单通道合成孔径雷达抗调频斜率失配干扰新方法

孟智超; 卢景月; 张帅钦; 张磊; 王虹现

doi:10.11999/JEIT190687

单通道合成孔径雷达抗调频斜率失配干扰新方法

doi: 10.11999/JEIT190687

1.
西安电子科技大学雷达信号处理国家重点实验室西安 710071
2.
63610部队库尔勒 841001
3.
中山大学电子与通信工程学院广州 510275

基金项目: 国家自然科学基金(61771372, 61771367)

详细信息

作者简介:
孟智超：男，1997年生，博士生，研究方向为合成孔径雷达成像与抗干扰

卢景月：男，1994年生，博士生，研究方向为合成孔径雷达成像

张帅钦：男，1983年生，高级工程师，研究方向为雷达目标特性与目标识别

张磊：男，1984年生，副教授，研究方向为合成孔径雷达成像，目标识别

王虹现：男，1979年生，副教授，研究方向为雷达信号处理

通讯作者:
张磊　zhanglei57@mail.sysu.edu.cn

中图分类号: TN975
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出版历程
- 收稿日期: 2019-09-05
- 修回日期: 2020-04-02
- 网络出版日期: 2020-04-11
- 刊出日期: 2020-09-27

A New Method of Anti-FM Slope Mismatch Jamming for Single Channel Synthetic Aperture Radar

1.
National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2.
No.66393 Unit, the PLA, Kuerle 841001, China
3.
School of Electronic and Communication Engineering, Sun Yat-sen University, Guangzhou 510275, China

Funds: The National Natural Science Foundation of China (61771372, 61771367)

摘要

摘要: 该文针对单通道合成孔径雷达(SAR)无法有效抑制调频斜率失配干扰的问题进行了深入的研究。根据干扰频谱与真实回波频谱的差异，该文提出了一种基于频域匹配滤波处理的合成孔径雷达调频斜率失配干扰抑制方法。该方法在准确测得干扰调频斜率的基础上，首先利用干扰信号的空间稀疏性以及低信干比(SIR)的特点，对干扰位置进行稀疏超分辨估计以获得较为精确的干扰时延相位。然后通过获得的干扰调频斜率和时延相位重建干扰信号频谱，以此为基础设计正交匹配滤波器在频域实施干扰信号的抑制，并重建无失真场景图像。最后，计算机仿真实验验证了该文所提方法的有效性。
- 抗干扰 /
- 调频斜率失配干扰 /
- 稀疏 /
- 正交匹配滤波
Abstract: The problem that single-channel Synthetic Aperture Radar (SAR) can not effectively suppress FM slope mismatch jamming is studied in this paper. According to the difference between the jamming spectrum and the real echo spectrum, a method for suppressing the mismatch jamming of SAR FM slope based on matched filtering in the frequency domain is proposed. Based on the accurate measurement of the slope of jamming FM, the sparse super-resolution estimation of the jamming position is carried out to obtain a more accurate phase of jamming delay by utilizing the sparsity of the jamming signal and the characteristics of low Signal-to-Interference Ratio (SIR). Then, the spectrum of the interference signal is reconstructed by the obtained slope of interference frequency modulation and phase delay. Based on this, the orthogonal matched filter is designed to suppress the interference signal in the frequency domain and reconstruct the undistorted scene image. Finally, computer simulation experiments verify the effectiveness of the proposed method.
- Anti-jamming /
- FM slope mismatch jamming /
- Sparse /
- Orthogonal matched filtering

HTML全文

图 1 算法流程示意图

下载: 全尺寸图片幻灯片

图 2 正交匹配滤波影响因子关系曲线

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图 3 SIR对频域陷波法干扰抑制比的影响

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图 4 点目标成像干扰抑制效果对比

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图 5 干扰抑制成像对比实验

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表 1 实验参数

参数	数值	参数	数值
载频	3 GHz	距离向采样点	1024
信号带宽	100 MHz	脉冲数	512
脉冲宽度	2 μs	脉冲重复频率	3 kHz
采样频率	120 MHz	干扰点源数量	1
平台速度	50 m/s	调频斜率失配比	0.8

下载: 导出CSV

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