机载前向阵雷达近程地面目标检测

根据地杂波谱特点,本文提出了一种前向阵近程地面目标检测方法。该方法由频移补偿预处理、二级降维(3DT-SAP级联多级维纳滤波器(MWF))空时自适应滤波、两步广义似然比检验(GLRT)组成。其中,3DT-SAP级联MWF方法不仅本身能以低的计算代价实现杂波的有效抑制,而且能使两步GLRT方法通过极少量的计算完成与GLRT方法性能相同的恒虚警检测,降低了计算总量。仿真表明,此系统方法能够有效检测出前向阵近程地面目标。

Ground Short-Range Target Detection for Airborne Forward-Looking Radar

A method based on ground clutter property is presented,which is applied to detect the ground short-range target for air- borne forward-looking arrays.The method comprises a pre-processing with Doppler frequency-shift compensation,a two-stage reduced- rank space time adaptive processing (STAP) approach consisting of an initial 3DT-SAP followed by a multistage Winner filter (MWF), and a two-step generalized likelihood ratio test (GLRT).For the method,it is attractive that the two-stage reduced-rank STAP can not only provides the efficient suppression for clutter interference with low computational cost,but also support the two-step GLRT to imple- ment the constant false alarming rate (CFAR) detection with substantially lower computational complexity while attaining the same per- formance as the GLRT.It results in the significant computational saving.Simulations show that the method is high efficient for the detec- tion of the ground short-range target.