基于稀疏重构理论的雷达多径信号参数估计法  

Parameter Estimation of Radar Mulipath Signal Based on Sparse Reconstruction Theory

作　　者：薛坚 刘乐[2] 桂佑林 张兴敢[1] XUE Jian;LIU Le;GUI Youlin;ZHANG Xinggan(School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China;Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)

机构地区：[1]南京大学电子科学与工程学院,南京210023 [2]南京电子技术研究所,南京210039

出　　处：《现代雷达》2022年第3期46-51,共6页Modern Radar

基　　金：国家自然科学基金资助项目(61976113)。

摘　　要：针对电子侦察系统中多径效应导致雷达辐射源信号参数测量性能下降问题,提出了一种基于稀疏重构理论的雷达多径信号参数估计方法。该方法首先建立了多径信号的传输模型,然后分析了多径信号稀疏表示的可行性,着重论述了基于稀疏分解和信号重构的多径分量参数估计方法,最后进行了仿真实验。实验结果验证了文中方法的有效性,与传统方法相比,该方法具有较高的估算精度和较高的时延分辨率,文中的参数估计模型适用于各种调制信号。Aiming at the influence of the multipath effect on the measurement of the emitter parameter in electronic reconnaissance system, a new parameter estimation method of multipath radar signal based on sparse reconstruction theory is proposed. Firstly the model of multipath transmission of radar signal is constructed. Then the feasibility of sparse representation for multipath signal is analyzed, and the sparse representation and signal reconstruction algorithm for multipath parameter estimation are discussed. Finally simulation experiment is carried out. Simulation results validate the validity of the proposed method. Comparing with the traditional method, this method has higher estimation accuracy and higher time-delay resolution, and the parameter estimation model in this paper is insensitive for modulation signals changed.

关 键 词：稀疏重构 电子侦察 多径效应 参数估计 时延分辨率 

分 类 号：TN971[电子电信—信号与信息处理]