Moving target indication

About: Moving target indication is a research topic. Over the lifetime, 2653 publications have been published within this topic receiving 32435 citations.

Lattice-filter-based ground clutter canceller for pulse Doppler weather radar

Abstract: The paper presents the methodology of a synthesis of ground clutter rejector filter for pulse Doppler weather radar. The methodology allows to synthesize finite-impulse-response ground clutter filters with controlled width and depth of clutter rejection notch. Possible way to take into account the unevenness of rejector filter velocity characteristic in its passband is described. The universal lattice filters are demonstrated to be an effective tool for practical implementation of clutter filters been proposed.

Performance analysis of polarization-space- time three-domain joint processing for clutter suppression in airborne radar

Abstract: An optimum polarization-space-time joint domain pro- cessing (PST-JDP) technique is proposed for clutter suppression which adequately adopts the three-domain information including the polar- ization, space and Doppler frequency information of the radar echo. The study shows that the polarization information together with the space and Doppler frequency information are efiective to signiflcantly enhance the clutter suppression performance for airborne radar. Sev- eral new techniques, (i.e., the covariance matrix eigendecomposition, the spectral analysis and the resolution grid method), are utilized for deriving the performance of the optimum PST-JDP. The main factors which afiect on the performance of clutter rejection are the clutter degree of polarization, statistical distance of polarization between tar- get and clutter, Doppler frequency of target and input clutter-to-noise ratio. The new optimum PST-JDP method outperforms signiflcantly the traditional optimum space-time processing technology, especially in the case of the slowly or tangentially moving target. The simulation verifles the correctness and e-ciency of the model.

Clutter rejection using connectivity

Abstract: In a FLIR target detection system, true targets (52) are isolated from potential false target indications produced by background clutter through the use of a connectivity algorithm which attempts to find around each potential target (52) a closed path (65) of lower (or higher) intensity without exceeding a predetermined distance from the centroid (64) of the potential target. If the attempt is successful, the potential target (52) is a true target; if not, it is clutter.

Ground Moving Target Tracking and Exploitation Performance Measures

Abstract: : Ground Moving Target Indication provides a unique source of information for the exploitation of surface and low flying aircraft at long range, in all weather, providing situation awareness, targeting, and intelligence information. While airborne moving target indication and fire control radars have been around for a long period of time, it has been only the last decade when Ground Moving Target Indication (GMTI) data has been collected and used to prosecute mobile surface targets. This presentation addresses the use of GMTI data from providing intelligence information to the analysis and leads to the challenges associated with doing long-term track maintenance. The intelligence community has been expressing interest in GMTI data since 1999 when investments were made to develop the first exploitation capability that focused on products from Joint STARS GMTI data providing a web based capability to process and exploit Joint STARS data via a Network Centric Architecture. At the same time, DARPA and AFRL were pursuing the Long Term Track Maintenance challenge performing multi- platform command and control, horizontally fusing multiple sensors with weapons for a long-range precision fire control system. The focus of this presentation is to cover performance metrics. The metrics will be associated with operators-in-the-loop evaluations looking at intelligence and analysis for the find, fix, track, and assess portion of the weapon. The second set of metrics focus on long- term track maintenance evaluations. Track accuracy and persistence in time critical targeting, which address the track, target, and engage portion of the weapon chain. Programs to be discussed include the Moving Target Information Exploitation System (MTIX) program with respect to intelligence products, the Multi-Platform Tracking Exploitation (MPTE) and the Affordable Moving Surface Target Engagement (AMSTE) programs with respect to Long Term Track Maintenance and Precision Fire Control.

Sea clutter modelling for space-time processing

Abstract: The generation of synthetic environments, especially surface clutters, is of utmost importance for the study, the development and the qualification of radars. We focus here on sea clutter observed from airborne radars. The modeling of sea clutter is fairly different with regard to the ground clutter one. Indeed, the sea surface is a “deformable” surface unlike the land surface that is a “static” surface. Three levels of complexity of the clutter simulation are considered from the non-coherent single channel clutter up to coherent signals on multiple channels involved in complex detection modes such as STAP taking benefit on Space and Time correlations. A discussion on the interest of such STAP modes face to sea clutter ends the paper.