Monopulse angle estimation with constrained adaptive beamforming using simple mainlobe maintenance technique

A new monopulse radar system is proposed to overcome the difficulties with conventional monopulse techniques under jamming conditions. The proposed system uses a simple mainlobe maintenance technique based on the estimated direction of the mainlobe jammer. Thereafter, an adaptive array is used to create pattern nulls in the incoming directions of jammers, while maintaining the shape of the mainlobe. As a result, the proposed system can track the target angle without any correction of the adaptive sum and difference beam outputs.