Download or read book Adaptive Detection in Non stationary Interference Part I and written by Edward Joseph Kelly and published by . This book was released on 1985 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Detection in Non stationary Interference written by Edward Joseph Kelly and published by . This book was released on 1987 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Detection in Non Stationary Interference Part 1 and Part 2 written by and published by . This book was released on 1985 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report, which consists of two parts, the problem of radar target detection in a background of non-stationary external interference is considered. The object of the analysis is to treat this problem from the point of view of statistical decision theory, and to derive a signal processing algorithm which accepts the totality of inputs on which final decision is to be based, and performs both interference suppression and target detection. It is assumed that the radar is provided with multiple RF input channels and that target-free samples, from range gates other than one in which a target is being sought, can be used for the estimation of the interference statistics. In Part I a general formulation is given and a likelihood ratio detection rule is derived.
Download or read book Adaptive Detection in Non Stationary Interference Part 3 written by and published by . This book was released on 1987 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of Parts I and II of the report with this title has been extended into two directions. In the first case, the performance of an adaptive system with respect to signals arriving from directions other than the steering direction is evaluated. It is shown that these signals are reflected more strongly than would be suggested by the sidelobe levels of the adaptive patterns themselves. In the other case, the detection problem is generalized to include the detection of signals known only to lie in a subspace of the space of steering vectors. Again, performance is derived and the penalty associated with the greater uncertainty of the signal model is shown to be small. The analysis of Part I essentially repeated here, both to keep this report self-contained and to present an alternative version of the basic derivations. Keywords: Adaptive antennas; Signal to noise ratio; Maximum likelihood detection statistical hypothesis testing; Signal to noise ratio; Gaussian noise.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Radar Detection Model Based Data Driven and Hybrid Approaches written by Angelo Coluccia and published by Artech House. This book was released on 2022-11-30 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows you how to adopt data-driven techniques for the problem of radar detection, both per se and in combination with model-based approaches. In particular, the focus is on space-time adaptive target detection against a background of interference consisting of clutter, possible jammers, and noise. It is a handy, concise reference for many classic (model-based) adaptive radar detection schemes as well as the most popular machine learning techniques (including deep neural networks) and helps you identify suitable data-driven approaches for radar detection and the main related issues. You’ll learn how data-driven tools relate to, and can be coupled or hybridized with, traditional adaptive detection statistics; understand fundamental concepts, schemes, and algorithms from statistical learning, classification, and neural networks domains. The book also walks you through how these concepts and schemes have been adapted for the problem of radar detection in the literature and provides you with a methodological guide for the design, illustrating different possible strategies. You’ll be equipped to develop a unified view, under which you can exploit the new possibilities of the data-driven approach even using simulated data. This book is an excellent resource for Radar professionals and industrial researchers, postgraduate students in electrical engineering and the academic community.
Download or read book Advanced Radar Detection Schemes Under Mismatched Signal Models written by Francesco Bandiera and published by Springer Nature. This book was released on 2022-06-01 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive detection of signals embedded in correlated Gaussian noise has been an active field of research in the last decades. This topic is important in many areas of signal processing such as, just to give some examples, radar, sonar, communications, and hyperspectral imaging. Most of the existing adaptive algorithms have been designed following the lead of the derivation of Kelly's detector which assumes perfect knowledge of the target steering vector. However, in realistic scenarios, mismatches are likely to occur due to both environmental and instrumental factors. When a mismatched signal is present in the data under test, conventional algorithms may suffer severe performance degradation. The presence of strong interferers in the cell under test makes the detection task even more challenging. An effective way to cope with this scenario relies on the use of "tunable" detectors, i.e., detectors capable of changing their directivity through the tuning of proper parameters. The aim of this book is to present some recent advances in the design of tunable detectors and the focus is on the so-called two-stage detectors, i.e., adaptive algorithms obtained cascading two detectors with opposite behaviors. We derive exact closed-form expressions for the resulting probability of false alarm and the probability of detection for both matched and mismatched signals embedded in homogeneous Gaussian noise. It turns out that such solutions guarantee a wide operational range in terms of tunability while retaining, at the same time, an overall performance in presence of matched signals commensurate with Kelly's detector. Table of Contents: Introduction / Adaptive Radar Detection of Targets / Adaptive Detection Schemes for Mismatched Signals / Enhanced Adaptive Sidelobe Blanking Algorithms / Conclusions
Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1988 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subspace Based Adaptive Detection Using a Generalized Likelihood Ratio Test written by Keith Alan Burgess and published by . This book was released on 1994 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Detection in Stationary and Nonstationary Noise Environments written by Paul Monticciolo and published by . This book was released on 1994 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the statistical performance of several radar- based adaptive detection schemes in both stationary and nonstationary noise and interference environments. The detectors under study must be able to correctly determine the presence of a target in a range gate with a high degree of probability given that the probability of misclassification is a fixed small value. The hostile noise environment is assumed to consist of possibly time- varying, spatially correlated interference along with Gaussian background noise. In a typical radar environment, the mean value of the returned radar signal and the noise covariance matrix are unknown parameters; therefore, generalized likelihood ratio test procedures were used to develop decision rules that meet the Neyman-Pearson criterion. Three major cases of interest were examined. First, the single-pulse test developed by Kelly is reviewed. The multiple-pulse return test case is extremely complicated and was divided into distinct detector forms: noncoherent and coherent. The performance of each detector is a function of the signal-to-noise ratio, the number of radar pulse returns used in the decision rule, and the quality of the covariance estimate.
Download or read book Satellite Personal Communications for Future generation Systems written by Enrico Del Re and published by Springer Science & Business Media. This book was released on 2002-02-05 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consisting of selected technical contributions to the European Project COST252 (Evolution of Satellite Personal Communications from 2nd to Future Generation Systems) this volume provides many innovative results which can be the basis for new global (mobile /terrestrial/satellite) telecommunications systems providing multimedia services at high rates. The latest research results and new perspectives on communications problems are presented in areas such as: - Satellite systems; - Management signalling and resource allocation; - CDMA system and receivers; - Protocols; - Coding; - Satellite-ATM and Satellite-UMTS. The book deals with the satellite components for the third-generation mobile UMTS/IMT-2000 Systems. The satellite component (both geostationary and non-geostationary constellations of satellites) of the future systems offers in particular an effective mean for providing advanced mobile wideband multimedia services to users the world-wide at rates up to 2Mb/s. Satellite Personal Communications for Future-generation Systems will be of particular interest for both researchers and telecommunications professionals.
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acoustic Signal Processing for Ocean Exploration written by J.M.F Moura and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustic Signal Processing for Ocean Explortion has two major goals: (i) to present signal processing algorithms that take into account the models of acoustic propagation in the ocean and; (ii) to give a perspective of the broad set of techniques, problems, and applications arising in ocean exploration. The book discusses related issues and problems focused in model based acoustic signal processing methods. Besides addressing the problem of the propagation of acoustics in the ocean, it presents relevant acoustic signal processing methods like matched field processing, array processing, and localization and detection techniques. These more traditional contexts are herein enlarged to include imaging and mapping, and new signal representation models like time/frequency and wavelet transforms. Several applied aspects of these topics, such as the application of acoustics to fisheries, sea floor swath mapping by swath bathymetry and side scan sonar, autonomous underwater vehicles and communications in underwater are also considered.
Download or read book Sensors and Their Applications XI written by K. T. V. Grattan and published by CRC Press. This book was released on 2018-05-04 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: With research continuing to expand and develop, the marketplace for sensors and instrumentation remains one of the most significant for the United Kingdom, the European Union, and the economies of major developed nations. Sensors and Their Applications XI discusses novel research in the field of sensors and transducers, and provides valuable insight into new and topical applications of the technology. The book records the breadth and quality of the field and acts as a topical record of work in sensors and their applications. It will serve as an invaluable reference for physicists, engineers, and chemists working in this area of technology for many years to come.
Download or read book On Adaptive Multiband Detection of Targets in Nonstationary Nonhomogeneous Interference written by H. Wang and published by . This book was released on 1991 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressed in this report is the problem of detecting a known signal in strong, severely non-stationary/nonhomogeneous interference of unknown statistics. Two approaches are proposed. The first one is the multiband signaling and detection scheme which makes possible a trade-off between data quantity and signal quality. Two multiband algorithms, the MultiBand Sample Matrix Inversion (MB-SMI) and Generalized Likelihood Ratio (MB-GLR) algorithms, are thus developed and shown to be able to significantly outperform the corresponding single-band algorithms, providing a potential solution to the problem which exists when the data available for learning are severely limited by the environment. To obtain the desirable CFAR feature in colored Gaussian interference at a lower computational cost, we modify the MB-SMI and obtain the MultiBand Modified-SMI (MB-MSMI) algorithm. The performance comparisons of the MB-MSMI and MB-GLR show that in Gaussian interference, the detection performance difference between the two algorithms is practically negligible and therefore, the use of the MB-GLR is unnecessary as it requires more implementation complexity. In non-Gaussian interference, however, the MB-GLR is preferable due to its much lower performance sensitivity than the MB-MSMI. To further improve the system performance, also proposed in this report is an approach which explores interference covariance structure to reduce the uncertainty in estimating unknown statistics.
Download or read book Simplified Robust Adaptive Detection and Beamforming for Wireless Communications written by Ayman ElNashar and published by John Wiley & Sons. This book was released on 2018-06-11 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an alternative and simplified approaches for the robust adaptive detection and beamforming in wireless communications. It adopts several systems models including DS/CDMA, OFDM/MIMO with antenna array, and general antenna arrays beamforming model. It presents and analyzes recently developed detection and beamforming algorithms with an emphasis on robustness. In addition, simplified and efficient robust adaptive detection and beamforming techniques are presented and compared with exiting techniques. Practical examples based on the above systems models are provided to exemplify the developed detectors and beamforming algorithms. Moreover, the developed techniques are implemented using MATLAB—and the relevant MATLAB scripts are provided to help the readers to develop and analyze the presented algorithms. em style="mso-bidi-font-style: normal;"Simplified Robust Adaptive Detection and Beamforming for Wireless Communications starts by introducing readers to adaptive signal processing and robust adaptive detection. It then goes on to cover Wireless Systems Models. The robust adaptive detectors and beamformers are implemented using the well-known algorithms including LMS, RLS, IQRD-RLS, RSD, BSCMA, CG, and SD. The robust detection and beamforming are derived based on the existing detectors/beamformers including MOE, PLIC, LCCMA, LCMV, MVDR, BSCMA, and MBER. The adopted cost functions include MSE, BER, CM, MV, and SINR/SNR.
Download or read book Proceedings written by and published by . This book was released on 1992 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
