无源雷达系统中动目标检测方法研究

Research of Moving Target Detection Method in Passive Radar System

针对无源雷达系统中,直达波及多径信号严重影响雷达对运动目标的探测性能这一问题;根据回波通道中的接收数据的能量大小关系,提出了一种基于自适应次分量提取的回波信号提取算法,该算法根据接收数据中的回波信号能量小且有频移的特点对回波信号进行提取;仿真结果表明:该算法可以在强直达波和多径信号干扰中对回波信号进行有效的提取,相似系数达到0.98,检测性能好,精度高,且操作简单易行。

Aiming at the problem of the direct-path-wave and the multi-path signals influence the performance of the moving target detection seriously in passive radar system, according to the energy relations of the receiving data from the echo channel, a extraction algo- rithm of echo signal based on adaptive minor components extraction was proposed. The algorithm extract the echo signal, according to the echo signal has the minimum energy and the Doppler shift, simulation resfilts show that the algorithm can extract the echo signal effectively in the interference of the direct--path--wave and the multi--path signals, the similarity coefficient is 0. 98, has the high accuracy , the de- tection of the performance is good, the simple operation and easy.