SAR移频欺骗干扰距离主瓣展宽问题解决方法

doi:10.12305/j.issn.1001-506X.2026.04.08

系统工程与电子技术 ›› 2026, Vol. 48 ›› Issue (4): 1174-1185.doi: 10.12305/j.issn.1001-506X.2026.04.08

• 传感器与信号处理 • 上一篇

SAR移频欺骗干扰距离主瓣展宽问题解决方法

黄天佑(), 林惠孚, 杨超, 赖涛(), 王青松, 黄海风

中山大学电子与通信工程学院，广东深圳 518107

收稿日期:2025-01-13 修回日期:2025-03-03 接受日期:2026-02-28 出版日期:2025-07-03 发布日期:2025-07-03
通讯作者: 赖涛 E-mail:2879460980@qq.com;lait3@mail.sysu.edu.cn
作者简介:黄天佑（2000—），男，硕士研究生，主要研究方向为SAR干扰
林惠孚（1996—），男，博士研究生，主要研究方向为SAR系统与干扰机系统的设计与信号处理
杨　超（2000—），男，硕士研究生，主要研究方向为SAR干扰技术
王青松（1983—），男，副教授，博士，主要研究方向为遥感图像精化处理、智能视觉导航、协同探测感知与信息融合
黄海风（1976—），男，教授，博士，主要研究方向为空间电子、智能感知
基金资助:
深圳市科技计划（SGDX20230116092503007）资助课题

A method for resolving range mainlobe broadening in SAR frequency-shift deception jamming

Tianyou HUANG(), Huifu LIN, Chao YANG, Tao LAI(), Qingsong WANG, Haifeng HUANG

School of Electronics and Communication Engineering，Sun Yat-sen University，Shenzhen 518107，China

Received:2025-01-13 Revised:2025-03-03 Accepted:2026-02-28 Online:2025-07-03 Published:2025-07-03
Contact: Tao LAI E-mail:2879460980@qq.com;lait3@mail.sysu.edu.cn

摘要/Abstract

摘要：

针对大场景合成孔径雷达移频欺骗干扰中，因处理带宽限制导致大范围移频引发干扰信号带宽损失，进而造成虚假目标距离主瓣展宽、成像质量下降及干扰逼真性降低的问题，提出一种基于信号延拓的干扰信号带宽扩展方法，解决欺骗干扰距离移频导致的距离主瓣展宽问题。首先，干扰机使用解线调接收的方法得到中频信号；然后，设计卡尔曼预测滤波器实现中频信号的时域延拓；其次，对延拓后的中频信号进行移频干扰调制；最后，上变频得到带宽扩展的干扰信号。仿真结果显示，所提方法可以显著提高距离偏移量大的虚假点目标的距离分辨率以及虚假场景的成像质量，可有效解决合成孔径雷达移频欺骗干扰的距离主瓣展宽问题。

关键词: 合成孔径雷达, 移频欺骗干扰, 距离主瓣展宽, 带宽扩展, 信号延拓, Kalman预测滤波器

Abstract:

In large-scene jamming scenarios, due to the bandwidth limitations of SAR processing, wide-range frequency shifts can result in bandwidth loss in the jamming signal, leading to range mainlobe broadening, degradation of false target imaging quality and reduced fidelity of deception jamming. This broadening also causes variations in imaging quality with respect to frequency offset, reducing the fidelity of the jamming. To enhance the fidelity of large-scene frequency-shift deception jamming, this paper proposes a bandwidth extrapolation method based on signal extension, addressing the range mainlobe broadening caused by frequency shift. Firstly, the jammer obtains the intermediate-frequency (IF) signal using a dechirp reception method. Then, a Kalman predictive filter is designed to extend the IF signal in the time domain. Next, the extended IF signal undergoes frequency-shift modulation. Finally, up-conversion generates the bandwidth-extrapolated jamming signal. Simulation results demonstrate that the proposed method significantly improves the range resolution of false point targets with large range offset and the imaging quality of false scenes, thereby effectively resolving the range mainlobe broadening issue in SAR frequency-shift deception jamming.

Key words: synthetic aperture radar (SAR), frequency-shift deception jamming, range mainlobe broadening, bandwidth extrapolation, signal extension, Kalman predictive filter

中图分类号:

TN 957.5

黄天佑, 林惠孚, 杨超, 赖涛, 王青松, 黄海风. SAR移频欺骗干扰距离主瓣展宽问题解决方法[J]. 系统工程与电子技术, 2026, 48(4): 1174-1185.

Tianyou HUANG, Huifu LIN, Chao YANG, Tao LAI, Qingsong WANG, Haifeng HUANG. A method for resolving range mainlobe broadening in SAR frequency-shift deception jamming[J]. Systems Engineering and Electronics, 2026, 48(4): 1174-1185.

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参数	数值
载频/GHz	9.6
带宽/MHz	50
脉宽/μs	20
距离向处理带宽/MHz	60
脉冲重复频率/Hz	3509
斜距/km	500
天线孔径/m	6
天线主瓣宽度/rad	0.0052

SNR/dB	PSLR/dB	ISLR/dB	IRW/m
未作处理	−12.755	−3.336	7.001
−10 dB	−12.779	−3.353	7.009
10 dB	−15.144	−11.434	3.581
30 dB	−12.785	−10.260	3.280

误差	PSLR/dB	ISLR/dB	IRW/m
未作处理	−12.755	−3.336	7.001
初始状态无误差	−12.785	−10.260	3.280
初始状态10%误差	−12.777	−10.277	3.282
初始状态20%误差	−12.770	−10.271	3.282

误差	PSLR/dB	ISLR/dB	IRW/m
无误差	−12.785	−10.260	3.280
相位差$ {\text{π}} /4 $	−9.990	−8.727	3.254
相位差$ {\text{π}} /2 $	−6.462	−5.472	3.163

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SAR移频欺骗干扰距离主瓣展宽问题解决方法

A method for resolving range mainlobe broadening in SAR frequency-shift deception jamming

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