Monopulse estimation with multipoint constrained adaptation in mainlobe jamming

The conventional adaptive beamforming will lead to a severe distortion of monopulse ratio curve in the presence of mainlobe jamming(MLJ), which results in a failure of angle estimation and tacking of a target. An adaptive algorithm based on multipoint constraint is presented in this paper. This technique can suppress the MLJ while maintaining monopulse ratio undistorted, which greatly improves the performance of angular estimation.