Generalized Space- Time Adaptive Monopulse Angle Estimation Approach

For airborne radar, Space-time adaptive processing (STAP) is the key technique to suppress both clutter and interference and detect moving target in strong ground clutter. Monopulse technique after STAP is used to estimate target angle. However, with this adaptive processing, the typical monopulse technique is no more effective because the main beams are distorted, that may lead to angle errors. This paper is concerned with the main beam distortion that results from clutter suppression by STAP. Generalized monopulse is extended to a space-time adaptive architecture to improve the accuracy of angle estimation. Simulation results show that performance of the proposed method is superior to that of the typical method.