Adaptive tracking of group targets using random matrix

摘要

Adaptive tracking method of group targets using random matrix based on the current statistical model (CS) is presented in order to improve tracking performance of group targets in strong manoeuvring and high measurement error. In the estimation of group centroid, a bell-shape function is utilised as fuzzy membership function to adjust the maximum acceleration which can modify the process noise variance adaptively. The introduction of strong tracking filter with multiple suboptimal fading factors adjusts error covariance of predicted group centroid state adaptively when group targets manoeuvre strongly. In the estimation of group extension, the measurement accuracy is considered in the extended state estimation where the likelihood function is formatted with extended state and measurement error covariance which is calculated by the innovation and adaptive fading memory updated in iterative process. The simulation results show that the method presented in the paper achieves better tracking performance of group targets in strong manoeuvring and high measurement error compared with the existing methods.