Download or read book Radio Direction Finding and Superresolution written by P. J. D. Gething and published by IET. This book was released on 1991 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enlarged and revised second edition. Modern direction finders, capable of measuring elevation angles as well as azimuth angles on the components of multi-ray wavefields, have become powerful tools for research in ionospheric physics and HF radio propagation. The complexity of the problem of resolving closely-spaced rays requires the combined use of wide aperture antenna arrays, multichannel receiving systems and sophisticated digital processing techniques.

Download or read book Radio Direction Finding written by P. J. D. Gething and published by Institution of Electrical Engineers. This book was released on 1978 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Application of Superresolution Techniques in Radio Direction Finding written by S. Sharma and published by . This book was released on 1993 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Superresolution Array Processing Algorithms and HF Radio Direction finding written by Donald Brian Eidson and published by . This book was released on 1991 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Superresolution Methods for Tactical Radio Direction Finding written by and published by . This book was released on 1991 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report evaluates superresolution direction finding methods for land tactical narrowband very high frequency/ultrahigh frequency purposes. The DF methods are described and evaluated in depth using a common theoretical framework beginning with classical methods and ending with modern day eigenanalysis based methods. Based on this analysis, superresolution methods can be described in terms of a five step procedure where each step has a unique purpose the estimation process. Different methods vary according to the operations performed at each step. This is useful in analyzing and comparing the theoretical performance of various DF methods under the same conditions. The results from simulations are also included to support the theoretical evaluations.

Download or read book Comparison of Superresolution Algorithms with Different Array Geometries for Radio Direction Finding written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis is to investigate and evaluate the effectiveness of modern estimation methods with different array geometries as they apply to the problem of bearing estimation. The algorithms were selected from those that apply to multidimensional direction finding, and include MUSIC, PHD, minimum norm, and Capon's beam-former. These four techniques based on their high resolution capability, and their ability to deal with three-dimensional non-uniform arrays and to estimate both azimuth and elevation angle of arrival (AQA). Computer simulations were run linear arrays, circular array, and combinations of the two. The test conditions included: (1) two closely spaced emitters, and (2) various levels of additive white Gaussian noise.

Download or read book Comparison of Superresolution Algorithms with Different Array Geometries for Radio Direction Finding written by Ku-Ting Lin and published by . This book was released on 1998 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis is to investigate and evaluate the effectiveness of modern estimation methods with different array geometries as they apply to the problem of bearing estimation. The algorithms were selected from those that apply to multidimensional direction finding, and include MUSIC, PHD, minimum norm, and Capon's beam-former. These four techniques based on their high resolution capability, and their ability to deal with three-dimensional non-uniform arrays and to estimate both azimuth and elevation angle of arrival (AQA). Computer simulations were run linear arrays, circular array, and combinations of the two. The test conditions included: (1) two closely spaced emitters, and (2) various levels of additive white Gaussian noise.

Download or read book Comparison of Superresolution Algorithms with Different Array Geometriesfor Radio Direction Finding written by Ku-Ting Lin and published by . This book was released on 1998-09-01 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis is to investigate and evaluate the effectiveness of modern estimation methods with different array geometries as they apply to the problem of bearing estimation. The algorithms were selected from those that apply to multidimensional direction finding, and include MUSIC, PHD, minimum norm, and Capon's beam-former. These four techniques based on their high resolution capability, and their ability to deal with three-dimensional non-uniform arrays and to estimate both azimuth and elevation angle of arrival (AQA). Computer simulations were run linear arrays, circular array, and combinations of the two. The test conditions included: (1) two closely spaced emitters, and (2) various levels of additive white Gaussian noise.

Download or read book Radio Direction Finding The Resolution Of Multicomponent Wave fields written by P.I.D. Gething and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radio Direction finding and the Resolution of Multicompanent Wavefields written by P. J. D. Gething and published by . This book was released on 1978 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radio Direction Finding written by United States. Department of the Army and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern HF Signal Detection and Direction Finding written by Jay R. Sklar and published by MIT Press. This book was released on 2018-09-25 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailed descriptions of detection, direction-finding, and signal-estimation methods, using consistent formalisms and notation, emphasizing HF antenna array sensing applications. Adaptive antenna array technology encompasses many powerful interference suppression approaches that exploit spatial differences among signals reaching a radio receiver system. Today, worldwide propagation phenomenology occurring in the High Frequency (HF) radio regime has made such interference common. In this book, Jay Sklar, a longtime researcher at MIT Lincoln Laboratory, presents detailed descriptions of detection, direction-finding, and signal-estimation methods applicable at HF, using consistent formalisms and notation. Modern electronic system technology has made many of these techniques affordable and practical; the goal of the book is to offer practicing engineers a comprehensive and self-contained reference that will encourage more widespread application of these approaches. The book is based on the author's thirty years of managing MIT Lincoln Laboratory work on the application of adaptive antenna array technologies to the sensing of HF communication signals. After an overview of HF propagation phenomenology, communication signal formats, and HF receiver architectural approaches, Sklar describes the HF propagation environment in more detail; introduces important modulation approaches and signaling protocols used at HF; discusses HF receiver system architectural features; and addresses signal processor architecture and its implementation. He then presents the technical foundation for the book: the vector model for a signal received at an adaptive array antenna. He follows this with discussions of actual signal processing techniques for detection and direction finding, including specific direction-finding algorithms; geolocation techniques; and signal estimation.

Download or read book Electronic Warfare Receivers and Receiving Systems written by Richard A. Poisel and published by Artech House. This book was released on 2015-06-01 with total page 833 pages. Available in PDF, EPUB and Kindle. Book excerpt: Receivers systems are considered the core of electronic warfare (EW) intercept systems. Without them, the fundamental purpose of such systems is null and void. This book considers the major elements that make up receiver systems and the receivers that go in them. This resource provides system design engineers with techniques for design and development of EW receivers for modern modulations (spread spectrum) in addition to receivers for older, common modulation formats. Each major module in these receivers is considered in detail. Design information is included as well as performance tradeoffs of various components. Major factors that influence the functioning of the modules are identified and discussed. Key performance parameters are identified as well, and approaches to achieving design goals are considered.

Download or read book Radio Direction Finding written by David William Watson and published by . This book was released on 1971 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Radio Direction Finder and Its Application to Navigation written by Frederick August Kolster and published by . This book was released on 1922 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Classical and Modern Direction of Arrival Estimation written by T. Engin Tuncer and published by Academic Press. This book was released on 2009-07-10 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classical and Modern Direction of Arrival Estimation contains both theory and practice of direction finding by the leading researchers in the field. This unique blend of techniques used in commercial DF systems and state-of-the art super-resolution methods is a valuable source of information for both practicing engineers and researchers. Key topics covered are: - Classical methods of direction finding - Practical DF methods used in commercial systems - Calibration in antenna arrays - Array mapping, fast algorithms and wideband processing - Spatial time-frequency distributions for DOA estimation - DOA estimation in threshold region - Higher order statistics for DOA estimation - Localization in sensor networks and direct position estimation - Brings together in one book classical and modern DOA techniques, showing the connections between them - Contains contributions from the leading people in the field - Gives a concise and easy- to- read introduction to the classical techniques - Evaluates the strengths and weaknesses of key super-resolution techniques - Includes applications to sensor networks