Download or read book Radar Signature Analysis of Indoor Clutter and Stationary Human Target Classification written by Travis Bufler and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Research in through-the-wall radar (TTWR) is a recent area of focus and as such many challenges have arisen related to target detection, location, and tracking. These types of radar systems are often plagued by harsh clutter scenarios caused by the variety and abundance of furniture elements within the antenna's field-of-view which in turn degrade the radars ability to accurately detect targets. Furthermore, once an object is located, having the ability to identify the object under consideration is still an on ongoing research problem. This dissertation has two main focuses. The first analyzes and investigates the spectral signatures of indoor clutter elements through their radar cross section (RCS). The characterization of the wideband spectral properties for indoor clutter elements is accomplished using finite difference time domain (FDTD) techniques. Using FDTD, the spectral characteristics of clutter elements were obtained over a wide range of frequencies and aspect angles at different transmit-receive polarization combinations. The spectral properties are then compared and contrasted between the different objects as well as human biological models for analysis and use in TTWR. The RCS results obtained from the simulations are then compared to experimental data collected using a wideband network analyzer. The second main topic is the use of machine learning algorithms, specifically Support Vector Machines (SVMs) to construct models from the previously acquired spectral signatures to aid in target classification. Utilizing variables of frequency and polarization, a SVM classifier can be constructed to classify unknown targets as either human or clutter object. Additionally, the application of feature selection algorithms are applied to the spectral characteristics to reduce the model complexity and determine the SVM classification accuracy of a reduced dataset. Finally, the classification performance is assessed in the presence of additive white Gaussian noise (AWGN) and through various wall materials.
Download or read book Radar for Indoor Monitoring written by Moeness Amin and published by CRC Press. This book was released on 2017-09-14 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to capture recent advances and breakthroughs in in-home radar monitoring of human motions and activities. It addresses three key attributes of radar for in-door human monitoring, namely: motion classification including fall, detection of vital signs, and categorization of human gait for risk assessment and progression of physical impairments and disabilities. It explores recent developments in radar technology for human monitoring inside homes and residences. The reader will learn enhanced detection and classification techniques of radar signals associated with human micro- and macro-motions. Furthermore, the book includes examples using real data collected from healthy individuals, patients, and retirement communities based on the subject Doppler and range information, and using different single and multi-antenna radar system configurations. Results are also presented using modeled data based on biomechanics and kinematics. Indoor monitoring is further demonstrated using alternative technologies of infrared sensors and RF signals of opportunities.
Download or read book Optimal Spectrum Filtering for the Radar Detection of Targets in Clutter written by John K. Schindler and published by . This book was released on 1969 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel radar technique is proposed for detecting the presence of a target having a priori known frequency-dependent scattering properties. The target coexists with a large collection of clutter elements having random scattering properties and ranges. Assuming a wideband random signal excitation, the power spectrum of the scattered field consists of the target return having an a priori known frequency behavior embedded in a clutter return having a random frequency dependence. On an ensemble average basis, the clutter appears as additive noise from which the existence of a prescribed target return must be extracted.
Download or read book Target Classification by Time Domain Analysis of Radar Signatures written by Delbert G. Kulchak (MAJ, USAF.) and published by . This book was released on 1977 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Micro Doppler Signatures written by Victor C. Chen and published by IET. This book was released on 2014-05-30 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing interest in how to use radar micro-Doppler signatures in real world applications. This book introduces basic concepts, principles, and theoretical analysis on the micro-Doppler effect in radar and pulls together the latest research on the processing and application of radar micro-Doppler signatures. Its goal is to provide readers with a working knowledge on various applications of radar micro-Doppler signatures. It reviews the current progress, challenges, and perspectives on radar micro-Doppler research and introduces research on bi-static/multi-static micro-Doppler signatures, decomposition of micro-Doppler signatures, through-wall radar micro-Doppler signatures and ultrasound micro-Doppler signature studies. Most chapters deal with applications of radar micro-Doppler signatures, including detection, tracking and discrimination of vehicles and dismounts, identifying human movement based on radar micro-Doppler signatures, detection and tracking small boats in the sea, detection and discrimination complex motion of missile warheads, discrimination of animals and the detection and tracking of birds. Supplementary material can be found at the IET's ebook page
Download or read book Through the Wall Radar Imaging written by Moeness G. Amin and published by CRC Press. This book was released on 2017-12-19 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through-the-wall radar imaging (TWRI) allows police, fire and rescue personnel, first responders, and defense forces to detect, identify, classify, and track the whereabouts of humans and moving objects. Electromagnetic waves are considered the most effective at achieving this objective, yet advances in this multi-faceted and multi-disciplinary technology require taking phenomenological issues into consideration and must be based on a solid understanding of the intricacies of EM wave interactions with interior and exterior objects and structures. Providing a broad overview of the myriad factors involved, namely size, weight, mobility, acquisition time, aperture distribution, power, bandwidth, standoff distance, and, most importantly, reliable performance and delivery of accurate information, Through-the-Wall Radar Imaging examines this technology from the algorithmic, modeling, experimentation, and system design perspectives. It begins with coverage of the electromagnetic properties of walls and building materials, and discusses techniques in the design of antenna elements and array configurations, beamforming concepts and issues, and the use of antenna array with collocated and distributed apertures. Detailed chapters discuss several suitable waveforms inverse scattering approaches and revolve around the relevance of physical-based model approaches in TWRI along with theoretical and experimental research in 3D building tomography using microwave remote sensing, high-frequency asymptotic modeling methods, synthetic aperture radar (SAR) techniques, impulse radars, airborne radar imaging of multi-floor buildings strategies for target detection, and detection of concealed targets. The book concludes with a discussion of how the Doppler principle can be used to measure motion at a very fine level of detail. The book provides a deep understanding of the challenges of TWRI, stressing its multidisciplinary and phenomenological nature. The breadth and depth of topics covered presents a highly detailed treatment of this potentially life-saving technology.
Download or read book High Resolution Radar Clutter Analysis and Modeling for Advanced Target Detection Strategies written by and published by . This book was released on 2007 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report results from a contract tasking University of Pisa as follows: The research is divided in two phases. In the first phase, we consider modeling and estimating the characteristic parameters of high resolution non-Gaussian sea clutter. We will investigate specifically nonstationarity and possible non-Gaussianity of the clutter on long period of time, by applying nonhomogeneity tests and spectral analysis to highlight the temporal changes of the clutter process. The analyses of high resolution clutter will be performed by processing complex clutter data collected in November 1993 and in winter 1998 with the high resolution IPIX radar, provided by McMaster University, at a range resolution of 60 m, 30 m, 15 m, 9 m, and 3 m, in like- (HH-VV) and crosspolarizations (HV-VH) An accurate characterization of the high resolution radar clutter allows a more adequate design of the radar detector of targets. This detector needs to be adaptive to the data and should have the ability to comply with the non-homogeneous nature of the clutter interference. This aspect of the problem will be discussed in the second phase of this study. A detailed analysis of the impact of the nonstationarity of the clutter will be performed first analytically (where possible) and by means of simulations; then we will use the real recorded data to feed adaptive detectors, designed for stationary Gaussian and non-Gaussian clutter, and we will compare theoretical and simulated performance with real data performance.
Download or read book Radar Signature Analysis Based on Measured Differential Phase Shifts of Target Scattering at Two Harmonic Frequencies written by W. B Goggins (Jr) and published by . This book was released on 1967 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The identification and classification of radar targets is facilitated by a newly developed technique based on measurements of the differential phase shift of the target scattering obtained at two harmonic phase-locked frequencies. These phase differences are independent of target range and relative motion. The differential phase shift between two harmonic frequencies has been measured for various types of targets. The experimental results indicate that the differential phase shift can be used as a parameter in the classification or identification of targets. (Author).
Download or read book Target Classification by Time Domain Analysis of Radar Signatures written by Delbert Glenn Kulchak and published by . This book was released on 1977 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this investigation is to examine a time domain pattern recognition algorithm which will identify targets by analysis of their radar signatures. The essence of the algorithm is a conversion of an analog waveform to a binary sequence, from which binary words are selected as attributes. The selection of attributes is a heuristic, nonexhaustive process, and each target is eventually described in a statistical sense by the frequency of occurrence of the binary attributes. A relationship between this Frequency of Occurrence of Binary Words method and the Fourier transform is also known. (Author).
Download or read book Radar Signature Investigation written by D. O. Cisco and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Detection and Identification of Human Signatures Using Moving Platforms written by Sevgi Zübeyde Gürbüz and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar offers unique advantages over other sensors for the detection of humans, such as remote operation during virtually all weather and lighting conditions, increased range, and better coverage. Many current radar-based human detection systems employ some type of Fourier analysis, such as Doppler processing. However, in many environments, the signal-to-noise ratio (SNR) of human returns is quite low. Furthermore, Fourier-based techniques assume a linear variation in target phase over the aperture, whereas human targets have a highly nonlinear phase history. The resulting phase mismatch causes significant SNR loss in the detector itself. In this work, human target modeling is used to derive a more accurate non-linear approximation to the true target phase history. Two algorithms are proposed: a parameter estimation-based optimized non-linear phase (ONLP) detector, and a dictionary search-based enhanced optimized non-linear phase (EnONLP) detector. The ONLP algorithm optimizes the likelihood ratio over the unknown model parameters to derive a more accurate approximation to the expected human return. The EnONLP algorithm stores expected target signatures generated for each possible combination of model parameters in a dictionary, and then applies Orthogonal Matching Pursuit (OMP) to determine the optimal linear combination of dictionary entries that comprises the measured radar data. Thus, unlike the ONLP, the EnONLP algorithm also has the capability of detecting the presence of multiple human targets. Cramer-Rao bounds (CRB) on parameter estimates and receiver operating characteristics (ROC) curves are used to validate analytically the performance of both proposed methods to that of conventional, fully adaptive STAP. Finally, application of EnONLP to target characterization is illustrated.
Download or read book Advanced Ultrawideband Radar written by James D. Taylor and published by CRC Press. This book was released on 2016-12-19 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest theory, developments, and applications related to high resolution materials-penetrating sensor systems. An international team of expert researchers explains the problems and solutions for developing new techniques and applications. Subject areas include ultrawideband (UWB) signals propagation and scattering, materials-penetrating radar techniques for small object detection and imaging, biolocation using holographic techniques, tomography, medical applications, nondestructive testing methods, electronic warfare principles, through-the-wall radar propagation effects, and target identification through measuring the target return signal spectrum changes.
Download or read book The Micro doppler Effect in Radar written by Victor C. Chen and published by Artech House. This book was released on 2011 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Doppler Effect can be thought of as the change in frequency of a wave for an observer moving relative to the source of the wave. In radar, it is used to measure the velocity of detected objects. This highly practical resource provides thorough working knowledge of the micro-Doppler effect in radar, including its principles, applications and implementation with MATLAB codes. The book presents code for simulating radar backscattering from targets with various motions, generating micro-Doppler signatures, and analyzing the characteristics of targets. In this title, professionals will find detailed descriptions of the physics and mathematics of the Doppler and micro-Doppler effect. The book provides a wide range of clear examples, including an oscillating pendulum, a spinning and precession heavy top, rotating rotor blades of a helicopter, rotating wind-turbine blades, a person walking with swinging arms and legs, a flying bird, and movements of quadruped animals.
Download or read book Principles of Modern Radar written by Mark A. Richards and published by SciTech Publishing. This book was released on 2023-02-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Modern Radar: Basic Principles is a comprehensive text for courses in radar systems and technology, a professional training textbook for formal in-house courses and for new hires; a reference for ongoing study following a radar short course and a self-study and professional reference book.
Download or read book UWB Technology and its Applications written by Dusan Kocur and published by BoD – Books on Demand. This book was released on 2019-03-06 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-wideband (UWB) technology is a radio technology that uses electromagnetic waves with a very low power spectral density occupying a bandwidth of more than 25% of a centre frequency, or more than 0.5GHz, for short-range remote sensing, high-bandwidth communications or object positioning. The detailed analyses of state-of-the-art UWB technology has shown that this technology is very interesting and promising with a great application potential. Following these facts, our book attempts to present current and emerging trends in research and development of UWB systems. The book is focused on basic components of UWB systems such as antennas, filters, photonic approach for signal processing methods, as well as on some applications of UWB systems (human target analysis, cancer detection).
Download or read book High resolution Radar written by Donald R. Wehner and published by Artech House on Demand. This book was released on 1995 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using this updated, second edition version of the original radar reference, state-of-the-art radar can be designed for consumer, military and commercial applications. With over 25 percent new material, this reference describes the basic theory and design tools needed to develop, design and analyze high-resolution radar systems, subsystems, components and processing method. The text features convenient, one-volume coverage of radar systems that perform target imaging, surface mapping and conventional surveillance functions.
Download or read book Handbook of Radar Signal Analysis written by Bassem R. Mahafza and published by CRC Press. This book was released on 2021-08-30 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new handbook on radar signal analysis adopts a deliberate and systematic approach. It uses a clear and consistent level of delivery while maintaining strong and easy-to-follow mathematical details. The emphasis of this book is on radar signal types and their relevant signal processing and not on radar systems hardware or components. This handbook serves as a valuable reference to a wide range of audience. More specifically, college-level students, practicing radar engineers, as well as casual readers of the subject are the intended target audience of the first few chapters of this book. As the book chapters progress, these grow in complexity and specificity. Accordingly, later chapters are intended for practicing engineers, graduate college students, and advanced readers. Finally, the last few chapters contain several special topics on radar systems that are both educational and scientifically entertaining to all readers. The presentation of topics in this handbook takes the reader on a scientific journey whose major landmarks comprise the different radar subsystems and components. In this context, the chapters follow the radar signal along this journey from its birth to the end of its life. Along the way, the different relevant radar subsystems are analyzed and discussed in great detail. The chapter contributors of this new handbook comprise experienced academia members and practicing radar engineers. Their combined years of academic and real-world experiences are in excess of 175. Together, they bring a unique, easy-to-follow mix of mathematical and practical presentations of the topics discussed in this book. See the "Chapter Contributors" section to learn more about these individuals.
