基于参数化正交匹配追踪算法的高分辨雷达距离像重构  

High-resolution radar range image reconstruction based on parameterized orthogonal matching pursuit algorithm

作　　者：陈一畅 贾航川 孙永健[1] 文佳豪 CHEN Yichang;JIA Hangchuan;SUN Yongjian;WEN Jiahao(Air Force EarlyWarning Academy,Wuhan 430019,China;No.94028 Unit,the PLA,Xianyang 712201,China)

机构地区：[1]空军预警学院,武汉430019 [2]94028部队,陕西咸阳712201

出　　处：《空天预警研究学报》2024年第5期313-317,共5页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

基　　金：国家自然科学基金项目(61901514)。

摘　　要：雷达线性调频信号调频率误差会导致传统匹配滤波模型失配,显著降低一维距离像成像效果.针对调频率误差模型下的宽带雷达高分辨一维距离像稀疏成像问题,提出了一种基于参数化正交匹配追踪算法的高分辨雷达一维成像方法.该方法首先确定调频率参数取值范围,构建调频率参数可选集合;然后基于回波数据观测矩阵与调频率的解析关系,针对每一个可选值构建参数化的稀疏观测矩阵,并进行单步正交匹配追踪迭代;最后基于每一个参数可选值对应的单步残差能量逐步筛选出调频率参数.仿真和实测数据实验验证了所提方法的有效性.The frequency modulation rate error of radar linear frequency modulation(LFM)signal will lead to the mismatch of traditional matched filtering model,which significantly reduces the imaging effect of one-dimensional range profile.Aiming at the sparse imaging problem of high-resolution one-dimensional range profile of wideband radar under the chirp rate error model,this paper proposes a high-resolution radar one-dimensional imaging method based on parameterized orthogonal matching pursuit algorithm.First,the method is used to determine the range of frequency modulation parameters,and construct an optional set of frequency modulation param-eters.Then,based on the analytic relationship between the observation matrix of echo data and the frequency modulation rate,a parameterized sparse observation matrix is constructed for each optional value,and a one-step orthogonal matching pursuit iteration is performed.Finally,the frequency modulation rate parameters are gradually screened out based on the residual energy of the single step residual corresponding to the optional value of each parameter.The effectiveness of the proposed method is verified by simulation and experimental data.

关 键 词：雷达高分辨成像 参数化稀疏表征 参数化正交匹配追踪 稀疏重构 

分 类 号：TN957.52[电子电信—信号与信息处理]