Waveform Diversity And Detection In Distributed Radar Apertures
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Waveform Diversity And Detection In Distributed Radar Apertures
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Author : Earnest Lock
language : en
Publisher:
Release Date : 2008
Waveform Diversity And Detection In Distributed Radar Apertures written by Earnest Lock 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.
The field of distributed apertures is leading a resurgence of research into radar signal processing. A recent theme has been the notion of waveform diversity that is tailored to the nature of the distributed array. In this thesis, the use of waveform diversity in the detection of weak targets buried in interference is investigated. Two diversity schemes studied are varying pulse FM rates at each transmitter and frequency diversity via Orthogonal Frequency Division Multiplexing (OFDM), a concept borrowed from wireless communications. The use of OFDM eliminates problems with previously proposed frequency diversity schemes. The thesis also investigates the implementation of efficient adaptive processing schemes such as Joint Domain Localized (JDL) processing.
Principles Of Waveform Diversity And Design
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Author : Michael C. Wicks
language : en
Publisher: SciTech Publishing
Release Date : 2011-06-30
Principles Of Waveform Diversity And Design written by Michael C. Wicks and has been published by SciTech Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-06-30 with Technology & Engineering categories.
This is the first book to discuss current and future applications of waveform diversity and design in subjects such as radar and sonar, communications systems, passive sensing, and many other technologies. Waveform diversity allows researchers and system designers to optimize electromagnetic and acoustic systems for sensing, communications, electronic warfare or combinations thereof. This book enables solutions to problems, explaining how each system performs its own particular function, as well as how it is affected by other systems and how those other systems may likewise be affected. It is an excellent standalone introduction to waveform diversity and design, which takes a high potential technology area and makes it visible to other researchers, as well as young engineers.
Waveform Design And Diversity For Advanced Radar Systems
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Author : Antonio De Maio
language : en
Publisher:
Release Date : 2012
Waveform Design And Diversity For Advanced Radar Systems written by Antonio De Maio and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Electronic books categories.
In recent years, various algorithms for radar signal design, that rely heavily upon complicated processing and/or antenna architectures, have been suggested. Increasingly complex operating scenarios calls for sophisticated algorithms with the ability to adapt and diversify dynamically the waveform to the operating environment in order to achieve a performance gain over classic radar waveforms. This is essentially the subject of waveform diversity. This new flexibility demands new ways of characterizing waveform properties and optimizing waveform design. This ability is very critical in increasing our objective performance as the ability will match the transmission waveform to the transmission environment and the sensing objective. This book discusses concepts inherent to the application of waveform design and diversity for advanced radar detection, tracking, and classification. --
Meter Wave Synthetic Aperture Radar For Concealed Object Detection
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Author : Hans Hellsten
language : en
Publisher: Artech House
Release Date : 2017-05-31
Meter Wave Synthetic Aperture Radar For Concealed Object Detection written by Hans Hellsten and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-31 with Technology & Engineering categories.
This unique resource presents the principles of meter wave ground imaging radar focusing on foliage penetration. Scattering of VHF/UHF radar signals are presented including the basic laws of electromagnetism, homogeneous media, media discontinuities/non-flat media discontinuities, and ground reflectivity. The book introduces meter wavelength synthetic aperture radar, bandwidth, and SAR imaging principles, including moving objects and also compares collected SAR data. Meter wavelength SAR system design and processing is explored, highlighting low frequency SAR design aspects, characterization of additive noise, antenna system basics, waveforms and emission adaptation which is critical material to the advancement in sensors and signal processing for below ground imaging by the energy industry and governments worldwide. The FFBP method of processing, explicit treatment of base 2 FFBP is explained along with motion errors sensitivity and motion estimation methods. The book also explains the Bayesian change detection, covariance moving target extraction and polarimetric subsurface imaging.
Distributed Sensing For Mimo Radar Systems
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Author : Christos V. Ilioudis
language : en
Publisher:
Release Date : 2017
Distributed Sensing For Mimo Radar Systems written by Christos V. Ilioudis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
The research presented in this thesis deals with the concepts of distributed sensing for multiple-input multiple-output (MIMO) radar systems and important signal processing algorithms with regard to multiple sensing optimisations. These novel algorithms include an edge detection scheme based on the phase stretch transform (PST) for synthetic aperture radar (SAR) imaging systems, the application of the fractional Fourier transform (FrFT) in generating new waveform libraries and the synthesis of a generalised MIMO ambiguity function (AF) based on the Kullback-Leibler divergence (KLD). In particular, a new edge detection algorithm for SAR images is proposed. This method is an enhanced scheme that is based on the phase stretch transform (PST). The high-accuracy of the presented edge detection method is tested and verified experimentally using two SAR image datasets. Experimental results show that thresholding and further morphological operation leads in excellent edge extraction despite the noise embedded into the image. Including PST into the structure of the edge detection algorithm is proved to be very advantageous, since the efficiency in edge determining could be improved by means of tuning the strength and wrap parameters of PST phase kernel. It is shown that the proposed method is very effective and capable to remove embedded noise and introduced artefacts even from image parts corresponding to the surface of the sea. A novel waveform design scheme is proposed to create waveform libraries employing the FrFT. Additionally an efficient algorithm based on a modified Gerchberg-Saxton algorithm (MGSA) is developed to reconstruct the proposed fractional waveform libraries under constant envelope (CE) constrain. This efficient technique is capable of generating novel libraries of phase-coded waveforms through FrFT and optimise the signal retrieval, while the signal waveforms retain their constant modulus. Specifically, the reconstruction of sequences from the FrFTbased waveforms is achieved by means of the error reduction algorithm (ERA). The performance of this new method is evaluated via simulation analysis, showing the good properties of the waveforms in terms of AF performance parameters and in attaining high diversity between waveforms for both fractional and CE fractional libraries. In addition, the applicability of the derived fractional waveforms is experimentally validated, while their performance is evaluated through comparing with conventional techniques in a distributed MIMO radar scenario. Moreover, a novel-multiplexing scheme also based on the FrFT is introduced enabling radar systems to operate in a message exchange mode via embedding the required information into fractional waveforms. The efficiency of the proposed waveform design is evaluated regarding the AF properties of the communicating radar (Co-Radar) waveform. A new, generalised AF is presented based on the KLD and applied in a MIMO radar signal model. The proposed MIMO AF can be factorised into auto-correlation and cross-correlation signal matrices, and channel correlation matrices. Moreover, it is shown that the proposed MIMO AF maximally stretches between 0 and 1, while also being flexible for various geometrical and operating signal configurations. The relationship of the proposed MIMO AF with other definition is also examined, showing that it reduces to the traditional Woodward definition when the same signal model is assumed. In addition, the behaviour of the proposed MIMO AF is investigated for different target placements and operating waveforms highlighting the advantages of each configuration. Finally, the good performance of the AF is demonstrated in a simulated MIMO radar system.
Multi Antenna Synthetic Aperture Radar
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Author : Wen-Qin Wang
language : en
Publisher: CRC Press
Release Date : 2017-07-12
Multi Antenna Synthetic Aperture Radar written by Wen-Qin Wang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-07-12 with Technology & Engineering categories.
Synthetic aperture radar (SAR) is a well-known remote sensing technique, but conventional single-antenna SAR is inherently limited by the minimum antenna area constraint. Although there are still technical issues to overcome, multi-antenna SAR offers many benefits, from improved system gain to increased degrees-of-freedom and system flexibility. Multi-Antenna Synthetic Aperture Radar explores the potential and challenges of using multi-antenna SAR in microwave remote sensing applications. These applications include high-resolution imaging, wide-swath remote sensing, ground moving target indication, and 3-D imaging. The book pays particular attention to the signal processing aspects of various multi-antenna SAR from a top-level system perspective. Explore Recent Extensions of Synthetic Aperture Radar Systems The backbone of the book is a series of innovative microwave remote sensing approaches developed by the author. Centered around multi-antenna SAR imaging, these approaches address specific challenges and potential problems in future microwave remote sensing. Chapters examine single-input multiple-output (SIMO) multi-antenna SAR, including azimuth and elevation multi-antenna SAR, and multiple-input multiple-output (MIMO) SAR. The book details the corresponding system scheme, signal models, time/phase/spatial synchronization methods, and high-precision imaging algorithms. It also investigates their potential applications. Introductory Tutorials and Novel Approaches in Multi-Antenna SAR Imaging Rigorous and self-contained, this is a unique reference for researchers and industry professionals working with microwave remote sensing, SAR imaging, and radar signal processing. In addition to novel approaches, the book also presents tutorials that serve as an introduction to multi-antenna SAR imaging for those who are new to the field.
Intelligent Computing
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Author : Kohei Arai
language : en
Publisher: Springer
Release Date : 2018-11-01
Intelligent Computing written by Kohei Arai and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-01 with Technology & Engineering categories.
This book, gathering the Proceedings of the 2018 Computing Conference, offers a remarkable collection of chapters covering a wide range of topics in intelligent systems, computing and their real-world applications. The Conference attracted a total of 568 submissions from pioneering researchers, scientists, industrial engineers, and students from all around the world. These submissions underwent a double-blind peer review process. Of those 568 submissions, 192 submissions (including 14 poster papers) were selected for inclusion in these proceedings. Despite computer science’s comparatively brief history as a formal academic discipline, it has made a number of fundamental contributions to science and society—in fact, along with electronics, it is a founding science of the current epoch of human history (‘the Information Age’) and a main driver of the Information Revolution. The goal of this conference is to provide a platform for researchers to present fundamental contributions, and to be a premier venue for academic and industry practitioners to share new ideas and development experiences. This book collects state of the art chapters on all aspects of Computer Science, from classical to intelligent. It covers both the theory and applications of the latest computer technologies and methodologies. Providing the state of the art in intelligent methods and techniques for solving real-world problems, along with a vision of future research, the book will be interesting and valuable for a broad readership.
Radar Systems Peak Detection And Tracking
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Author : Michael Kolawole
language : en
Publisher: Newnes
Release Date : 2002
Radar Systems Peak Detection And Tracking written by Michael Kolawole and has been published by Newnes this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Technology & Engineering categories.
Preface. PART I: Essential Relational Functions; Understanding Radar Fundamentals; Antenna Physics and Radar Measurements; The Radar Equations; Antenna Arrays. PART II IONOSPHERE AND HF SKYWAVE RADAR: The Ionosphere and Its Effect on HF Skywave Propagation; Skywave radar. PART III PROBABILITY THEORY, DECISION THEORY AND SIGNAL PEAK DETECTION: Elements of probability theory and statistical concepts; Decision theory; Signal Peak Detection. PART IV: Parameter Estimation and Filtering; Tracking. Conclusion; Summary; References; Problems; Glossary of Terms; Index.
Waveform Design And Diversity For Advanced Radar Systems
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Author : Fulvio Gini
language : en
Publisher: IET
Release Date : 2012-05-18
Waveform Design And Diversity For Advanced Radar Systems written by Fulvio Gini and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-18 with Technology & Engineering categories.
This is the first book to discuss current and future applications of waveform diversity and design in subjects such as radar and sonar, communications systems, passive sensing, and many other technologies. Waveform diversity allows researchers and system designers to optimize electromagnetic and acoustic systems for sensing, communications, electronic warfare or combinations thereof. It enables solutions to problems with how each system performs its own particular function as well as how it is affected by other systems and how those other systems may likewise be affected. It is an excellent standalone introduction to waveform diversity and design, which takes a high potential technology area and makes it visible to other researchers, as well as young engineers.
Synthetic Aperture Radar
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Author : J. Patrick Fitch
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Synthetic Aperture Radar written by J. Patrick Fitch and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
Radar, like most well developed areas, has its own vocabulary. Words like Doppler frequency, pulse compression, mismatched filter, carrier frequency, in-phase, and quadrature have specific meaning to the radar engineer. In fact, the word radar is actually an acronym for RAdio Detection And Rang ing. Even though these words are well defined, they can act as road blocks which keep people without a radar background from utilizing the large amount of data, literature, and expertise within the radar community. This is unfortunate because the use of digital radar processing techniques has made possible the analysis of radar signals on many general purpose digi tal computers. Of special interest are the surface mapping radars, such as the Seasat and the shuttle imaging radars, which utilize a technique known as synthetic aperture radar (SAR) to create high resolution images (pic tures). This data appeals to cartographers, agronomists, oceanographers, and others who want to perform image enhancement, parameter estima tion, pattern recognition, and other information extraction techniques on the radar imagery. The first chapter presents the basics of radar processing: techniques for calculating range (distance) by measuring round trip propagation times for radar pulses. This is the same technique that sightseers use when calculat ing the width of a canyon by timing the round trip delay using echoes. In fact, the corresponding approach in radar is usually called the pulse echo technique.