基于压缩感知的频率捷变雷达切片干扰抑制技术研究  

Research on Slice Jamming Suppression Technology Based on Compressed Sensing for Frequency-agile Radar

作　　者：刘尚 蒋金华 李麒麟 LIU Shang;JIANG Jinhua;LI Qilin(Jiangnan Institute of Mechanical and Electrical Design,Guiyang 550009)

机构地区：[1]江南机电设计研究所,贵阳550009

出　　处：《火控雷达技术》2023年第1期9-14,共6页Fire Control Radar Technology

基　　金：国防基础科研项目(0420132104)。

摘　　要：近些年各军事强国在战略、战术和技术上对电子战高度重视,干扰手段和干扰技术飞速发展,我方雷达探测装备在实战中面临着日益复杂的电磁干扰环境。本文主要针对雷达抗干扰的设计需求,将稀疏恢复技术与频率捷变信息处理技术相结合,基于压缩感知理论稀疏恢复算法开展技术研究。首先,通过建立时-频域捷变目标回波模型,将观测区域内的目标散射点的距离和速度离散化为多个二维分辨单元,将分辨单元里的散射点强度作为原始信号,而将观测采样矩阵的每一列作为对应单位强度散射点的回波向量。然后,利用贪婪追踪算法完成稀疏恢复。最后,通过仿真结果表明基于稀疏恢复的捷变雷达信息处理方法具有较好的目标分辨能力,可在较高的干信比下完成切片干扰的抑制,验证了该方法的可行性及有效性。In recent years,military powers have attached great importance to electronic warfare at strategy,tactics and technology levels.With the rapid development of jamming means and jamming technology,our radar detection equipment is facing increasingly complex electromagnetic jamming environment in actual combat.To satisfy the requirements of radar anti-jamming design,this paper combines compressed sensing-based sparse recovery technology and frequency-agile information processing technology.Firstly,a time-frequency domain agile target echo model is established to discretize the range and velocity of target scattering points in the observation area into multiple two-dimensional resolution cells.The intensity of scattering points in the resolution cells is used as the original signal,and each column of the observation sampling matrix is used as the echo vector of matching scattering points with unit intensity.Then,the greedy pursuit algorithm is used to complete sparse recovery.Finally,the simulation results show that the agile radar information processing method based on sparse recovery has high target resolution capability and can suppress slice jamming under high interference-to-signal ratio.Therefore,the feasibility and effectiveness of the proposed method is verified.

关 键 词：压缩感知 稀疏恢复 正交匹配追踪算法 频率捷变 切片转发干扰 

分 类 号：TN958[电子电信—信号与信息处理]