Journal ArticleDOI
Two-Step Detector for RADARSAT-2's Experimental GMTI Mode
Reads0
Chats0
TLDR
The proposed constant false alarm rate target detection is based on a novel and thorough analysis of the multilook test statistics and is significantly reduced by a complementary detection step using the along-track interferometric phase.Abstract:
Ground moving target indication (GMTI) from space has currently raised interest from wide area traffic monitoring as well as for military surveillance activities. This paper presents theoretical and real data GMTI results of RADARSAT-2's Moving Object Detection Experiment based on data gathered during the commissioning phase in February 2008. The proposed constant false alarm rate target detection is based on a novel and thorough analysis of the multilook test statistics. The practical and relevant case in which a target, for instance a passenger car, occurs in only l-out-of-n ground resolution multilook cells is analyzed. This general case is analyzed for the determination of adequate detection thresholds as well as the anticipated probability of detection Pd particularly with regard to a varying degree of terrain heterogeneity and target characteristics. The overall false alarm rate Pfa is significantly reduced by a complementary detection step using the along-track interferometric phase. The validity of these theoretical findings are corroborated by real two-channel space-based synthetic aperture radar-GMTI data of civilian vehicles of opportunity, whose main parameters have been estimated and compared with the derived Cramer-Rao Bounds.read more
Citations
More filters
Journal ArticleDOI
The New Era of Counterforce: Technological Change and the Future of Nuclear Deterrence
Keir A. Lieber,Daryl G. Press +1 more
TL;DR: In the nuclear age, counter-force disarming attacks were nearly impossible because of the ability of potential victims to hide and protect their nuclear arsenals as mentioned in this paper. But advances rooted in the computer revolution have made nuclear forces around the world considerably more vulnerable.
Journal ArticleDOI
A Fast SAR Imaging Method for Ground Moving Target Using a Second-Order WVD Transform
TL;DR: A novel motion parameter estimation method named second-order Wigner-Ville distribution (SoWVD) transform is proposed, and then, a new SAR imaging method based on the SoWVD for a ground moving target is developed.
Journal ArticleDOI
Narrow-Band Interference Suppression for SAR Based on Independent Component Analysis
TL;DR: This paper proposes a new method for NBI suppression in the data domain based on the independent component analysis (ICA), which copes well with the time-varying NBI with little signal loss.
Journal ArticleDOI
Geometry-Information-Aided Efficient Radial Velocity Estimation for Moving Target Imaging and Location Based on Radon Transform
TL;DR: An efficient Radon transform (RT) estimation is proposed to estimate the radial velocity of fast moving target by utilizing the geometry information, and much more geometry information is exploited to realize clutter cancellation, noise cancellation, and estimation error minimizing in the RT domain, which is not proposed by the others.
Journal ArticleDOI
Multichannel SAR-GMTI in Maritime Scenarios With F-SAR and TerraSAR-X Sensors
TL;DR: The objective of the paper is to highlight the limitations and challenges to be considered when processing real, multichannel GMTI data from pioneering SAR sensors for maritime surveillance.
References
More filters
A complex gradient operator and its application in adaptive array theory
TL;DR: In this paper, the problem of minimizing a real scalar quantity (for example array output power, or mean square error) as a function of a complex vector (the set of weights) frequently arises in adaptive array theory.
Book
Sea Clutter: Scattering, the K Distribution and Radar Performance
TL;DR: In this paper, the authors present an authoritative account of the current understanding of radar sea clutter, including the characteristics of radar clutter, modelling radar scattering by the ocean surface, statistical models of sea clutter and other random processes, detection of small targets in sea clutter.
Journal ArticleDOI
A model for extremely heterogeneous clutter
TL;DR: A special case of this new class of distributions, G distributions, arising from the multiplicative model, that has as many parameters as K distributions, is shown able to model extremely heterogeneous clutter, such as that of urban areas, that cannot be properly modeled with K distributions.
Journal ArticleDOI
Phase statistics of interferograms with applications to synthetic aperture radar
D. Just,Richard Bamler +1 more
TL;DR: This work analyzes quantitatively the influence of decorrelation on the phase statistics of SAR interferograms and the dependence of the resulting phase bias and variance on processor parameters is presented.