An adaptive tracking filter controlling sampling frequency

A new approach to tracking a target is presented. This approach introduces adaptability of sampling frequency into a tracking filter. A target flies mainly a constant-velocity, straight-line trajectory, and at times it maneuvers. The proposed filter adaptively controls its sampling frequency as well as weight of filtering according to the target's motion. When the target flies a constant-velocity, straight-line trajectory, the proposed filter operates heavily filtering at low sampling frequency in order to curtail the sampling. On the other hand, when the target maneuvers, it filters lightly at high sampling frequency in order to make up for the lack of information and to maintain the accurate track. Consequently, the proposed tracking filter guarantees the accuracy of tracking besides curtails sampling.