基于在零陷对准干扰信号的情况下，零陷过深导致主瓣展宽、副瓣较高，使得主波束形状不佳等问题，提出了一种改进算法，该算法可以在准确抑制干扰信号的同时保持良好的主波束形状及副瓣电平；同时提出了原算法对干扰来向误差较为敏感的改进办法。计算机仿真结果证明了新算法的有效性。

A new beamformer using null preprocessing base d on known interference direction is presented in this paper,which utilizes the te chniques of null preprocessing and low sidelobe DBF. The advantages of the beamf ormer are that it has stronger ability to reshape the beam with low sidelobe lev el while maintatin a good performance of jammer suppression by setting nulls on the DOA of interferences. On the other hand ,the algorithm adopts the idea of ad ding jams artificially near the jammer to solve the problem that its output SINR is sensitive to the error of the DOA of jammers.The computer simulations demons trate the effectiveness of the proposed method.

TN959