吕晓德^{1, 2},
张汉良^{1, 2, 3,,},
刘忠胜^{1, 2},
孙正豪^{1, 2, 3},
刘平羽^{1, 2, 3}
1.中国科学院电子学研究所 ??北京 ??100190
2.微波成像技术国家级重点实验室 ??北京 ??100190
3.中国科学院大学 ??北京 ??100049

详细信息

作者简介:吕晓德：男，1969年生，研究员，研究方向为基于阵列技术的的新体制雷达系统及其应用
张汉良：男，1993年生，硕士生，研究方向为基于LTE信号的无源雷达信号处理
孙正豪：男，1994年生，硕士生，研究方向为无源雷达信号处理
刘平羽：男，1994年生，硕士生，研究方向为无源雷达信号处理

通讯作者:张汉良　zhanghanliang16@mails.ucas.ac.cn

中图分类号:TN958.97

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出版历程

收稿日期:2018-09-20
修回日期:2019-02-25
网络出版日期:2019-03-14
刊出日期:2019-09-10

Research on Co-channel Base Station Interference Suppression Method of Passive Radar Based on LTE Signal

Xiaode Lü^{1, 2},
Hanliang ZHANG^{1, 2, 3,,},
Zhongsheng LIU^{1, 2},
Zhenghao SUN^{1, 2, 3},
Pingyu LIU^{1, 2, 3}
1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
2. National Key Laboratory of Science and Technology on Microwave Imaging, Beijing 100190, China
3. University of Chinese Academy of Sciences, Beijing 100049, China


摘要
摘要:针对基于LTE信号的外辐射源雷达接收信号包含多个同频发射基站的直达波和多径杂波干扰的问题，该文对传统的外辐射源雷达信号处理流程进行了改进，增加了对同频基站干扰的处理步骤，提出了一种基于卷积混合模型的盲源分离算法来抑制同频基站的杂波干扰。假设混合矩阵是一个矢量线性时不变滤波器矩阵，以互信息为代价函数，通过求取互信息的梯度，用最速下降法进行迭代，分离准则是使分离后的信号之间互信息最小化。仿真表明，该文算法能够有效地抑制LTE信号同频发射基站的杂波干扰，为后续的主基站杂波对消处理提供了基础。
关键词:外辐射源雷达/
LTE信号/
同频干扰抑制/
盲源分离
Abstract:For the passive radar based on LTE signal, the received signal contains direct-path and multipath clutters interference of multiple co-channel base station, and the traditional passive radar signal processing flow is improved, and the processing steps of co-channel base station interference are added. A blind source separation algorithm based on convolutive mixtures is proposed. The algorithm can suppress the clutters interference of co-channel base station. It is assumed that the mixing matrix is a vector linear time-invariant filter matrix. The mutual information is used as a cost function. By finding the gradient of mutual information, it is iterated by the steepest descent method. The separation criterion is to minimize the mutual information between the separated signals. The simulation results show that the proposed algorithm can effectively suppress the clutters interference of the LTE signal co-channel base station, and provide a basis for the subsequent clutters cancellation processing of the main base station.
Key words:Passive radar/
Long Term Evolution(LTE) signal/
Co-channel interference suppression/
Blind source separation



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