吕晓德^{1, 2},
孙正豪^{1, 2, 3,,},
刘忠胜^{1, 2},
张汉良^{1, 2, 3},
刘平羽^{1, 2, 3}
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
孙正豪：男，1995年生，硕士生，研究方向为无源雷达信号处理
刘忠胜：男，1977年生，副研究员，研究方向为干涉SAR信号处理
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
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:孙正豪　sunzhenghao17@mails.ucas.ac.cn

中图分类号:TN958.97

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被引次数:0

出版历程

收稿日期:2019-03-25
修回日期:2019-11-25
网络出版日期:2019-12-14
刊出日期:2020-06-04

Research on Suppressing Co-channel Interference of Passive Radar Based on Blind Source Separation Using Second Order Statistics

Xiaode Lü^{1, 2},
Zhenghao SUN^{1, 2, 3,,},
Zhongsheng LIU^{1, 2},
Hanliang ZHANG^{1, 2, 3},
Pingyu LIU^{1, 2, 3}
1. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
2. National Key Lab of Microwave Imaging Technology, Beijing 100190, China
3. University of Chinese Academy of Sciences, Beijing 100049, China


摘要
摘要:针对基于长期演进(LTE)信号的无源雷达存在同频基站干扰的问题，该文提出一种基于2阶统计量的盲源分离算法，该算法是在卷积混合模型下，通过多通道最小均方(LMS)算法实现分离信号之间的相关性最小。由于各发射基站信号之间统计不相关，当分离信号之间的相关性达到最小时，完成观测信号的分离。在此基础上，改进了传统无源雷达信号处理的流程，增加了分离同频干扰基站直达波和多径杂波的步骤，实现了对同频干扰基站杂波的抑制。通过仿真分析，验证了算法的有效性，为基于LTE信号的无源雷达数据处理提供了参考。
关键词:无源雷达/
长期演进信号/
同频干扰抑制/
盲源分离/
2阶统计量
Abstract:For the problem of co-frequency base station interference in passive radar based on Long Term Evolution (LTE) signal, an algorithm based on blind source separation using second order statistics is proposed. The presented algorithm is based on convolution mixed model, and achieves the minimum correlation among separated signals through multi-channel Least-Mean-Square (LMS) algorithm. Without statistical correlation among the signals of each transmitting base station, the separation of the observed signals is completed when the separated signals achieve the minimum correlation. On this basis, the traditional signal processing for passive radar is improved. The steps of separating co-frequency interference clutter consisting of both direct-path and multipath clutter are added, which can suppress the clutter interference of co-channel base station. Simulation and analysis verify the effectiveness of the algorithm. The algorithm provides a reference for data processing of passive radar based on LTE signal.
Key words:Passive radar/
Long Term Evolution (LTE) signal/
Co-channel interference suppression/
Blind source separation/
Second order statistics



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