基于LTE信号的外辐射源雷达副峰特性及抑制方法研究

吕晓德; 张汉良; 杨璟茂; 岳琦

doi:10.11999/JEIT180019

基于LTE信号的外辐射源雷达副峰特性及抑制方法研究

doi: 10.11999/JEIT180019

吕晓德^{1, 2},
张汉良^{1, 2, 3, ,},
杨璟茂^{1, 2, 3},
岳琦^{1, 2, 3}

1.
中国科学院大学电子学研究所北京 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

杨璟茂：男，1992年生，硕士生，研究方向为机载外辐射源雷达杂波抑制

岳琦：男，1992年生，硕士生，研究方向为外辐射源雷达信号处理

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

中图分类号: TN958.97
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- 文章访问数: 1898
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- 被引次数: 0
出版历程
- 收稿日期: 2018-01-05
- 修回日期: 2018-05-29
- 网络出版日期: 2018-07-30
- 刊出日期: 2018-10-01

Research on Characteristics and Suppression Methods of Side Peaks of Passive Radar Based on LTE Signal

Xiaode LÜ^{1, 2},
Hanliang ZHANG^{1, 2, 3
, ,},
Jingmao YANG^{1, 2, 3},
Qi YUE^{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，首先根据LTE信号结构分析了其模糊函数的特性，解释了不同类型副峰的产生机理。然后，针对对探测性能有影响的两类副峰，提出相应的抑制算法：对于循环前缀副峰，提出数据非连续分块的快速互模糊算法；对于频谱不连续产生的副峰，提出频带合成和频域加窗的抑制算法。最终通过两种抑制算法的综合处理，得到LTE信号图钉状的模糊函数。该文工作为基于LTE信号的外辐射源雷达副峰抑制提供了新的方法。
- 外辐射源雷达 /
- LTE信号 /
- 模糊函数 /
- 副峰抑制
Abstract: For the passive radar based on Long Term Evolution (LTE) signal, firstly, the ambiguity function are analyzed, and the producing mechanism of different side peaks are explained. Then, a series of corresponding suppression algorithms are proposed for two types of side peaks degrading detection performance: For the side peaks caused by the cyclic prefix, a fast ambiguity algorithm based on non-continuous chunking of data is proposed; For the side peaks caused by the non-continuous spectrum, the suppression algorithm of bandwidth synthesis and frequency domain windowed is proposed. Finally, the thumbtack ambiguity function of the LTE signal is obtained through integrated processing of two suppression algorithms. The work of this paper provides a new method for the side peaks suppression of the passive radar based on the LTE signal.
- Passive radar /
- Long Term Evolution (LTE) signal /
- Ambiguity function /
- Side peaks suppression

HTML全文

图 1 LTE信号帧结构

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图 2 LTE信号资源网格结构

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图 3 同步信号位置示意图

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图 4 LTE信号的模糊函数

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图 5 LTE信号模糊函数距离剖面

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图 6 LTE信号下行链路频谱

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图 7 数据非连续分块快速互模糊算法示意图

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图 8 LTE信号非连续分块模糊函数图

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图 9 LTE信号频带合成和加窗处理后的频谱图

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图 10 LTE信号频带合成和加窗处理后模糊函数图

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图 11 综合处理流程图

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图 12 LTE信号综合处理后模糊函数图

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