A Coherent Weak Target DOA Estimation Method Based on Target Features

Conventional beamforming has become a classic algorithm for target detection because of its good tolerance, but the disadvantage is that its resolution is low and it cannot distinguish weak target signals well. The commonly used minimum variance distortion-free response (MVDR) algorithm is a classic high-resolution beamforming algorithm, but it cannot effectively resolve coherent signals, especially coherent weak target signals[1]. In this paper, a new DOA estimation method for coherent weak targets detection based on target features is proposed to solve the problems above.