Author: Wim Vereecken Publisher: Springer Science & Business Media ISBN: 9048124506 Category : Technology & Engineering Languages : en Pages : 263
Book Description
Today’s booming expanse of personal wireless radio communications is a rich source of new challenges for the designer of the underlying enabling te- nologies. Personal communication networks are designed from a fundam- tally different perspective than broadcast service networks, such as radio and television. While the focus of the latter is on reliability and user comfort, the emphasis of personal communication devices is on throughput and mobility. However, because the wireless channel is a shared transmission medium with only very limited resources, a trade-off has to be made between mobility and the number of simultaneous users in a con?ned geographical area. Accord- 1 ing to Shannon’s theorem on channel capacity, the overall data throughput of a communication channel bene?ts from either a linear increase of the tra- mission bandwidth, or an (equivalent) exponential increase in signal quality. Consequently, it is more bene?cial to think in terms of channel bandwidth than it is to pursue a high transmission power. All the above elements are embodied in the concept of spatial ef?ciency. By describing the throughput of a system 2 in terms of bits/s/Hz/m , spatial ef?ciency takes into account that the use of a low transmission power reduces the operational range of a radio transmission, and as such enables a higher reuse rate of the same frequency spectrum.
Author: Vladimir I. Koshelev Publisher: Artech House ISBN: 1630814431 Category : Technology & Engineering Languages : en Pages : 445
Book Description
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.
Author: Kazimierz Siwiak Publisher: John Wiley & Sons ISBN: 0470859326 Category : Technology & Engineering Languages : en Pages : 264
Book Description
Ultra-wideband (UWB) has been among the most controversial technologies of modern times. Its applications seem endless, its capabilities miraculous and yet it is so poorly understood. In this volume, the authors combine talents to de-mystify ultra-wideband radio and explain it in language that is accessible to non-technologists as well as technologists. They contrast UWB with conventional radio technology so that fundamental, technically accurate information devoid of specific technical and analytical details is accessible for marketing managers, business developers, engineering managers, technology managers, potential investors, financial analysts, executive recruiters, technical writers, and technologists from other fields. The authors also include enough specific technical and engineering information about UWB, for the seasoned technologists, engineers, scientists and academicians who need to understand the topic at an entry level. Provides simple high level, conceptual discussions of UWB followed with more detailed, scientific, mathematical, engineering focused explanations Presents a global perspective by tracing UWB throughout the history of radio, providing a modern basis for the re-emergence of the technology and for the current regulatory and standards activities Features insights into the reasons why the technology developed the way it did Explains the key advantages of UWB, including its bandwidth, potential simplicity and huge system capacity Discusses the applications of UWB in terms of the unique properties and advantages of UWB Ultra-wideband Radio Technology will inform, educate and inspire!...
Author: Maria-Gabriella Di Benedetto Publisher: Prentice Hall ISBN: Category : Computers Languages : en Pages : 538
Book Description
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.
Author: Marian Verhelst Publisher: Springer Science & Business Media ISBN: 9048126940 Category : Technology & Engineering Languages : en Pages : 249
Book Description
Smart energy management, both at design time and at run time, is indispensable in modern radios. It requires a careful trade-off between the system’s performance, and its power consumption. Moreover, the design has to be dynamically reconfigurable to optimally balance these parameters at run time, depending on the current operating conditions. Energy Scalable Radio Design describes and applies an energy-driven design strategy to the design of an energy-efficient, highly scalable, pulsed UWB receiver, suitable for low data rate communication and sub-cm ranging. This book meticulously covers the different design steps and the adopted optimizations: System level air interface selection, architectural/algorithmic design space exploration, algorithmic refinement (acquisition, synchronization and ranging algorithms) and circuit level (RTL) implementation based on the FLEXmodule-concept. Measurement results demonstrate the effectiveness and necessity of the energy-driven design strategy.
Author: Alyssa Apsel Publisher: Springer Science & Business Media ISBN: 1461418453 Category : Technology & Engineering Languages : en Pages : 159
Book Description
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.
Author: Xuemin Shen Publisher: John Wiley & Sons ISBN: 0470028513 Category : Technology & Engineering Languages : en Pages : 322
Book Description
Learn about Ultra-wideband (UWB) transmission - the most talked about application in wireless communications. UWB wireless communication is a revolutionary technology for transmitting large amounts of digital data over a wide spectrum of frequency bands with very low power for a short distance. This exciting new text covers the fundamental aspects of UWB wireless communications systems for short-range communications. It also focuses on more advanced information about networks and applications. Chapters include: Radio Propagation and Large Scale Variations, Pulse Propagation and Channel Modelling, MIMO (Multiple Input, Multiple Output) RF Subsystems and Ad Hoc Networks. Focuses on UWB wireless communications rather than UWB radar, which has been covered before. Provides long and short-term academic and technological value. Teaches readers the fundamentals, challenges and up-to-date technical processes in this field.
Author: Reiner Thomä Publisher: BoD – Books on Demand ISBN: 9535109367 Category : Technology & Engineering Languages : en Pages : 514
Book Description
Ultra-Wideband Radio (UWB) earmarks a new radio access philosophy and exploits several GHz of bandwidth. It promises high data rate communication over short distances as well as innovative radar sensing and localization applications with unprecedented resolution. Fields of application may be found, among others, in industry, civil engineering, surveillance and exploration, for security and safety measures, and even for medicine. The book considers the basics and algorithms as well as hardware and application issues in the field of UWB radio technology for communications, localization and sensing based on the outcome of DFG's priority-funding program "Ultra-Wideband Radio Technologies for Communications, Localization and Sensor Applications (UKoLoS)".
Author: Boris Lembrikov Publisher: IntechOpen ISBN: 9789533073248 Category : Technology & Engineering Languages : en Pages : 456
Book Description
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.
Author: Antonio Mollfulleda Publisher: LAP Lambert Academic Publishing ISBN: 9783659325489 Category : Languages : en Pages : 164
Book Description
Ultra-wideband (UWB) communications based on impulse radio introduces some advances in impulse radio system architecture, bringing together theoretical models and practical implementation circuits. The book covers a variety of transmitter and receiver techniques and architectures to optimize the performance of an UWB communication system compliant to the Federal Communications Commission (FCC) spectral regulations. The most relevant contribution focuses on the advantages of the Frequency Sampling Receiver (FDS) by presenting a class of FDS receiver based on microwave filter-bank implemented on distributed planar technology. The mathematical theory of frames is used to characterize the signal space and provides an algorithm to digitally reconstruct the received signal. This work presents an end-to-end concept demonstrator that includes a variety of novel topologies of UWB passive devices based on distributed planar technology such as pulse shaping networks, a pulse inverter/non-inverter, a power splitter and the filter-bank.
Author: Wim Vereecken
Author: Vladimir I. Koshelev
Author: Kazimierz Siwiak
Author: Maria-Gabriella Di Benedetto
Author: Marian Verhelst
Author: Alyssa Apsel
Author: Xuemin Shen
Author: Reiner Thomä
Author: Boris Lembrikov
Author: Antonio Mollfulleda