Maneuvering emitter tracking by a single observer using IMM algorithm based on unscented transformation

The unscented transformation (UT) based interacting multiple model (IMM) algorithm is explored to handle maneuvering emitter tracking by a single passive observer, which processes Doppler frequency changing rate and angle measurements concurrently, thus the observer maneuver is not required. Computer simulations are performed to compare the unscented Kalman filter-interacting multiple model (UKF-IMM) estimator with the traditional extended Kalman filter-interacting multiple model (EKF-IMM) estimator. Simulation results reveal that the UKF-IMM estimator is more stable and effective