Download or read book MTI Radar written by D. Curtis Schleher and published by Artech House Publishers. This book was released on 1978 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radar Range Gated MTI Moving Target Indicator Processor written by Nejat Koral and published by . This book was released on 1972 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty range-gated channels and the associated timing circuits were constructed for implementation of a moving-target indicator (MTI) by range-gates and filters (RGF). Improvement over existing systems was accomplished by simplification in the range-gated channels. Elements of the system include both discrete and integrated circuits. A design objective was to achieve reliable and jitter-free gating pulses with timing flexibility. Performance of the system was tested in conjunction with the AN/UPS-1 air search radar. (Author).

Download or read book Design Considerations for an Airborne Ground Moving Target Indicator GMTI Pulse Doppler Radar written by Jean Lavelle Calahan and published by . This book was released on 1981 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study on Ground Moving Target Indication and Imaging Technique of Airborne SAR written by Jian Yang and published by Springer. This book was released on 2017-01-09 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a detailed analysis of the signal model of the moving target, this thesis focuses on the theories and applications of ground moving target indicator (GMTI) and ground moving target imaging (GMTIm) algorithms in synthetic aperture radar/ ground moving target indicator (SAR/GMTI mode), wide-area surveillance ground moving target indication (WAS-GMTI) mode and frequency modulated continuous wave synthetic aperture radar (FMCW SAR) systems. The proposed algorithms can not only indicate and image fast-moving targets, but are also effective in the context of slow-moving target processing. The system design scheme combines the mechanical scanning mode and the airborne SAR system, while the azimuth moving target indication algorithm employs the additional range walk migration induced by FMCW SAR systems. In addition, the non-ideal errors that deteriorate the performance of GMTIm algorithms in real SAR data processing are discussed, and suitable compensation methods are provided.>

Download or read book Maximizing Moving Target Indicator MTI Performance in a Helicopter Borne Radar written by Donald L. Clough and published by . This book was released on 1969 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes the effect of radar platform motion on the frequency spectrum of the received radar signal. The problem of Doppler frequency smear caused by platform motion scanning modulation, ground winds, etc. for a helicopter-borne L-band surveillance radar is discussed. The radar uses a moving target indicator mode (MTI) to discriminate between the received signal energy which is at a frequency reflecting the Doppler shift caused by the target and the energy which has been reflected by the background area. The report specifically addresses itself to the analyses of the frequency content of the received signal by digital computer processes and how the low frequency cutoff point of the MTI filter can be selected such that maximum probability of detecting a target results. (Author).

Download or read book Automatic Detection and Radar Data Processing written by D. Curtis Schleher and published by Artech House Publishers. This book was released on 1980 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Approaches to Ground Moving Target Indicator Radar written by Michael Richard Riedl and published by . This book was released on 2016 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing the resolution of radar imaging and ground moving target indicator (GMTI) systems puts a stress on both hardware and processing limitations. Hardware must be able to handle the transfer of the large amounts of data generated. Additionally, the processing must be robust to any heterogeneity of the data that is introduced by collecting returns from large swaths. This dissertation presents system architectures and knowledge-aided processing techniques to combat the large data rates and data heterogeneity. Ground moving target indicator radar techniques for airborne platforms require spatial and Doppler signal diversity for separating the returns of moving targets from the returns of ground clutter. The traditional use of multiple receive antennas for jointly imaging a scene and detecting moving objects is prohibited by the system bottleneck at the data down-link. We present a frequency division multiple access, multiple-transmit single-receive radar architecture, with associated waveform design and data processing procedure. The proposed approach is demonstrated to jointly provide imaging and GMTI modalities while maintaining the data rate to that of a single antenna imaging system. Heterogeneity of the radar backscatter data degrades detection performance by biasing statistical parameters estimated from the data. A GMTI processing technique, known as space-time adaptive processing (STAP), requires estimation of the space-time covariance of the clutter for use in a generalized likelihood ratio test. Consequently, the performance of STAP is related to the quality of the estimated clutter covariance matrix; however, in practice it is common for the data to be limited, contaminated, and heterogeneous. In this dissertation, we introduce and evaluate two estimators for the clutter covariance and a purely Bayesian detection scheme. A Bayesian model is postulated for the angle/Doppler scene to incorporate approximate prior knowledge of the terrain height and the platform kinematics. Posterior probabilities computed using the model are then used to either estimate a covariance matrix or directly report posterior probabilities of the presence of a target. The approach is a novel means for incorporating operational knowledge into GMTI processing and admits low-complexity algorithmic implementation via recent advances in Bayesian message passing algorithms. In the second covariance estimator, a regularized shrinkage approach is proposed, whereby prior knowledge is expressed through an elastic net regularization penalty on a minimum expected squared error estimation cost. The regularized shrinkage estimator is shown to coincide with a minimax robust covariance estimator and offers simplicity in modeling and computation that may facilitate use by practitioners. In the third approach, the Bayesian model is augmented to jointly estimate calibration parameters for unknown antenna phases and detect moving targets. The performances of the proposed estimators and detectors are evaluated using the KASSPER I dataset. We conclude that the proposed approaches extend the state-of-the-art to provide reliable detection performance when the training data is limited to a number of range bins less than the rank of the true covariance matrix. Further, when presented no training data, the Bayesian approach is shown to maintain performance using only the data under test. Finally, the purely Bayesian detection approach, when combined with antenna calibration, is observed to provide enhanced resolution, allowing reliable detection of multiple targets within a single range bin not achievable with traditional STAP.

Download or read book Maximizing Moving Target Indicator MTI Performance in a Helicopter borne Radar written by Donald L. Clough and published by . This book was released on 1969 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radar Signal Analysis and Processing Using MATLAB written by Bassem R. Mahafza and published by CRC Press. This book was released on 2016-04-19 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering radar-related software for the analysis and design of radar waveform and signal processing, Radar Signal Analysis and Processing Using MATLAB provides a comprehensive source of theoretical and practical information on radar signals, signal analysis, and radar signal processing with companion MATLAB code. Aft

Download or read book Impairments in Ground Moving Target Indicator GMTI Radar written by Phuoc Doan Huu Vu and published by . This book was released on 2018 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the second part of the dissertation,the effect of phase noise on space-time adaptive processing in general, and spatial processing in particular is studied. A power law model is assumed for the phase noise. It is shown that a composite model with several terms is required to properly model the phase noise. It is further shown that the phase noise has almost linear trajectories. The effect of phase noise on spatial processing is analyzed. Simulation results illustrate the effect of phase noise on degrading the performance in terms of beam pattern and receiver operating characteristics. A STAP application, in which spatial processing is performed (together with Doppler processing) over a coherent processing interval, is envisioned.

Download or read book Performance Limits for Exo clutter Ground Moving Target Indicator GMTI Radar written by and published by . This book was released on 2010 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of a Ground Moving Target Indicator (GMTI) radar system depends on a variety of factors, many which are interdependent in some manner. It is often difficult to 'get your arms around' the problem of ascertaining achievable performance limits, and yet those limits exist and are dictated by physics. This report identifies and explores those limits, and how they depend on hardware system parameters and environmental conditions. Ultimately, this leads to a characterization of parameters that offer optimum performance for the overall GMTI radar system. While the information herein is not new to the literature, its collection into a single report hopes to offer some value in reducing the 'seek time'.

Download or read book An Airborne Radar Technique for Moving target Detection Location and Tracking written by John K. Schindler and published by . This book was released on 1973 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel technique for detecting, locating, and tracking moving targets from an airborne radar platform is described and analyzed. The technique uses the generally dissimilar linear doppler frequency modulated signals from moving targets and stationary ground clutter. A matched filter processor is defined and its resolution and ambiguity properties studied as function processor parameters. Sub-clutter visibility of the processor is then determined. Two techniques for digitally implementing the processor are discussed and the computational efficiencies briefly analyzed. Finally, target angular position can be determined using phase monopulse. It is then shown that target velocity--both ground speed and target heading--can be determined from radar observables. (Author).

Download or read book Design Technique for Improved Bandwidth Moving Target Indicator Processors in Surface Radars written by Donald W. Burlage and published by . This book was released on 1975 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A technique is presented for assigning the number and values of a set of transversal digital filter weights used with a moving target indicator filter to remove clutter. The approach involves a tradeoff between the amount of clutter rejection and useable bandwidth over which a moving target indicator filter satisfactorily passes a doppler signal; i.e., a specified detection probability is met or exceeded. The useable bandwidth is enhanced by an integrator which sums the B outputs from an N-tap, fixed window moving target indicator filter during a beam dwell of NB pulses. The procedure is applicable to any moving target indicator radar which employs a transversal moving target indicator filter and a reasonable number of returns/beam dwell. The narrow-band clutter example (Gaussian power spectrum, sigma = 5 Hz) indicates an improvement in useable bandwidth from the 62% achievable with 16 outputs from a conventional three-pulse canceller to 80.8% for five outputs from a nine-tap Chebyshev filter, while only reducing the clutter rejection from 92 to 69 dB.

Download or read book Modern Radar Systems written by Hamish Meikle and published by Artech House. This book was released on 2008 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised and updated edition to the popular Artech House book, Modern Radar Systems, offers complete and current coverage of the subject, including new material on accuracy, resolution, and convolution and correlation. The book features more than 540 illustrations (drawn in Maple V) that offer a greater understanding of various waveforms, and other two- and three-dimensional functions, to help you more accurately analyze radar system performance. The effects of pulse shaping on transmitter stability and spectra are discussed? a topic which is becoming more and more important in the age of electromagnetic compatibility. The book addresses the importance of low attenuation and reflection between the main radio frequency blocks, including the use of oversized waveguides for long runs.

Download or read book Moving Target Indication by Noncoherent Detection written by Isaac Leṿin and published by . This book was released on 1975 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An IF amplifier and detector were designed for a noncoherent MTI radar. The amplifier was designed to satisfy the following two requirements: (A) The amplifier must not overload; saturation due to large signals is not permitted. (B) When strong clutter is present, the amplifier must amplify the peak of the signal, since the effects due to small moving targets are carried in the peak of the resultant signal. The performance of the AN/UPS-1 air search radar, operated as a noncoherent MTI system with the modified IF amplifier, was checked. This modification provides increased sensitivity for the noncoherent MTI radar over a radar employing a logarithmic IF amplifier. The advantage of noncoherent MTI is its simplicity. It is therefore attractive for those applications where space and weight are limited. It is also attractive for airborne applications since no compensation is required for radar motion. (Author).

Download or read book Acquisition of the Synthetic Aperture Radar Moving Target Indicator written by and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Those who are specifically involved in the management, support, and oversight of the Synthetic Aperture Radar/Moving Target Indicator (SAR/MTI) should read this report because it discusses why the SAR/MTI program was halted and pending program actions The SAR/MTI is an Army acquisition category III program. SAR/MTI, when installed on the Tactical Unmanned Aerial Vehicle (TUAV), is to provide imaging of stationary targets and detection of moving targets, resulting in the tactical commander having increased situational awareness during periods of adverse weather and through battlefield obseurants The Army estimates that total life-cycle costs would exceed $100 million for acquiring, operating, and maintaining 86 SAR/MTI systems.

Download or read book Advances in Bistatic Radar written by Nicholas J. Willis and published by SciTech Publishing. This book was released on 2007-06-30 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive reference updates bistatic and multistatic radar developments since the publication of Nicholas Willis' seminal book Bistatic Radar published in 1991 and revised in 1995. The book is organized into two major sections: Bistatic/ Multistatic Radar Systems and Bistatic Clutter and Signal Processing. New and recently declassified military applications are documented. Civil applications are detailed for the first time, including commercial and scientific systems. Several of the most honored radar engineers of this era provide expertise in each of these applications. Professionals in radar and sonar will find this book a valuable resource