机载火控雷达地面慢动目标检测方法研究

Detection of ground slowly moving target through airborne fire-control radar

针对地面慢动目标检测困难的特点,提出了一种适用于单通道机载火控雷达的先滤波后自适应处理的方法。该方法先对雷达和路接收数据进行多次滑窗、时域多普勒滤波,然后按照线性约束准则对相同多普勒通道数据进行自适应处理。实测数据处理结果表明,该方法能有效抑制旁瓣杂波和部分主瓣杂波,从而提高了地面慢速目标的检测性能。

Considering the problem that is difficult to detect the slowly moving target on the ground, we proposed a＂ filter-then-adapt＂ method for single channel airborne fire-control radar. The method processes sliding windows to the returns from sum channel at first, and transforms the data into Doppler domain, then processes the data of the same Doppler bin based on LCMV adaptively. Test results with real data showed that this method can suppress the sideband clutter and some of the mainlobe clutter effectively, and thus can greatly improve the performance for detecting the slowly-moving target on the ground.