多源场景下的无源雷达联合杂波对消技术  

Joint Clutter Cancellation Technology of Passive Radar in Multi-Source Scene

作　　者：孙正豪 吕晓德 刘忠胜[1,2] 刘平羽 SUN Zhenghao;LYU Xiaode;LIU Zhongsheng;LIU Pingyu(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;National Key Laboratory of Microwave Imaging Technology,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]微波成像技术国家重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《雷达科学与技术》2021年第1期55-62,68,共9页Radar Science and Technology

基　　金：国家重点实验室基金资助项目(No.Y8M3210380)。

摘　　要：针对基于LTE信号的无源雷达杂波对消,由于存在多个同频基站干扰信号,传统的杂波对消方法,即一一对消,滤波器权值收敛误差大,影响杂波对消性能。本文提出了一种基于联合处理模型的杂波对消算法。该算法将多个同频基站信号作为输入,基于LMS算法同时对消所有信号源的直达波和多径杂波;进而通过分块处理减少了迭代次数,可同时在块内利用FFT快速实现,有效减少了计算复杂度。通过仿真分析,验证了算法能够有效避免收敛误差大的问题,为基于LTE信号的无源雷达信号杂波处理提供了新的途径。For clutter cancelling of passive radar based on LTE signals,the traditional clutter cancellation method is incompetent due to its large filter weight convergence error stemmed from the existence of multiple co-channel base station signals.A novel joint processing algorithm is proposed for clutter cancelling,in which multiple co-channel signals are used as the input signal.The direct waves and multipath clutters of all illuminators are eliminated by LMS(least mean square)algorithm simultaneously.Moreover,the number of iterations is reduced by block processing and FFT can be employed to minimize the computational complexity.As demonstrated by simulation results,the proposed algorithm avoids the problem of large convergence error effectively,which provides a new solution for signal processing of passive radar based on LTE signal.

关 键 词：无源雷达 LTE信号 同频干扰 联合杂波对消 频域分块 

分 类 号：TN958.97[电子电信—信号与信息处理]