多频外辐射源雷达无人机探测实验研究

Experimental Research on UAV Detection Using Multi-Frequency Passive Radar

外辐射源雷达作为一种新兴的无人机监视手段近年来得到了广泛关注。常规的单频外辐射源雷达容易受无人机飞行姿态、观测角度等因素影响,在探测稳定性和跟踪连续性上表现不足。多频探测对缓解目标RCS起伏,提高雷达探测性能具有重要的意义,是外辐射源雷达的发展方向之一。本文从目标散射特性的角度论述了多频探测的重要性,首先分析并仿真了照射源频率对无人机RCS的影响,然后提出了针对数字电视外辐射源雷达无人机探测的多频检测方法。仿真与实测结果表明,使用不同频率照射源探测时无人机的RCS和信噪比有明显差异,多频联合处理能使目标信噪比更加平稳。研究成果为外辐射源雷达向多频融合发展提供了参考依据。

Passive radar,as a new surveillance method for UAV,has been widely discussed in recent years.Conventional single-frequency passive radar is vulnerable to the UAV's flight attitude,observation angle and other factors,which shows inadequate detection stability and tracking continuity.Multi-frequency detection,one of the development directions of passive radar,is of great significance for overcoming the target's RCS fluctuation and improving the detection probability.This paper discusses the importance of multi-frequency detection from the perspective of scattering characteristics.Firstly,the influence of radiation source frequency on UAV's RCS is analyzed and simulated.Then,a multi-frequency detection method for UAV detection with digital TV passive radar is proposed.The simulation and measured results show that the echo characteristics of UAV are significantly different when using different frequency illumination sources.Multi-frequency fusion can achieve frequency complementarity and make the target SNR more stable.The research results provide a reference for the development of passive radar to multi-frequency fusion.