High Range Resolution Radar Target Feature Extraction Parameters

Some specific techniques for ATR by a high range resolution radar are researched in feature extraction, which are parts of a project—"Search into Method for HRR Radar Target Feature Extraction Based on Geometrical Theory of Diffraction" supported by National Science Foundation of China.At the beginning, the thesis makes a brief introduction to the development of radar target recognition technique, and feature extraction is the pivotal point. Then the follow two chapters study Relax algorithm and Matching Pursuit algorithm. The parameters extracted by Relax algorithm are correct and dependable, but the geometrical information included in the high range resolution profile has not been utilized by Relax algorithm because Relax algorithm is based on simple scattering-centers model. Matching Pursuit algorithm is simple, however, the choice of over-complete dictionary is very difficult, and it has enormous calculation due to its greedy iterative algorithm.So, in order to fully utilize the geometrical information included in the scattering points, and to avoid the difficulty of the choice of basis in Matching Pursuit algorithm, the thesis put forward a new method of feature extraction based on Geometrical Theory of Diffraction model to extract the geometrical parameter of the scattering centers except the intensity and position parameters. In the end, simulation results of the proposed algorithm are given.