Experimental Research of Multi-FM Based Passive Radar

In recent years, the demand for low-altitude surveillance has increased dramatically, and passive radar has received more and more attentions. In this experimental research, we develop a multi-FM based passive radar system in Wuhan University. It is demonstrated that the digital beamforming (DBF) method can be used to simultaneously extract direct waves from different orientations as reference signals. Using this technique, we achieve multi-FM channel joint detection without increasing the complexity of the hardware system, which improves the detection stability of FM based passive radar.