机载前向阵雷达近程地面目标检测  

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

作　　者：曹建蜀[1] 汪学刚[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都610054

出　　处：《信号处理》2007年第3期379-382,共4页Journal of Signal Processing

摘　　要：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。A method based on ground clutter property is presented, which is applied to detect the ground short-range target for airborne forward-looking arrays. The method comprises a pre-processing with Doppler frequency-shift compensation, a two-stage reducedrank 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 implement the constant false alarming rate （CFAR） detection with substantially lower computational complexity while attaining the same performance as the GLRT. It results in the significant computational saving. Simulations show that the method is high efficient for the detection of the ground short-range target.

关 键 词：机载前向阵雷达 空时二维自适应处理 杂波抑制 恒虚警检测 多级维纳滤波器 

分 类 号：TN957.51[电子电信—信号与信息处理]