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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.


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Patent
10 Dec 1992
TL;DR: In this paper, coherent clutter maps are used for reducing the clutter strength of radar echo signals which are applied to the moving target detection unit (4), by subtracting the coherent clutter strengths stored in the clutter maps from the radar echo signal.
Abstract: A radar apparatus provided with transmitter means (1), rotating antenna means (2) and receiver means (3) for the transmission per burst and the processing in a video processor of radar echo signals. The video processor includes moving target detection unit (4) provided with a doppler filter bank, for instance an FFT processor, and slow moving target detection unit (6), provided with coherent clutter maps, one map for each radar transmitter frequency used. The coherent clutter maps are also used for reducing the clutter strength of radar echo signals which are applied to the moving target detection unit (4), by subtracting the coherent clutter strengths stored in the clutter maps from the radar echo signals.

22 citations

ReportDOI
01 Mar 1967
TL;DR: In this paper, the performance of moving target indication (MTI) systems for combat surveillance radars depends to a large extent on the clutter spectrum, which is especially important when the radar attempts to detect slowly moving ground targets.
Abstract: : The performance of moving target indication (MTI) systems for combat surveillance radars depends to a large extent on the clutter spectrum, which is especially important when the radar attempts to detect slowly moving ground targets. This spectrum has long been assumed to be Gaussian shaped. However, MTI system performance predicted by this assumption was not achieved in practice. This report describes the results of an investigation conducted to determine the performance to be expected from an MTI system. The approach used was to measure the clutter rejection ratios afforded by various high-pass filters. The signal was taken from the boxcar demodulator of an X-band radar observing different clutter targets under varying wind conditions. Clutter rejection ratios of 10 to 40 db were measured. These results were then used to obtain a theoretical expression for the clutter power spectrum. This expression differs from the usual Gaussian assumption. Some credence is given to the results by a direct spectral analysis performed on a clutter signal. Two methods of filtering clutter signals which will result in acceptable MTI performance are suggested in this report. The results of this investigation are significant in that they have led to establishing criteria for a better MTI system design.

22 citations

Proceedings ArticleDOI
01 Dec 1998
TL;DR: In this article, the theoretical performance analysis of a class of STAP detection algorithms under ideal and non-ideal conditions including target steering vector mismatch, sidelobe targets and inhomogeneities, and the impact two of the training strategies (i) sliding window with de-emphasis and (ii) power selected training.
Abstract: First generation airborne radar systems were non-adaptive, performing such operations as moving target indication (MTI), synthetic aperture radar (SAR) imaging, and displaced phased center array (DPCA) data processing. In most cases the processing was separate in space and time (Doppler). Optimal joint space-time adaptive processing (STAP) methods for target detection and parameter estimation have been known for years but were computationally infeasible. Promising hardware technologies, however, have encouraged a revisitation of these optimal methods. The efforts of the DARPA sponsored Mountaintop Program brought to the surface some of the weaknesses of these algorithms (which were derived and therefore only optimal under rather ideal assumptions rarely satisfied in the real world). We consider the theoretical performance analysis of a class of STAP detection algorithms under ideal and non-ideal conditions including target steering vector mismatch, sidelobe targets and inhomogeneities, and the impact two of the training strategies (i) sliding window with de-emphasis and (ii) power selected training. The detection algorithms considered include the classical adaptive matched filter (AMF), the generalized likelihood ratio test (GLRT), and the more contemporary adaptive cosine estimator (ACE), and the 2-D adaptive sidelobe blanker (ASB).

22 citations

Journal ArticleDOI
TL;DR: It is shown that the proposed algorithm significantly reduces imaging artifacts while preserving the moving target signature.
Abstract: A moving target indication, noncoherent change detection algorithm is introduced to detect moving targets inside buildings. The proposed algorithm is designed to attenuate image artifacts observed in coherent change detection images by utilizing noncoherent change detection, a positive threshold operation, and sidelobe minimization. The proposed algorithm is compared with coherent change detection for three moving target scenarios. It is shown that the proposed algorithm significantly reduces imaging artifacts while preserving the moving target signature.

22 citations

Patent
28 Jun 1974
TL;DR: In this paper, a radar system of the type employing a receiver capable of responding to a signal reflected from a moving target, which signal includes a doppler frequency component indicative of target motion, is described.
Abstract: There is disclosed a radar system of the type employing a receiver capablef responding to a signal reflected from a moving target, which signal includes a doppler frequency component indicative of target motion. Included therewith are means for responding to an even harmonic component of said returned signal to provide an indication of the magnitude of the same, the magnitude of said even harmonic component indicative of the nature of said vehicle, as, for example, whether said vehicle is a tracked type (tank) or a wheeled type (automobile).

22 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202327
202272
202131
202052
201966
201859