Download or read book High Resolution RADAR Imaging Via a Portable Through wall MIMO System Employing a Low profile UWB Array written by Kenneth Edward Browne and published by . This book was released on 2011 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally, a variety of images based upon simulated (via a high frequency scattering code) and experimental (via the proposed snapshot imaging radar) backscatter are presented to demonstrate the efficacy of these approaches. More precisely, several free-space and through-wall (cinderblock) scenes are utilized which encompass complex scattering environments containing metal spheres, trihedrals, plates, cylinders, and a variety of extraneous scatterers.

Download or read book Millimeter wave Imaging Using MIMO SAR Techniques written by Muhammet Yanik and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a strong desire to exploit the non-ionizing millimeter-wave (mmWave) spectrum (from 30 GHz to 300 GHz) in many high-resolution imaging applications ranging from medical to security. The primary challenge of a cost-effective and low-complexity mmWave imaging system is to achieve high-resolution with as few antenna elements as possible. Multiple input multiple-output (MIMO) radars using the simultaneous operation of spatially diverse transmit and receive antennas are good candidates to meet this challenge. On the other hand, higher integration complexity of extremely dense transceiver electronics limits the use of MIMO-only solutions within a relatively large imaging aperture. Hybrid concepts combining synthetic aperture radar (SAR) techniques and MIMO arrays present a great compromise to achieve short data acquisition time and low-complexity. Despite numerous studies that apply MIMO concepts to SAR techniques, the design process of a MIMO-SAR system is non-trivial, especially for mmWave imaging. Many issues have to be carefully addressed. Besides, compared with conventional monostatic sampling schemes, where the measurements are taken by collocated transmit and receive antennas, or MIMO-only solutions, efficient image reconstruction methods for MIMO-SAR topologies are more complicated in short-range applications. This dissertation introduces a complete mmWave imaging solution combining wideband MIMO arrays with SAR techniques, along with computationally efficient novel image reconstruction algorithms optimized for MIMO-SAR configurations. We present highly-integrated and reconfigurable MIMO-SAR testbeds utilizing commercially available complementary metal-oxide semiconductor (CMOS) based system-on-chip wideband MIMO mmWave sensors and motorized rail platforms. Several aspects of the MIMO-SAR testbed design process, including MIMO array calibration, electrical/mechanical synchronization, system-level verification, and performance evaluation, are described. The proposed algorithms are verified by both simulation and processing real data collected with custom-built imaging testbeds. The results confirm that our complete solution presents a strong potential in high-resolution imaging tasks of various real-world applications.

Download or read book Mimo Radar Through the Wall Imaging Techniques written by Evan Gebhardt and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a compelling need to both detect and localize targets through barriers. The ability to do this is advantageous for police, military, and search and rescue teams. Radar systems are capable of processing returns from targets through barriers where optical and thermal systems can fail. This thesis describes techniques for detecting and localizing targets through barriers. There is also a desire to minimize the size and complexity of the radar systems. This is because these radar systems are usually operated in hostile and harsh conditions. This need to reduce size and complexity leads to difficulties in localization and detection because cross range resolution can be a function of both aperture size and number of elements. These pitfalls can be overcome by well thought out imaging scenarios and signal processing techniques. By utilizing multiple views via a multiple-input-multiple-output (MIMO) radar configuration, data can be fused to create a clearer image about what is going on behind the barrier. This thesis addresses this technique as well as different mitigation techniques, such as a singular value decomposition of wavelet transform method to improve localization and detection of targets. A stepped frequency radar system was also utilized to detect moving targets through walls using Doppler shifts. Together, these techniques demonstrate methods that show a reduction in size and complexity of traditional through-wall radar systems while still providing accurate detection and localization.

Download or read book Through Wall Imaging with Uwb Radar System written by Michal Aftanas and published by LAP Lambert Academic Publishing. This book was released on 2010-08 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through-wall imaging is new, but very promising field for rescue and security applications. Information about current state inside the building in hazardous environment could save many human lives. In order to obtain more precise information about the indoor environment, several improvements in signal processing techniques are required. It was shown how to improve the results of through-wall imaging and still preserve realtime processing that can be used in praxis. Even if similar approaches lead mostly to highly theoretical methods that can be barely implemented in praxis, we were concentrated on developing of methods, that we have already implemented for practical scenarios and tested by real measurements. All the signal processing steps including calibration, preprocessing, migration, and image representation as well as the radar hardware itself have great abilities for future improvements. It can be expected that more sophisticated methods with much larger computational requirements would be investigated in the future. They will require more powerful hardware that is available now. However, keep in mind that the future is closer than you think.

Download or read book W Band FMCW MIMO Radar Demonstrator System for 3D Imaging written by Daniela Karina Bleh and published by Fraunhofer Verlag. This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most dangerous situations when flying a helicopter is landing over dry sand or powder snow. The rotors swirl particles creating a dense cloud. With optical methods navigating through this cloud is impossible but for millimetre waves it becomes almost transparent. As a consequence millimetre waves are an outstanding choice for the development of imaging systems that can be used as a landing aid. The aim of this work is the 3D imaging of static scenes with a large field of view, good resolution and high dynamics. In this thesis a demonstrator system is presented, which is based on the MIMO principle and works with FMCW radar modules in the millimetre wavelength range. The set-up of the demonstrator system is explained and the hardware components are described. An algorithm for image reconstruction is presented as well as a calibration routine. An optimized antenne aperture is determined that enables unambiguous imaging of the half-space in front of the aperture with good resolution and low side lobes. Various measurements illustrate three-dimensional imaging capabilities and show long-range operation. In addition, the data acquisition rate is determined.

Download or read book EM Modeling of UWB Through wall Radar Imaging Using the High frequency Geometrical Optics GO written by Seng-Lee Foo and published by Defence R&D Canada - Ottawa. This book was released on 2002 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Massive MIMO Performance Analysis and Radar Sensor Networks Based Target Detection written by Ganlin Zhao and published by . This book was released on 2017 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, we apply massive multiple-input-multiple-output (MIMO) performance analysis and radar target detection based on radar sensor networks(RSN). In recent years, massive MIMO draws great interest for wireless communication researchers. As a highly scalable technology for 5G networks, massive MIMO will meet the increasing demand for wireless throughput. Also, radar target detection is also an important topic for military and civilian applications. Improving detection accuracy when target is embedded in strong background clutter is a challenging task. In Chapter 2, we investigate scaling law of theoretical transmission capacity limit in an uplink multi-user MIMO system. In 5G network base station densification and massive MIMO are both important techlogogies which explore the spatial reuse and diversity to increase the total network spectrum efficiency. We apply scaling law to conduct the asymptotic analysis on how the outage capacity scales with number of users, base stations and base station antennas. In Chapter 3, we investigate shadow fading impact on a multi-user massive MIMO system. By deploying a large antenna array on the base station, the random channel vectors between users and base station antennas become pairwise orthogonal. This important property of massive MIMO makes small scale fading effect asymptotically vanish while large scale fading still remains. Based on this fact, we analyze the uplink achievable rate and cell coverage area under outage constraint considering log-normal shadow fading effect for both single-cell and multi-cell scenarios. In Chapter 4, we propose an Empirical Mode Decomposition (EMD) based approach to Ultra Wide Band (UWB) radar for sense-through-foliage target detection. When the radar signal quality is good, the EMD based target detection approach performs well by comparing to the no target case. When the radar signal quality is poor and a single radar echo fails to detect the target, we firstly apply RSN and Rake structure to combine radar echoes from different radar cluster-members and then the EMD based method could successfully carry out the target detection. In Chapter 5, we propose a target detection and classification approach using Hidden Markov Models (HMMs). Hidden Markov Model is used as an classifier to distinguish between the presence of target in a background clutter and the pure clutter response. Sense-through-foliage target detection and Sense-through-Wall human detection are conducted using real world Ultra Wide Band (UWB) data. Experiment results show HMM based method provides good detection and false alarm rate for poor quality radar echoes in position 1 in the sense-through-foliage target detection scenario. Sense-through-wall human experiment results shows Hidden Markov Model based method could successfully detect stationary human target behind different types of walls.

Download or read book Radar Imaging Using Electrically Large Arrays with High Range Resolution at 160 GHz written by André Dürr and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ubiquitous Multi input Multi output Multifunction Digital Array Radar written by Daniel J. Rabideau and published by . This book was released on 2004 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Antenna Engineering Handbook written by John Volakis and published by McGraw Hill Professional. This book was released on 2018-11-05 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gold-standard reference on the design and application of classic and modern antennas—fully updated to reflect the latest advances and technologiesThis new edition of the “bible of antenna engineering” has been updated to provide start-to-finish coverage of the latest innovations in antenna design and application. You will find in-depth discussion of antennas used in modern communication systems, mobile and personal wireless technologies, satellites, radar deployments, flexible electronics, and other emerging technologies, including 5G, terahertz, and wearable electronics. Antenna Engineering Handbook, Fifth Edition, is bolstered by real-world examples, hundreds of illustrations, and an emphasis on the practical aspects of antennas.Featuring 60 chapters and contributions from more than 80 renowned experts, this acclaimed resource is edited by one of the world’s leading antenna authorities. This edition features all of the classic antenna types, plus new and emerging designs, with 13 all-new chapters and important updates to nearly all chapters from past editions.Antenna Engineering Handbook, Fifth Edition, clearly explains cutting-edge applications in WLANs, automotive systems, PDAs, and handheld devices, making it an indispensable companion for today’s antenna practitioners and developers.Coverage includes:•Antenna basics and classic antennas•Design approaches for antennas and arrays•Wideband and multiband antennas•Antennas for mobile devices and PDAs, automotive applications, and aircraft•Base station and smart antennas•Beamforming and 5G antennas•Millimeter-wave and terahertz antennas•Flexible, wearable, thin film, origami, dielectric, and on-chip antennas•MIMO antennas and phased arrays•Direction-finding and GPS antennas•Active antennas•Low-profile wideband antennas•Nanoantennas•Reflectors and other satellite and radio-telescope antennas•Low-frequency, HF, VHF, UHF, ECM, and ESM antennas•Impedance-matching techniques and material characteristics•Metastructured and frequency selective surfaces•Propagation and guided structures•Computational techniques and toolsets•Indoor and outdoor measurements

Download or read book Fundamentals of Radar Imaging written by Margaret Cheney and published by SIAM. This book was released on 2009-10-08 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides mathematicians with the background they need to work in radar imaging. The focus is on showing the connection between the physics and the mathematics and on supplying an intuitive mathematical understanding of basic concepts. This book will be useful to graduate students and applied mathematicians working in radar imaging.

Download or read book MATLAB Simulations for Radar Systems Design written by Bassem R. Mahafza and published by CRC Press. This book was released on 2003-12-17 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simulation is integral to the successful design of modern radar systems, and there is arguably no better software for this purpose than MATLAB. But software and the ability to use it does not guarantee success. One must also: Understand radar operations and design philosophy Know how to select the radar parameters to meet the design req

Download or read book Ultra Wideband Antennas and Propagation written by Ben Allen and published by John Wiley & Sons. This book was released on 2006-11-02 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing up-to-date material for UWB antennas and propagation as used in a wide variety of applications, "Ultra-wideband Antennas and Propagation for Communications, Radar and Imaging" includes fundamental theory, practical design information and extensive discussion of UWB applications from biomedical imaging, through to radar and wireless communications. An in-depth treatment of ultra-wideband signals in practical environments is given, including interference, coexistence and diversity considerations. The text includes antennas and propagation in biological media in addition to more conventional environments. The topics covered are approached with the aim of helping practising engineers to view the subject from a different angle, and to consider items as variables that were treated as constants in narrowband and wideband systems. Features tables of propagation data, photographs of antenna systems and graphs of results (e.g. radiation patterns, propagation characteristics) Covers the fundamentals of antennas and propagation, as well as offering an in-depth treatment of antenna elements and arrays for UWB systems, and UWB propagation models Provides a description of the underlying concepts for the design of antennas and arrays for conventional as well as ultra-wideband systems Draws together UWB theory by using case-studies to show applications of antennas and propagation in communication, radar and imaging systems The book highlights the unique design issues of using ultra-wideband and will serve both as an introductory text and a reference guide for designers and students alike.

Download or read book Mammography and Beyond written by National Research Council and published by National Academies Press. This book was released on 2001-06-04 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray mammography screening is the current mainstay for early breast cancer detection. It has been proven to detect breast cancer at an earlier stage and to reduce the number of women dying from the disease. However, it has a number of limitations. These current limitations in early breast cancer detection technology are driving a surge of new technological developments, from modifications of x-ray mammography such as computer programs that can indicate suspicious areas, to newer methods of detection such as magnetic resonance imaging (MRI) or biochemical tests on breast fluids. To explore the merits and drawbacks of these new breast cancer detection techniques, the Institute of Medicine of the National Academy of Sciences convened a committee of experts. During its year of operation, the committee examined the peer-reviewed literature, consulted with other experts in the field, and held two public workshops. In addition to identifying promising new technologies for early detection, the committee explored potential barriers that might prevent the development of new detection methods and their common usage. Such barriers could include lack of funding from agencies that support research and lack of investment in the commercial sector; complicated, inconsistent, or unpredictable federal regulations; inadequate insurance reimbursement; and limited access to or unacceptability of breast cancer detection technology for women and their doctors. Based on the findings of their study, the committee prepared a report entitled Mammography and Beyond: Developing Technology for Early Detection of Breast Cancer, which was published in the spring of 2001. This is a non-technical summary of that report.

Download or read book Millimeter Wave Antennas Configurations and Applications written by Jaco du Preez and published by Springer. This book was released on 2016-06-20 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively reviews the state of the art in millimeter-wave antennas, traces important recent developments and provides information on a wide range of antenna configurations and applications. While fundamental theoretical aspects are discussed whenever necessary, the book primarily focuses on design principles and concepts, manufacture, measurement techniques, and practical results. Each of the various antenna types scalable to millimeter-wave dimensions is considered individually, with coverage of leaky-wave and surface-wave antennas, printed antennas, integrated antennas, and reflector and lens systems. The final two chapters address the subject from a systems perspective, providing an overview of supporting circuitry and examining in detail diverse millimeter-wave applications, including high-speed wireless communications, radio astronomy, and radar. The vast amount of information now available on millimeter-wave systems can be daunting for researchers and designers entering the field. This book offers readers essential guidance, helping them to gain a thorough understanding based on the most recent research findings and serving as a sound basis for informed decision-making.

Download or read book Multifunctional Ultrawideband Antennas written by Chinmoy Saha and published by CRC Press. This book was released on 2019-03-19 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multifunctional Antennas (MFA) are comparatively a new area for antenna research and finds applications in various modern wireless radios, like Cognitive Radio (CR) in Software Defined Radio (SDR) technology and MIMO technology. This book is first attempt and an invaluable resource which deals with the design and realization of various kinds of multifunctional antennas. After clearly explaining the exclusive features of MFAs, the book presents various designs of such antennas considering versatile modern and upcoming applications. Written by three internationally known researchers, Multi-Functional Ultra Wideband Antennas: Trends, Techniques and Applications: Provides a lucid introduction on UWB systems, historical perspective and discusses various applications of such systems Discusses fundamentals of antennas and its characterization in time and frequency domains, primarily aimed for the beginners in the area Revisits the design and realization of various classical UWB antennas Discusses various techniques of designing frequency-notched UWB antennas and provide detailed comparison of the techniques Deals with the techniques of deriving multiple antenna functionalities from a single antenna Incorporates exclusive discussions on modern reconfigurable antennas and printed and dielectric resonator based MIMO antennas with clear focus on recent and upcoming technological requirements With Multi-Functional Ultra Wideband Antennas: Trends, Techniques and Applications, antenna engineers, communication system engineers, graduate students, academic/industry researchers will gain a thorough knowledge on design of such antennas with clear physical insight and understanding. Chinmoy Saha, PHD, is an associate Professor in the Department of Avionics at Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, India. His current research interest includes Microwave Circuits, Engineered Materials, Metamaterial Inspired Antennas and Circuits, reconfigurable and multi-functional antennas for modern wireless applications, Dielectric Resonator antennas, THz antennas and wireless power transfer. He is the author or coauthor of several books, scientific journals and recipient of several prestigious awards. Jawad Yaseen Siddiqui, PHD, is an associate Professor in the Department of Radio Physics and Electronics at University of Calcutta, Kolkata, India. His current research interest includes ultra-wideband antennas, frequency reconfigurable antennas, tapered slot antennas and multi-functional antennas for cognitive radio application. He is the author or coauthor of several books, scientific journals and recipient of prestigious awards. He is a Co-Principal Investigator on Stratosphere Troposphere (ST) Radar Project at the University of Calcutta, Kolkata, India. Yahia M.M. Antar, PHD, is a Professor in the Department of Department of Electrical and Computer Engineering at the Royal Military College of Canada, Kingston, ON, Canada. He is the author or coauthor of several books, scientific journals and recipient of prestigious awards which includes IEEE-Antennas and Propagation Society prestigious Chen-To-Tai Distinguished Educator Award for 2017, 2015 IEEE Canada J. M. Ham outstanding Engineering Education Award, 2014 IEEE Canada RA Fessenden Silver Medal, 2012 Queen’s Diamond Jubilee Medal from the Governor General of Canada and many more.

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: A comprehensive summary of the state of the art in Ultra Wideband system engineering, from components to system engineering aspects.