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Best linear unbiased filtering with nonlinear measurements for target tracking

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3 Author(s)
Zhanlue Zhao ; New Orleans Univ., LA, USA ; Li, X.R. ; Jilkov, V.P.

In tracking applications, target dynamics are usually modeled in the Cartesian coordinates, while target measurements are directly available in the original sensor coordinates. Measurement conversion is widely used such that the Kalman filter can be applied in the Cartesian coordinates. A number of improved measurement-conversion techniques have been proposed recently. However, they have fundamental limitations, resulting in performance degradation, as pointed out in a recent survey conducted by the authors. A filter is proposed here that is theoretically optimal in the sense of minimizing the mean-square error among all linear unbiased filters in the Cartesian coordinates. The proposed filter is free of the fundamental limitations of the measurement-conversion approach. Results of an approximate, recursive implementation are compared with those obtained by two state-of-the-art conversion techniques. Simulation results are provided.

Published in:

Aerospace and Electronic Systems, IEEE Transactions on  (Volume:40 ,  Issue: 4 )