A 3-D electromagnetic-model-based algorithm for high-resolution range profile motion compensation

By utilizing a stepped-frequency wideband radar, high-resolution range profiles (HRRPs) of a target can be obtained. However, due to the high speed of a flying projectile, there are severe distortions on its HRRPs. These distortions, if ignored, will greatly degrade the performance of the pose estimation. In this paper, a method for HRRP motion compensation based on the three dimensional electromagnetic-model (3-D em-model) is proposed. The 3-D em-model is established offline based on the geometric structure of the target. By matching the HRRPs of measurements and HRRPs generated from the 3-D em-model, both motion compensation and pose estimation can be accomplished simultaneously. Experiments using the data predicted by a high-frequency electromagnetic code verify the validity of the proposed method.