Computational Electromagnetic Modeling For Wireless Channel Characterization
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Computational Electromagnetic Modeling For Wireless Channel Characterization
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Author : Chan-Ping Edwin Lim
language : en
Publisher:
Release Date : 2006
Computational Electromagnetic Modeling For Wireless Channel Characterization written by Chan-Ping Edwin Lim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with MIMO systems categories.
Abstract: A new full wave methodology and a well-established ray-tracing method are employed for indoor wireless communications channel modeling. The full-wave method, referred to as array decomposition-fast multipole method (AD-FMM) for indoor simulation, is based on the finite element-boundary integral formulation. A key feature of this technique is the use of domain decomposition methods to efficiently model repeatable components such as bricks, chairs, tables, etc. This leads to significant memory reduction allowing the simulation of realistic structures with different antenna locations to predict the statistical profiles of the received signal strength. These profiles are subsequently used to evaluate the bit error rate (BER) for specific digital modulation schemes. The method is also employed to predict the statistical channel capacity for multiple input multiple output (MIMO) systems via the complementary cumulative distribution function. This dissertation also exploits an established ray-tracing electromagnetic (EM) simulation tool, and measurements for indoor channel characterization for wireless applications. Specifically, measurements are conducted for indoor environments to validate the channel model obtained using ray tracing tools. Such ray-tracing channel models are appropriate for 4th generation 60~GHz communication systems.
Applied Computational Electromagnetics Society Journal Special Issue On Computational Electromagnetic Techniques In Mobile Wireless Communications Volume 15 Number 3 2000
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Author :
language : en
Publisher:
Release Date : 2000
Applied Computational Electromagnetics Society Journal Special Issue On Computational Electromagnetic Techniques In Mobile Wireless Communications Volume 15 Number 3 2000 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
TABLE OF CONTENTS: A Random Phase Assisted Ray Tracing Technique for Wireless Channel Modeling; Nanocells Intrasystem Interference Realistic Worst Case Analysis for Open Site Personnal Communication Scenarios; Designing Embedded Antennas for Bluetooth Protocol; Analysis and Design of Tapered Meander Line Antennas for Mobile Communications; A Cole-Cole Diagram Representation of Micro strip Structure; Enhancement of Numerical Computation Methods Useful for Radio Communication Antenna Systems; Time and Frequency Domain Wave Propagators; Ray Tracing Techniques for Mobile Communications; On the Feasibility of the Multipath Fingerprint Method for Location Finding in Urban Environments; and New Designs for Dual Band Antennas for Satellite Mobile Communications Handsets.
Time Domain Electromagnetic Modeling Of Uwb Indoor Wireless Channels And Systems
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Author : Abbas Alighanbari
language : en
Publisher:
Release Date : 2008
Time Domain Electromagnetic Modeling Of Uwb Indoor Wireless Channels And Systems written by Abbas Alighanbari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Parts of the present thesis are dedicated to new developments in the Scaling function based Multiresolution Time Domain (S-MRTD) techniques. However, a larger research effort of the thesis is focused on efficient full-wave modeling of indoor wireless channels and systems. Through this, the potential of S-MRTD as a computational tool for the solution of various indoor wireless problems is illustrated. It is also shown that the S-MRTD method is well-suited to parallel implementation. Despite the use of high-order finite differences and the associated increase in inter-processor communication, excellent parallelization efficiencies are achieved on a Linux cluster. As a result, the objective of formulating a full-wave tool, allowing for site-specific channel modeling, becomes feasible. Researching S-MRTD as a numerical technique, contributions are made in relation with the dispersion properties of Coifman scaling functions, optimal truncation of finite-difference operators, and the treatment of hard boundary conditions. In addition, a new high-order time-sampling S-MRTD technique is presented that overcomes the numerical stability limitations of previous S-MRTD schemes and highly accelerates the speed of the field updating procedure. Applying S-MRTD to indoor wireless problems, it is shown that a scheme that is formulated with the Deslauriers-Dubuc biorthogonal functions offers an efficient and accurate alternative to the conventional Finite Difference Time Domain (FDTD) for the characterization of indoor wireless channels. The relationship between the field analysis of wireless channels and their system-level descriptions is investigated. It is shown that a knowledge of the channel impulse responses, computed with S-MRTD simulations, enables physics-based system-level performance evaluation, optimization and compatibility studies of ultra-wideband communication systems. Moreover, the limitations of two-dimensional solvers are systematically investigated through comparisons with their three-dimensional counterparts.
Adaptive Mesh Refinement In Time Domain Numerical Electromagnetics
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Author : Costas Sarris
language : en
Publisher: Springer Nature
Release Date : 2022-05-31
Adaptive Mesh Refinement In Time Domain Numerical Electromagnetics written by Costas Sarris and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-31 with Technology & Engineering categories.
This monograph is a comprehensive presentation of state-of-the-art methodologies that can dramatically enhance the efficiency of the finite-difference time-domain (FDTD) technique, the most popular electromagnetic field solver of the time-domain form of Maxwell's equations. These methodologies are aimed at optimally tailoring the computational resources needed for the wideband simulation of microwave and optical structures to their geometry, as well as the nature of the field solutions they support. That is achieved by the development of robust “adaptive meshing” approaches, which amount to varying the total number of unknown field quantities in the course of the simulation to adapt to temporally or spatially localized field features. While mesh adaptation is an extremely desirable FDTD feature, known to reduce simulation times by orders of magnitude, it is not always robust. The specific techniques presented in this book are characterized by stability and robustness. Therefore, they are excellent computer analysis and design (CAD) tools. The book starts by introducing the FDTD technique, along with challenges related to its application to the analysis of real-life microwave and optical structures. It then proceeds to developing an adaptive mesh refinement method based on the use of multiresolution analysis and, more specifically, the Haar wavelet basis. Furthermore, a new method to embed a moving adaptive mesh in FDTD, the dynamically adaptive mesh refinement (AMR) FDTD technique, is introduced and explained in detail. To highlight the properties of the theoretical tools developed in the text, a number of applications are presented, including: Microwave integrated circuits (microstrip filters, couplers, spiral inductors, cavities). Optical power splitters, Y-junctions, and couplers Optical ring resonators Nonlinear optical waveguides. Building on first principles of time-domain electromagnetic simulations, this book presents advanced concepts and cutting-edge modeling techniques in an intuitive way for programmers, engineers, and graduate students. It is designed to provide a solid reference for highly efficient time-domain solvers, employed in a wide range of exciting applications in microwave/millimeter-wave and optical engineering.
Advanced Electromagnetic Models For Materials Characterization And Nondestructive Evaluation
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Author : Harold A Sabbagh
language : en
Publisher: Springer Nature
Release Date : 2021-04-20
Advanced Electromagnetic Models For Materials Characterization And Nondestructive Evaluation written by Harold A Sabbagh and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-20 with Science categories.
This book expands on the subject matter of ’Computational Electromagnetics and Model-Based Inversion: A Modern Paradigm for Eddy-Current Nondestructive Evaluation.’ It includes (a) voxel-based inversion methods, which are generalizations of model-based algorithms; (b) a complete electromagnetic model of advanced composites (and other novel exotic materials), stressing the highly anisotropic nature of these materials, as well as giving a number of applications to nondestructive evaluation; and (c) an up-to-date discussion of stochastic integral equations and propagation-of-uncertainty models in nondestructive evaluation. As such, the book combines research started twenty-five years ago in advanced composites and voxel-based algorithms, but published in scattered journal articles, as well as recent research in stochastic integral equations. All of these areas are of considerable interest to the aerospace, nuclear power, civil infrastructure, materials characterization and biomedical industries. The book covers the topic of computational electromagnetics in eddy-current nondestructive evaluation (NDE) by emphasizing three distinct topics: (a) fundamental mathematical principles of volume-integral equations as a subset of computational electromagnetics, (b) mathematical algorithms applied to signal-processing and inverse scattering problems, and (c) applications of these two topics to problems in which real and model data are used. It is therefore more than an academic exercise and is valuable to users of eddy-current NDE technology in industries as varied as nuclear power, aerospace, materials characterization and biomedical imaging.
Computational Methods In Electromagnetic Compatibility
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Author : Dragan Poljak
language : en
Publisher: John Wiley & Sons
Release Date : 2018-04-24
Computational Methods In Electromagnetic Compatibility written by Dragan Poljak and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-24 with Science categories.
Offers a comprehensive overview of the recent advances in the area of computational electromagnetics Computational Method in Electromagnetic Compatibility offers a review of the most recent advances in computational electromagnetics. The authors—noted experts in the field—examine similar problems by taking different approaches related to antenna theory models and transmission line methods. They discuss various solution methods related to boundary integral equation techniques and finite difference techniques. The topics covered are related to realistic antenna systems including antennas for air traffic control or ground penetrating radar antennas; grounding systems (such as grounding systems for wind turbines); biomedical applications of electromagnetic fields (such as transcranial magnetic stimulation); and much more. The text features a number of illustrative computational examples and a reference list at the end of each chapter. The book is grounded in a rigorous theoretical approach and offers mathematical details of the formulations and solution methods. This important text: Provides a trade-off between a highly efficient transmission line approach and antenna theory models providing analysis of high frequency and transient phenomena Contains the newest information on EMC analysis and design principles Discusses electromagnetic field coupling to thin wire configurations and modeling in bioelectromagnetics Written for engineering students, senior researchers and practicing electrical engineers, Computational Method in Electromagnetic Compatibility provides a valuable resource in the design of equipment working in a common electromagnetic environment.
Propagation Channel Characterization Parameter Estimation And Modeling For Wireless Communications
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Author : Xuefeng Yin
language : en
Publisher: John Wiley & Sons
Release Date : 2016-09-13
Propagation Channel Characterization Parameter Estimation And Modeling For Wireless Communications written by Xuefeng Yin and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-13 with Technology & Engineering categories.
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
Computational Methods In Electromagnetic Compatibility
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Author : Dragan Poljak
language : en
Publisher: John Wiley & Sons
Release Date : 2018-05-10
Computational Methods In Electromagnetic Compatibility written by Dragan Poljak and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-10 with Science categories.
Offers a comprehensive overview of the recent advances in the area of computational electromagnetics Computational Method in Electromagnetic Compatibility offers a review of the most recent advances in computational electromagnetics. The authors—noted experts in the field—examine similar problems by taking different approaches related to antenna theory models and transmission line methods. They discuss various solution methods related to boundary integral equation techniques and finite difference techniques. The topics covered are related to realistic antenna systems including antennas for air traffic control or ground penetrating radar antennas; grounding systems (such as grounding systems for wind turbines); biomedical applications of electromagnetic fields (such as transcranial magnetic stimulation); and much more. The text features a number of illustrative computational examples and a reference list at the end of each chapter. The book is grounded in a rigorous theoretical approach and offers mathematical details of the formulations and solution methods. This important text: Provides a trade-off between a highly efficient transmission line approach and antenna theory models providing analysis of high frequency and transient phenomena Contains the newest information on EMC analysis and design principles Discusses electromagnetic field coupling to thin wire configurations and modeling in bioelectromagnetics Written for engineering students, senior researchers and practicing electrical engineers, Computational Method in Electromagnetic Compatibility provides a valuable resource in the design of equipment working in a common electromagnetic environment.
Advanced Modeling In Computational Electromagnetic Compatibility
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Author : Dragan Poljak
language : en
Publisher: John Wiley & Sons
Release Date : 2007-02-26
Advanced Modeling In Computational Electromagnetic Compatibility written by Dragan Poljak and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-02-26 with Science categories.
This text combines the fundamentals of electromagnetics with numerical modeling to tackle a broad range of current electromagnetic compatibility (EMC) problems, including problems with lightning, transmission lines, and grounding systems. It sets forth a solid foundation in the basics before advancing to specialized topics, and allows readers to develop their own EMC computational models for applications in both research and industry.
Advanced Computational Electromagnetic Methods
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Author : Wenhua Yu
language : en
Publisher: Artech House
Release Date : 2015-03-01
Advanced Computational Electromagnetic Methods written by Wenhua Yu and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-03-01 with Technology & Engineering categories.
This new resource covers the latest developments in computational electromagnetic methods, with emphasis on cutting-edge applications. This book is designed to extend existing literature to the latest development in computational electromagnetic methods, which are of interest to readers in both academic and industrial areas. The topics include advanced techniques in MoM, FEM and FDTD, spectral domain method, GPU and Phi hardware acceleration, metamaterials, frequency and time domain integral equations, and statistics methods in bio-electromagnetics.