基于自适应多普勒滤波的雷达欺骗干扰抑制

Radar Deception Jamming Suppression Based on Adaptive Doppler Filtering

为了应对现代干扰机密集相干假目标的威胁,以线性调频雷达抗灵巧噪声和C&I干扰为背景进行研究。首先,提出基于YOLOv5的复合干扰距离-多普勒域分布特征提取和干扰识别的干扰参数初步估计方法;然后,综合特征区域搜索和频谱内插等方法对多普勒参数进行精确估计,利用提取到的精确参数设计多普勒滤波器组对干扰进行抑制;最后,利用抑制后的信号构建检验统计量,利用方差检验判断是否需要更新多普勒滤波器权重,进行自适应调节。仿真结果表明,所提方法可以在低信噪比和多欺骗干扰的环境下对干扰进行有效抑制,对密集假目标干扰的抑制具有参考意义。

In order to cope with the threat of dense coherent false targets of modern interferers,this paper takes linear FM radar against dexterous noise and C&I interference as the background.Firstly,a preliminary estimation method of interference parameters based on YOLOv5 for composite interference range-Doppler domain distribution feature extraction and interference recognition is proposed.Then,the Doppler parameters are accurately estimated by using the methods of feature region search and spectrum interpolation.The extracted accurate parameters are used to design Doppler filter banks to suppress the interference.Finally,the test statistic is constructed by using the suppressed signal,and the variance test is used to determine whether the Doppler filter weight needs to be updated for adaptive adjustment.The simulation results show that the proposed method can effectively suppress the interference in the environment of low SNR and multiple deception jamming.The study has reference significance for the suppression of dense false target interference.