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arXiv 2102.11954eess.SP
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基于雷达散射截面的微波频段无人机统计识别

Radar Cross Section Based Statistical Recognition of UAVs at Microwave Frequencies

Martins Ezuma, Chethan Kumar Anjinappa, Mark Funderburk, Ismail Guvenc

摘要:

提出了一种基于雷达散射截面(RCS)的微波频段无人机(UAV)统计识别系统。首先,本文介绍了在小型电波暗室中测量6架商用无人机在15 GHz和25 GHz频段的垂直(VV)和水平(HH)极化RCS的结果。测量结果表明,无人机的平均RCS与目标无人机的形状、尺寸、材料组成以及照射雷达的方位角、频率和极化方式有关。然后,通过将RCS测量数据拟合到11个不同的统计模型来实现目标无人机的雷达表征。从模型选择分析,我们观察到对数正态分布,广义极值,伽玛分布是最适合建模的商用无人机的RCS,而高斯分布表现相对较差。最好的无人机雷达统计数据形成了所提出的无人机统计识别系统的类别条件概率密度。利用蒙特卡罗分析方法对不同信噪比下的无人机统计识别系统性能进行了评估。在SNR为10 dB时,可实现97.43%或更高的平均分类准确度。

英文摘要:

This paper presents a radar cross-section (RCS)-based statistical recognition system for identifying/ classifying unmanned aerial vehicles (UAVs) at microwave frequencies. First, the paper presents the results of the vertical (VV) and horizontal (HH) polarization RCS measurement of six commercial UAVs at 15 GHz and 25 GHz in a compact range anechoic chamber. The measurement results show that the average RCS of the UAVs depends on shape, size, material composition of the target UAV as well as the azimuth angle, frequency, and polarization of the illuminating radar. Afterward, radar characterization of the target UAVs is achieved by fitting the RCS measurement data to 11 different statistical models. From the model selection analysis, we observe that the lognormal, generalized extreme value, and gamma distributions are most suitable for modeling the RCS of the commercial UAVs while the Gaussian distribution performed relatively poorly. The best UAV radar statistics forms the class conditional probability densities for the proposed UAV statistical recognition system. The performance of the UAV statistical recognition system is evaluated at different signal noise ratio (SNR) with the aid of Monte Carlo analysis. At an SNR of 10 dB, the average classification accuracy of 97.43% or better is achievable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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