, good penetration capability, ability to coexist with other communication schemes in the same band, and finally, circuit simplicity. The theoretical advantages of UWB has made it a great candidate for short distance communications, however, UWB communications have many challenges, for example, sub-nanosecond pulse generation, timing sensitivity of modulation and synchronization, flat antenna performance over a wide bandwidth, effect of existing systems on UWB systems. In order to experiment with various UWB modulation schemes, and to study transmitter and receiver structures, an accurate channel model need be established. In this dissertation, our first contribution is to evaluate and implement two major statistical channel models. The first model is proposed by AT & T Labs and is in the form of an autoregressive IIR filter. Although this is an accurate channel model to represent UWB behavior, it is proposed before the allocation of 3.1-10.6 GHz frequency band, hence, it could not simulate the correct frequency spectrum. The second model is proposed by Saleh and Valenzuela, which has been widely accepted by UWB community to be the most accurate channel model for UWB systems. Recently disbanded task group 802.15.3a which was assigned to standardize a UWB communication scheme has also accepted the latter model. Our second contribution is to derive optimal pulses for PPM signals. Using the accurate channel model in computer simulations, we experimented on various UWB communication schemes. We found that the traditional UWB pulses being used in pulse position modulated UWB systems did not perform optimally. A set of optimized UWB pulses and the methodology to calculate optimal pulses for any modulation index for PPM systems have been proposed in this dissertation. It is found that the optimal pulse can improve the performance of UWB systems by as much as 0.7 dB. With the PPM pulse optimization, the theoretical performance limits of PPM systems are derived. The third contribution from this dissertation is to design near optimal practical implementable receiver structures. Some of the results obtained from PPM pulse optimization are found to be theoretical and not practical. More practical approach to the receiver structures were needed for industrial interest. We proposed simple sub-optimal receiver structures that are able to perform only a few dB less than the optimal receivers are proposed. These simple, low-cost receiver structures are strong alternatives to the complex traditional optimal receivers.

Download or read book Indoor Ultra wideband Communication Channel Characteristics and System Performance written by Yongwei Zhang and published by . This book was released on 2007 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Ultra wideband Communication Systems written by John Duggue Choi and published by . This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Wireless Communication Systems in Ultra wideband Interference and Non Gaussian Noise written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The growing demand for high speed wireless applications and the scarcity of the spectral resources has necessitated the development of new concepts that enable more efficient utilization of the frequency spectrum. Ultra-wideband (UWB) is an emerging technology that is capable of utilizing the spectral resources more effectively by sharing the spectrum with other applications. This spectrum sharing however can potentially result in harmful interference from UWB systems to devices co-existing in the same frequency band. Therefore, in order to guarantee peaceful co-existence, the effects of UWB interference on co-existing systems have to be carefully analyzed. Towards this goal, in this thesis, we first study the effects of multi-band (MB) orthogonal frequency-division multiplexing (OFDM) UWB interference on a generic uncoded narrowband (NB) system. For this purpose, we develop analytical expressions for the amplitude probability distribution (APD) and the bit error rate (BER) performance of the NB system in the presence of MB-OFDM interference. We use the obtained results to assess the accuracy of the Gaussian approximation (GA) for MB-OFDM UWB interference. We show that for most channel models and signal bandwidths the GA is unable to accurately predict the NB system performance and the exact BER analysis has to be used to obtain meaningful results. We also analyze the effects of UWB interference in a more general framework that allows us to study the impact of general types of non-Gaussian noise and interference on generic uncoded victim systems. Specifically, we present a unified asymptotic symbol error rate (SER) analysis of linearly modulated systems impaired by fading and generic non- Gaussian noise and interference. Our analysis also encompasses diversity reception with equal gain and selection combining and is extended to binary orthogonal modulation. The obtained asymptotic results show that for high signal-to-noise ratios (SNRs) the SER of the victim system.

Download or read book An Introduction to Ultra Wideband Communication Systems written by Jeffrey Hugh Reed and published by Prentice Hall. This book was released on 2005 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: Breaks down the fundamentals of UWB, equipping engineers with the understanding of this newly approved communication standard.