Ground Target Filtering Method Based on Doppler Features

The ground target filtering is an important part of track optimization of airborne early warning radar. It can improve target track quality effectively. Aiming at ground target filtering problem, a ground target and air target identification method based on Doppler feature was proposed. First, on the basis of traffic modeling and simulation, the Doppler feature of freeway target echo signals in the presence of ground clutter was analyzed, and then a classification rule based on differences of Doppler feature between ground targets and air targets was designed. The simulation results show that the classification rule has high identification probability of ground targets and high identification probability of air targets. Accordingly, the method can filter most of freeway targets effectively.