基于干涉相位的SAR有源欺骗干扰检测的性能分析

李兆弘; 徐华平; 段书航; 李婧雯

doi:10.12000/JR24162

基于干涉相位的SAR有源欺骗干扰检测的性能分析

doi: 10.12000/JR24162

1.
北京航空航天大学电子信息工程学院北京 100191
2.
北京信息科学技术研究院北京 100094

基金项目: 国家重点研发计划(2002YFB3902302)，上海航天科技创新基金(SAST2022-048)

详细信息

作者简介:
李兆弘，博士生，主要从事星载合成孔径雷达处理和目标检测等方面的研究

徐华平，博士，教授，博士生导师，主要从事高分辨率微波雷达三维和四维信息获取、微波雷达图像处理和应用等

段书航，硕士，主要从事InSAR数据处理方面的相关研究

李婧雯，博士生，主要从事SAR干涉处理的相关研究

通讯作者:
李兆弘 lizhaohong9712@buaa.edu.cn

责任主编：代大海 Corresponding Editor: DAI Dahai
中图分类号: TN974
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出版历程
- 收稿日期: 2024-08-09
- 修回日期: 2024-09-11

Performance Analysis of SAR Active Deception Jamming Detection Based on Interferometric Phase

1.
School of Electronics and Information Engineering, Beihang University, Beijing 100191, China
2.
Beijing Academy of Information Sciences, Beijing 100094, China

Funds: National Key Research and Development Program of China (2002YFB3902302), SAST Foundation of China (SAST2022-048)

More Information

Corresponding author: LI Zhaohong, lizhaohong9712@buaa.edu.cn

摘要

摘要: 对基于干涉相位的合成孔径雷达(SAR)有源欺骗干扰检测进行了性能分析。首先基于真实场景和虚假目标的斜距向局部条纹频率概率分布，推导了欺骗干扰检测概率的显式表达式。分别分析了垂直基线长度、干信比和局部条纹频率估计窗口尺寸3个因素对欺骗干扰检测概率(TPR)的影响。进而分析了在给定虚警概率(FPR)时，SAR系统能够达到检测概率要求时所需的垂直基线长度，为SAR系统的基线设计提供了理论依据。在现有低轨SAR参数条件下，要得到更大的干扰检测概率，所需垂直基线长度也越大，因此，在设计SAR系统的基线时，既要保证垂直基线足够大可满足检测概率的要求，还需要兼顾真实场景的相干系数，垂直基线不能太大，满足场景可进行干涉的条件。最后，对理论分析的结论进行了仿真验证。理论分析与实验结果表明：在虚警概率固定的情况下，一定范围内垂直基线长度越大/干信比越大/局部条纹频率估计窗口越大，则干扰检测概率越大。
- 合成孔径雷达 /
- 性能分析 /
- 有源欺骗干扰 /
- 干扰检测 /
- 基线设计
Abstract: The performance of synthetic aperture radar (SAR) active deception jamming detection based on the interferometric phase is analyzed. Based on the slant-range local fringe frequency probability distributions of a real scene and a false target, the influences of the vertical baseline length, jamming-to-signal ratio, and local fringe frequency estimation window size on the true positive rate are analyzed. Furthermore, when the false positive rate is known, the vertical baseline length required for the SAR system to meet the detection probability requirements is analyzed, thereby providing a theoretical basis for the baseline design of the SAR system. Finally, the result of theoretical analysis is verified by simulation. The theoretical analysis and experimental results show that, for a certain false alarm probability, as the vertical baseline length, jamming-to-signal ratio, or local fringe frequency estimation window value increases, the detection probability also increases.
- Synthetic aperture radar /
- Performance analysis /
- Active deception jamming /
- Jamming detection /
- Baseline design

HTML全文

图 1 SAR有源欺骗干扰几何关系

Figure 1. Geometric relationship of active deceptive jamming in SAR

下载: 全尺寸图片幻灯片

图 2 干信比与检测概率关系图

Figure 2. Relationship between JSR and detection probability

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图 3 估计窗口尺寸与检测概率关系图

Figure 3. Relationship between estimated window size and detection probability

下载: 全尺寸图片幻灯片

图 4 垂直基线长度与检测概率关系图

Figure 4. Relationship between vertical baseline length and detection probability

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图 5 理论ROC曲线

Figure 5. Theoretical ROC curves

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图 6 SAR欺骗干扰前后SAR图像对比

Figure 6. Comparison of SAR Images Before and After Deceptive Jamming

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图 7 不同垂直基线长度下的干涉相位图

Figure 7. Interferometric Phase maps at different vertical baseline lengths

下载: 全尺寸图片幻灯片

图 8 不同垂直基线长度下的局部条纹频率估计结果

Figure 8. Local stripe frequency estimation results at different vertical baseline lengths

下载: 全尺寸图片幻灯片

图 9 仿真数据ROC曲线

Figure 9. ROC curves for simulated data

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表 1 固定参数表

Table 1. Fixed parameters table

参数值

中心斜距 1300 km
下视角 50°
斜距向采样间隔 1.2 m
波长 0.0375 m
真实场景信噪比 15 dB

下载: 导出CSV

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