Limitations of Experimental Channel Characterisation

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Publisher : GRIN Verlag
ISBN 13 : 3640209893
Total Pages : 282 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis Limitations of Experimental Channel Characterisation by : Markus Landmann

Download or read book Limitations of Experimental Channel Characterisation written by Markus Landmann and published by GRIN Verlag. This book was released on 2009-01-27 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doctoral Thesis / Dissertation from the year 2008 in the subject Electrotechnology, grade: summa cum laude, Technical University of Ilmenau, 152 entries in the bibliography, language: English, abstract: This thesis deals with Experimental Channel Characterisation and its performance limits in real propagation environments. This includes recording of the multidimensional wideband channel matrix by using a MIMO channel sounder and antenna arrays at both sides of the link. High-resolution parameter estimation is finally applied to characterise the channel in terms of DoD, DoA, TDoA, and complex polarimetric path weights. The quality of these estimates in "real world" scenarios is degraded by several impairments of the practical antenna arrays and the measurement system used. The resulting estimation quality limits are investigated in detail by simulations and measurements. The entire processing chain is analysed in terms of possible error sources. To this end, measurement system impairments, antenna array calibration errors as well as limitations of the radio channel model comprising two parts: specular like reflections (SC) and distributed diffuse scattering (DMC) applied by the high-resolution parameter estimation procedure are investigated. Moreover, consequences of using these results to deduce and parameterise geometry based channel models are demonstrated. The contributions of this thesis are of interest for researchers dealing with high-resolution parameter estimation and channel modelling and can be summarised as follows: - the efficient and accurate radiation pattern modelling of antenna arrays, - the powerful performance evaluation framework for practical antenna arrays, - the exposure of consequence of modelling errors on parameter estimation, - and the demonstration of overall limitations of Experimental Channel Characterisation.

OFDM

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Publisher : Springer Science & Business Media
ISBN 13 : 3642174965
Total Pages : 261 pages
Book Rating : 4.6/5 (421 download)

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Book Synopsis OFDM by : Hermann Rohling

Download or read book OFDM written by Hermann Rohling and published by Springer Science & Business Media. This book was released on 2011-03-22 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Preliminary): The Orthogonal Frequency Division Multiplexing (OFDM) digital transmission technique has several advantages in broadcast and mobile communications applications. The main objective of this book is to give a good insight into these efforts, and provide the reader with a comprehensive overview of the scientific progress which was achieved in the last decade. Besides topics of the physical layer, such as coding, modulation and non-linearities, a special emphasis is put on system aspects and concepts, in particular regarding cellular networks and using multiple antenna techniques. The work extensively addresses challenges of link adaptation, adaptive resource allocation and interference mitigation in such systems. Moreover, the domain of cross-layer design, i.e. the combination of physical layer aspects and issues of higher layers, are considered in detail. These results will facilitate and stimulate further innovation and development in the design of modern communication systems, based on the powerful OFDM transmission technique.

Multipath Exploitation for Emitter Localization using Ray-Tracing Fingerprints and Machine Learning

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Publisher : BoD – Books on Demand
ISBN 13 : 3863602447
Total Pages : 270 pages
Book Rating : 4.8/5 (636 download)

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Book Synopsis Multipath Exploitation for Emitter Localization using Ray-Tracing Fingerprints and Machine Learning by : Marcelo Nogueira de Sousa

Download or read book Multipath Exploitation for Emitter Localization using Ray-Tracing Fingerprints and Machine Learning written by Marcelo Nogueira de Sousa and published by BoD – Books on Demand. This book was released on 2021-01-01 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: The precise localization of radio frequency (RF) transmitters in outdoor environments has been an important research topic in various fields for several years. Nowadays, the functionalities of many electronic devices are based on the position data of a radiofrequency transmitter using a Wireless Sensor Network (WSN). Spatially separated sensor scan measure the signal from the transmitter and estimate its location using parameters such as Time Of Arrival (ToA), Time Difference Of Arrival (TDOA), Received Signal Strength (RSS) or Direction Of Arrival (DOA). However, certain obstacles in the environment can cause reflection, diffraction, or scattering of the signal. This so called multipath effect affects the measurements for the precise location of the transmitter. Previous studies have discarded multipath information and have not considered it valuable for locating the transmitter. Some studies used ray tracing (RT) to create position fingerprints, without reference measurements, in a simulated scenario. Others tested this concept with real measurement data, but this proved to be a more cumbersome method due to practical problems in the outdoor environment. This thesis exploits the concept of Channel Impulse Response (CIR) to address the problem of precision in outdoor localization environments affected by multipath. The study aims to fill the research gap by combining multipath information from simulation with real measurements in a machine learning framework. The research question was whether the localization could be improved by combining real measurements with simulations. We propose a method that uses the multipath fingerprint information from RT simulation with reference transmitters to improve the location estimation. To validate the effectiveness of the proposed method, we implemented a TDoA location system enhanced with multipath fingerprints in an outdoor scenario. This thesis investigated suburban and rural areas using well-defined reflective components to characterize the localization multipath pattern. The results confirm the possibility of using multipath effects with real measurements to enhance the localization in outdoor situations. Instead of rejecting the multipath information, we can use them as an additional source of information.

Propagation Channel Characterization, Parameter Estimation, and Modeling for Wireless Communications

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Publisher : John Wiley & Sons
ISBN 13 : 1118188233
Total Pages : 418 pages
Book Rating : 4.1/5 (181 download)

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Book Synopsis Propagation Channel Characterization, Parameter Estimation, and Modeling for Wireless Communications by : Xuefeng Yin

Download or read book Propagation Channel Characterization, Parameter Estimation, and Modeling for Wireless Communications written by Xuefeng Yin and published by John Wiley & Sons. This book was released on 2016-10-24 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference giving a thorough explanation of propagation mechanisms, channel characteristics results, measurement approaches and the modelling of channels Thoroughly covering channel characteristics and parameters, this book provides the knowledge needed to design various wireless systems, such as cellular communication systems, RFID and ad hoc wireless communication systems. It gives a detailed introduction to aspects of channels before presenting the novel estimation and modelling techniques which can be used to achieve accurate models. To systematically guide readers through the topic, the book is organised in three distinct parts. The first part covers the fundamentals of the characterization of propagation channels, including the conventional single-input single-output (SISO) propagation channel characterization as well as its extension to multiple-input multiple-output (MIMO) cases. Part two focuses on channel measurements and channel data post-processing. Wideband channel measurements are introduced, including the equipment, technology and advantages and disadvantages of different data acquisition schemes. The channel parameter estimation methods are then presented, which include conventional spectral-based estimation, the specular-path-model based high-resolution method, and the newly derived power spectrum estimation methods. Measurement results are used to compare the performance of the different estimation methods. The third part gives a complete introduction to different modelling approaches. Among them, both scattering theoretical channel modelling and measurement-based channel modelling approaches are detailed. This part also approaches how to utilize these two modelling approaches to investigate wireless channels for conventional cellular systems and some new emerging communication systems. This three-part approach means the book caters for the requirements of the audiences at different levels, including readers needing introductory knowledge, engineers who are looking for more advanced understanding, and expert researchers in wireless system design as a reference. Presents technical explanations, illustrated with examples of the theory in practice Discusses results applied to 4G communication systems and other emerging communication systems, such as relay, CoMP, and vehicle-to-vehicle rapid time-variant channels Can be used as comprehensive tutorial for students or a complete reference for engineers in industry Includes selected illustrations in color Program downloads available for readers Companion website with program downloads for readers and presentation slides and solution manual for instructors Essential reading for Graduate students and researchers interested in the characteristics of propagation channel, or who work in areas related to physical layer architectures, air interfaces, navigation, and wireless sensing

Simulation Tools and Techniques

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Publisher : Springer Nature
ISBN 13 : 3031575237
Total Pages : 319 pages
Book Rating : 4.0/5 (315 download)

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Book Synopsis Simulation Tools and Techniques by : José-Luis Guisado-Lizar

Download or read book Simulation Tools and Techniques written by José-Luis Guisado-Lizar and published by Springer Nature. This book was released on with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultra-Wideband Radio Propagation Channels

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Publisher : John Wiley & Sons
ISBN 13 : 1118622960
Total Pages : 185 pages
Book Rating : 4.1/5 (186 download)

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Book Synopsis Ultra-Wideband Radio Propagation Channels by : Pascal Pagani

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.

Radio Propagation Measurement and Channel Modelling

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Publisher : John Wiley & Sons
ISBN 13 : 0470751843
Total Pages : 423 pages
Book Rating : 4.4/5 (77 download)

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Book Synopsis Radio Propagation Measurement and Channel Modelling by : Sana Salous

Download or read book Radio Propagation Measurement and Channel Modelling written by Sana Salous and published by John Wiley & Sons. This book was released on 2013-04-22 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: While there are numerous books describing modern wireless communication systems that contain overviews of radio propagation and radio channel modelling, there are none that contain detailed information on the design, implementation and calibration of radio channel measurement equipment, the planning of experiments and the in depth analysis of measured data. The book would begin with an explanation of the fundamentals of radio wave propagation and progress through a series of topics, including the measurement of radio channel characteristics, radio channel sounders, measurement strategies, data analysis techniques and radio channel modelling. Application of results for the prediction of achievable digital link performance would be discussed with examples pertinent to single carrier, multi-carrier and spread spectrum radio links. This work would address specifics of communications in various different frequency bands for both long range and short range fixed and mobile radio links.

Response of the High Granularity Calorimeter HGCAL and Characterisation of the Higgs Boson

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Publisher : Springer Nature
ISBN 13 : 3031268334
Total Pages : 281 pages
Book Rating : 4.0/5 (312 download)

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Book Synopsis Response of the High Granularity Calorimeter HGCAL and Characterisation of the Higgs Boson by : Matteo Bonanomi

Download or read book Response of the High Granularity Calorimeter HGCAL and Characterisation of the Higgs Boson written by Matteo Bonanomi and published by Springer Nature. This book was released on 2023-05-23 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the most complete characterization of the Higgs boson properties performed to date in the "golden channel," i.e., decay into a pair of Z bosons which subsequently decay into four leptons. The data collected by the CMS experiment in the so-called Run-II data-taking period of the LHC are used to produce an extensive set of results that test in detail the predictions of the Standard Model. Given the remarkable predictive power of the SM when including the Higgs boson, possible new physics will require even more extensive studies at higher statistics. A massive upgrade of the detectors is necessary to maintain the current physics performance in the harsh environment of the High-Luminosity LHC (HL-LHC) project, expected to start by the end of 2027. The CMS Collaboration will replace the current endcap calorimeters with a High Granularity Calorimeter (HGCAL). The HGCAL will be the very first large-scale silicon-based imaging calorimeter ever employed in a high-energy physics experiment. This book presents the results of the analysis of the test beam data collected with the first large-scale prototype of the HGCAL. The results of this analysis are used to corroborate the final design of the HGCAL and its nominal physics performance expected for the HL-LHC operations.

Real-time Digital Signal Processing for Software-defined Optical Transmitters and Receivers

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Publisher : KIT Scientific Publishing
ISBN 13 : 3731502577
Total Pages : 246 pages
Book Rating : 4.7/5 (315 download)

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Book Synopsis Real-time Digital Signal Processing for Software-defined Optical Transmitters and Receivers by : Schmogrow, Rene Marcel

Download or read book Real-time Digital Signal Processing for Software-defined Optical Transmitters and Receivers written by Schmogrow, Rene Marcel and published by KIT Scientific Publishing. This book was released on 2014-11-21 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: A software-defined optical Tx is designed and demonstrated generating signals with various formats and pulse-shapes in real-time. Special pulse-shapes such as OFDM or Nyquist signaling were utilized resulting in a highly efficient usage of the available fiber channel bandwidth. This was achieved by parallel data processing with high-end FPGAs. Furthermore, highly efficient Rx algorithms for carrier and timing recovery as well as for polarization demultiplexing were developed and investigated.

Electrophysiology of Unconventional Channels and Pores

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Publisher : Springer
ISBN 13 : 3319201492
Total Pages : 387 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Electrophysiology of Unconventional Channels and Pores by : Anne H. Delcour

Download or read book Electrophysiology of Unconventional Channels and Pores written by Anne H. Delcour and published by Springer. This book was released on 2015-10-23 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to the channels and pores that belong to an eclectic and ubiquitous class of unconventional - perhaps at times strange - pore-forming molecules, which nevertheless play fundamental roles in various organisms. These non-canonical channels may take on various and sometimes complex architectures, such as large beta-barrels or lipid-containing pores. They may originate from bacteria, viruses or intracellular organelles. For some of them, the physiologically relevant substrate may indeed be ions, and for others folded polypeptides. Some are released by cells in a soluble form that has the ability to insert into biological membranes to exert its permeabilizing effect. Many of these unconventional pores have been investigated by electrophysiology, which, by its virtue of focusing on a few or even a single unit, has provided invaluable insight into the mechanisms and structure-function relationships of these remarkable membrane entities. The chapters of this book highlight a representative set of these interesting investigations.

Potassium Channels And Their Modulators

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Publisher : CRC Press
ISBN 13 : 1482272849
Total Pages : 449 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Potassium Channels And Their Modulators by : John M Evans

Download or read book Potassium Channels And Their Modulators written by John M Evans and published by CRC Press. This book was released on 1996-04-01 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Potassium ions K+ ions are vital in physiological processes, particularly with regard to the cardiovascular system. Modulators influence the channels through which these ions flow and the research into modulator drugs of these channels is the subject of rapidly-advancing research. This work is intended to be of use as a tool for those working in th

Wireless Communications

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Publisher : John Wiley & Sons
ISBN 13 : 1119117216
Total Pages : 1014 pages
Book Rating : 4.1/5 (191 download)

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Book Synopsis Wireless Communications by : Andreas F. Molisch

Download or read book Wireless Communications written by Andreas F. Molisch and published by John Wiley & Sons. This book was released on 2022-11-15 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt: An in-depth and comprehensive treatment of wireless communication technology ranging from the fundamentals to the newest research results The expanded and completely revised Third Edition of Wireless Communications delivers an essential text in wireless communication technology that combines mathematical descriptions with intuitive explanations of the physical facts that enable readers to acquire a deep understanding of the subject. This latest edition includes brand-new sections on cutting edge research topics such as massive MIMO, polar codes, heterogeneous networks, non-orthogonal multiple access, as well as 5G cellular standards, WiFi 6, and Bluetooth Low Energy. Together with the re-designed descriptions of fundamentals such as fading, OFDM, and multiple access, it provides a thorough treatment of all the technologies that underlie fifth-generation and beyond systems. A complimentary companion website provides readers with a wealth of old and new material, including instructor resources available upon request. Readers will also find: A thorough introduction to the applications and requirements of modern wireless services, including video streaming, virtual reality, and Internet of Things. Comprehensive explorations of wireless propagation mechanisms and channel models, ranging from Rayleigh fading to advanced models for MIMO communications. Detailed discussions of single-user communications fundamentals, including modern coding techniques, multi-carrier communications, and single-user MIMO. Extensive description of multi-user communications, including packet radio systems, CDMA, scheduling, admission control, cellular and ad-hoc network design, and multi-user MIMO. In-depth examinations of advanced topics in wireless communication, like speech and video coding, cognitive radio, NOMA, network coding, and wireless localization. A comprehensive description of the key wireless standards, including LTE, 5G, WiFi, Bluetooth, and an outlook to Beyond 5G systems. Perfect for advanced undergraduate and graduate students with a basic knowledge of standard communications, Wireless Communications will also earn a place in the libraries of researchers and system designers seeking a one-stop resource on wireless communication technology.

Radio Propagation Measurements and Channel Modeling

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Publisher : Cambridge University Press
ISBN 13 : 1009100718
Total Pages : 305 pages
Book Rating : 4.0/5 (91 download)

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Book Synopsis Radio Propagation Measurements and Channel Modeling by : Theodore S. Rappaport

Download or read book Radio Propagation Measurements and Channel Modeling written by Theodore S. Rappaport and published by Cambridge University Press. This book was released on 2022-08-25 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete guide for creating accurate channel-propagation measurements and channel models at millimeter-wave and sub-terahertz bands. Including examples, this book provides practical guidance on RF propagation channels, including measurement system verification and an overview of current and future channel models for these frequencies.

Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology

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Publisher : Elsevier
ISBN 13 : 085709548X
Total Pages : 522 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology by : Christoph Hartnig

Download or read book Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology written by Christoph Hartnig and published by Elsevier. This book was released on 2012-02-20 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs) technology are promising forms of low-temperature electrochemical power conversion technologies that operate on hydrogen and methanol respectively. Featuring high electrical efficiency and low operational emissions, they have attracted intense worldwide commercialization research and development efforts. These R&D efforts include a major drive towards improving materials performance, fuel cell operation and durability. In situ characterization is essential to improving performance and extending operational lifetime through providing information necessary to understand how fuel cell materials perform under operational loads.Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology, Volume 2 details in situ characterization, including experimental and innovative techniques, used to understand fuel cell operational issues and materials performance. Part I reviews enhanced techniques for characterization of catalyst activities and processes, such as X-ray absorption and scattering, advanced microscopy and electrochemical mass spectrometry. Part II reviews characterization techniques for water and fuel management, including neutron radiography and tomography, magnetic resonance imaging and Raman spectroscopy. Finally, Part III focuses on locally resolved characterization methods, from transient techniques and electrochemical microscopy, to laser-optical methods and synchrotron radiography.With its international team of expert contributors, Polymer electrolyte membrane and direct methanol fuel cell technology will be an invaluable reference for low temperature fuel cell designers and manufacturers, as well as materials science and electrochemistry researchers and academics. Polymer electrolyte membrane and direct methanol fuel cell technology is an invaluable reference for low temperature fuel cell designers and manufacturers, as well as materials science and electrochemistry researchers and academics. - Details in situ characterisation of polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs), including the experimental and innovative techniques used to understand fuel cell operational issues and materials performance - Examines enhanced techniques for characterisation of catalyst activities and processes, such as X-ray absorption and scattering, advanced microscopy and electrochemical mass spectrometry - Reviews characterisation techniques for water and fuel management, including neutron radiography and tomography, and comprehensively covers locally resolved characterisation methods, from transient techniques to laser-optical methods

International Telecommunications Conference

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Publisher : Springer
ISBN 13 : 9811304084
Total Pages : 301 pages
Book Rating : 4.8/5 (113 download)

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Book Synopsis International Telecommunications Conference by : Ali Boyaci

Download or read book International Telecommunications Conference written by Ali Boyaci and published by Springer. This book was released on 2018-07-05 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects one of the global premier scientific gatherings on telecommunications, signal processing, data networks, security, and optimization. It presents the proceedings of the International Telecommunications Conference 2017 (ITelCon 2017), held in Istanbul, Turkey from December 28 to 29, 2017. The proceedings include state-of-the-art studies that highlight major advances in the field of telecommunications and related branches. In addition, some of the contributions form the basis for 5G and beyond studies and standardization processes. The ITelCon conference brings together industry and academia participants from around the globe and promotes research, development, and applications in the field of telecommunications. It includes a far-reaching program supported by a variety of technical tracks on research, development, technology, design, services, and applications. The primary audience of ITelCon includes academics, experts and professionals from industry, as well as researchers in the field of telecommunications and relevant subfields.

Scientific and Technical Aerospace Reports

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Publisher :
ISBN 13 :
Total Pages : 994 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Wireless Sensor and Actuator Networks

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Publisher : Academic Press
ISBN 13 : 0080558615
Total Pages : 391 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Wireless Sensor and Actuator Networks by : Roberto Verdone

Download or read book Wireless Sensor and Actuator Networks written by Roberto Verdone and published by Academic Press. This book was released on 2010-07-27 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: When choosing the technology options to develop a wireless sensor network (WSN), it is vital that their performance levels can be assessed for the type of application intended. This book describes the different technology options – MAC protocols, routing protocols, localisation and data fusion techniques – and provides the means to numerically measure their performance, whether by simulation, mathematical models or experimental test beds. Case studies, based on the authors' direct experience of implementing wireless sensor networks, describe the design methodology and the type of measurements used, together with samples of the performance measurements attained. Wireless Sensor and Actuator Networks will enable you to answer vital questions such as: - How long will my network remain alive given the amount of sensing required of it? - For how long should I set the sleeping state of my motes? - How many sensors should I distribute to meet the expected requirements of the application? - What type of throughput should I expect as a function of the number of nodes deployed and the radio interface chosen (whether it be Bluetooth or Zigbee)? - How is the Packet Error Rate of my Zigbee motes affected by the selection of adjacent frequency sub bands in the ISM 2.4GHz band? - How is the localisation precision dependant on the number of nodes deployed in a corridor? Communications and signal processing engineers, researchers and graduate students working in wireless sensor networks will find this book an invaluable practical guide to this important technology. "This book gives a proper balance between theory and application; it is a book for those R&D engineers that want to appreciate both why, how and in which domains Wireless Sensor Networks can be best applied." --Fabio Bellifemine, Telecom Italia "This book is a thorough and accessible exposition on wireless sensor networks with a good balance between theory and practice; it is valuable for both students and practicing engineers, and is an essential addition for engineering libraries." --Professor Moe Win, Associate Professor at the Laboratory for Information and Decision Systems (LIDS), Massachusetts Institute of Technology - Only book to examine wireless sensor network technologies and assess their performance capabilities against possible applications - Enables the engineer to choose the technology that will give the best performance for the intended application - Case studies, based on the authors' direct experience of implementing wireless sensor networks, describe the design methodology and the type of measurements used, together with samples of the performance measurements attained