DocumentCode :
810085
Title :
Tracking evasive move-stop-move targets with a GMTI radar using a VS-IMM estimator
Author :
Kirubarajan, Thiagalingam ; Bar-Shalom, Y.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
Volume :
39
Issue :
3
fYear :
2003
fDate :
7/1/2003 12:00:00 AM
Firstpage :
1098
Lastpage :
1103
Abstract :
We present the design of a variable structure interacting multiple model (VS-IMM) estimator for tracking evasive ground targets using ground moving target indicator (GMTI) reports obtained from an airborne sensor. In order to avoid detection by the GMTI sensor, the targets use a "move-stop-move" strategy, where a target deliberately stops or moves at a very low speed for some time before accelerating again. In this case, when the target\´s radial velocity (along the line of sight from the sensor) falls below a certain minimum detectable velocity, the target is not detected by the sensor. Under these conditions, the use of an estimator, which does not take care of this move-stop-move motion explicitly, will result in broken tracks. The tracker proposed here handles the evasive move-stop-move motion via the VS-IMM estimator, where the tracker mode set is augmented with a "stopped-target" model when the estimated speed of the target falls below a certain threshold. Using this additional stopped-target model, the target track is kept "alive" even in the absence of a measurement. A simulated scenario is used to illustrate the selection of design parameters and the operation of the tracker. Performance measures are presented to contrast the benefits of the VS-IMM estimator, which uses the stopped-target model, over a standard IMM estimator.
Keywords :
airborne radar; radar tracking; target tracking; GMTI radar; VS-IMM Estimator; airborne sensor; evasive ground target tracking; ground moving target indicator; move-stop-move motion; stopped-target model; variable structure interacting multiple model; Airborne radar; Covariance matrix; Gaussian noise; Motion estimation; Noise measurement; Position measurement; Radar detection; Radar tracking; Target tracking; Time measurement;
fLanguage :
English
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9251
Type :
jour
DOI :
10.1109/TAES.2003.1238762
Filename :
1238762
Link To Document :
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