多频段外辐射源无人机检测实验研究  

Experimental Research on Multi-frequency External Emitter UAV Detection

作　　者：梁文斌[1] 谢跃雷[1,2] LIANG Wen-bin;XIE Yue-lei(School of Information and Communication Engineering,Guilin University of Electronic Technology,Guilin 541004,China;National and Local Joint Engineering Research Centre for Satellite Navigation,Positioning and Location Services,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004 [2]卫星导航定位与位置服务国家地方联合工程研究中心,桂林541004

出　　处：《科学技术与工程》2023年第28期12128-12135,共8页Science Technology and Engineering

基　　金：广西科技重大专项(桂科AA21077008)。

摘　　要：近年来,基于无源双基地雷达的无人机(unmanned aerial vehicle,UAV)检测手段一直受到中外研究人员的广泛关注,但常规双基地雷达的无人机检测方法需要作参考信号重构和杂波抑制等手段,使得检测算法较为复杂。基于循环谱的检测算法在不经信号重构和杂波抑制下,利用外辐射源雷达的循环平稳特性和循环谱的强抗噪性,可直接提取到旋翼无人机的微动特征。但该方法使用单频外辐射源雷达,在检测的稳定性和连续性上,由于受到目标距离、俯仰角度等因素的影响而显得力不从心,且检测精度不高。从外辐射源信号的循环平稳特性出发,提出基于多频段外辐射源雷达的无人机检测方法。实测实验表明:使用多频段外辐射源检测时无人机回波信号的循环谱等高图识别率要高于单频段外辐射源雷达,多频联合处理能使检测性能更加平稳。Researchers both domestically and internationally have recently become increasingly interested in unmanned aerial vehicle(UAV)detection methods based on passive bistatic radar,but these methods typically require reference signal reconstruction,clutter suppression,and other techniques,which complicates the detection algorithm.By utilizing the cyclostationary character of the external radiation source radar and the strong noise immunity of the cyclic spectrum,the detection algorithm based on cyclic spectrum can directly extract the micro-motion characteristics of the rotorcraft UAV without signal reconstruction and clutter suppression.Nevertheless,the technique makes use of a single-frequency external radiation source radar,which has a low level of detection accuracy and weak stability and continuity of detection due to the influence of target distance and pitch angle.The cyclostationary character of the external radiation source signal were used to present a UAV detection method based on multi-frequency external radiation source radar.The measured experiments demonstrate that the multi-frequency external radiation source detection recognition rate of the cyclic spectrum contour map of the UAV echo signal is higher than the single-frequency external radiation source radar,and the combined multifrequency processing can improve the detection performance.

关 键 词：无人机(UAV) 微动特征 循环平稳 外辐射源雷达 多频段 

分 类 号：TN958[电子电信—信号与信息处理] V279[电子电信—信息与通信工程]