基于快时间序列STAP的机载阵列雷达主瓣干扰抑制方法

An Algorithm of Mainbeam Jam Rejecting Based on Fast-time Sequence STAP

机载阵列雷达可通过传统空时二维自适应处理方法(STAP)处理方式在空域抑制副瓣干扰信号,但当目标和干扰角度一致时,传统STAP方法无法有效抑制此类主瓣干扰。通常,电子战天线的干扰波束宽度较宽,干扰信号经地面反射后可形成多径信号进入雷达波束,利用直达干扰信号与多径干扰信号的相关性可有效抑制主瓣干扰信号,提高目标信号的检测概率。仿真和实测数据表明了该方法的有效性。

space-time adaptive processing(STAP) is commonly used to suppress the sidebeam jam for air-borne array radar. However, it doesn′t work for mainbeam jam which has same angle direction with the target. In fact, wider beam mainbeam angle of the air-borne jammer would produce several multi-path signals, with these additional jam signal information in different ranges, so the main-lobe jam can be rejected effectively with the correlation between direct jam and multi-path jam. The effective of the proposed algorithm is verified with the simulated data as well as the measured data.