非均匀地杂波背景下自适应动目标检测

Adaptive Moving Target Detection in Nonhomogeneous Ground Clutter Background

针对非均匀地杂波背景,提出了一种基于地杂波强度估计的自适应动目标(MTD)检测方法。该方法预先设计具有不同地杂波抑制能力的多组滤波器组,实时处理过程中利用零速滤波器输出数据估计地杂波强度信息,并基于地杂波强度估计值自适应选择抑制能力合适的滤波器组。与采用单一多普勒滤波器组的传统MTD方法相比,该方法提升了雷达在非均匀地杂波背景下检测低频点目标的能力。最后,通过仿真试验验证了该方法的有效性。

Aimed at the nonhomogeneous ground clutter background, an adaptive moving target detection （MTD） method based on the ground clutter level estimation is proposed. Multi filter groups with the different ground clutter rejection capabilities are predesigned, the ground clutter strength information is estimated by the output data of the zero speed filter, and the appropriate filter group is adaptively chosen based on the ground clutter strength estimated value. Compared with the traditional MTD method by the single Doppler filter, the method can improve the detect ability of the radar at the low frequent targets in the nonhomogeneous ground clutter back ground. Finally, the validity of the method is verified by the simulation experiment.