关键词: 空时自适应处理, 预滤波, 杂波抑制

Abstract:

The twodimensional pulsetopulse canceller (TDPC) of ground clutter can effectively prefilter the clutter along the clutter trace and enhance the moving target's detectability of the following spacetime adaptive processing algorithms.However,the inaccurate radar system parameters,especially the airborne velocity and drift angel,will constrain the TDPC's clutter suppression ability.To solve this problem,a robust twodimensional pulsetopulse canceller (RTDPC) of ground clutter is proposed,in which the errors of the airborne velocity and drift angel are taken as the priori knowledge and added into the design of filtering coefficient matrix.The simulated and MCARM real data are utilized to verify the validity of the proposed method.The experimental results show that the clutter suppression performance of RTDPC can be improved compared with the TDPC under the condition for inaccurate airborne velocity and drift angle.The moving target detectability of following spacetime adaptive processing algorithms is also enhanced after RTDPC is used as a prefilter.

Key words: spacetime adaptive processing (STAP);prefilter;clutter suppression