This paper presents a target altitude estimation approach based on multipath detections with range and range rate information from a 2D airborne radar. Using multipath detections has to deal with the following challenges: 1) Low probability of detection of the indirect path signal reflected by the sea surface; 2) Lack of an analytical expression for the relationship between the target state and the indirect path measurements over spherical Earth; 3) Unknown range measurement error standard deviation for the indirect path signal. Two estimators are developed: an adaptive multiple model iterated least squares (AMM-ILS) estimator for motion parameter estimation (noiseless target motion) and an AMM unscented Kalman filter (AMM-UKF) for dynamic state estimation (noisy target motion). The resulting altitude estimates from a 2D radar are compared to a 3D radar with range and elevation measurements. The simulation results show that the 2D radar provides better target altitude estimation accuracy than the 3D radar.
Comparison of altitude estimation using 2D and 3D radars over spherical earth
2016-03-01
404227 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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