现代防御技术 ›› 2025, Vol. 53 ›› Issue (5): 152-160.DOI: 10.3969/j.issn.1009-086x.2025.05.016

• 目标特性与探测跟踪技术 • 上一篇    

基于SAR成像+寻的双模动目标判别方法

张旸翼瑶, 汤斌, 杨子葳   

  1. 北京遥感设备研究所,北京 100854
  • 收稿日期:2024-07-17 修回日期:2024-10-08 出版日期:2025-10-28 发布日期:2025-11-03
  • 作者简介:张旸翼瑶(2000-),男,北京人。硕士生,研究方向为目标探测与识别。

A Dual-mode Moving Target Discrimination Method Based on SAR Imaging and Homing

Yangyiyao ZHANG, Bin TANG, Ziwei YANG   

  1. Beijing Institute of Remote Sensing Equipment,Beijing 100854,China
  • Received:2024-07-17 Revised:2024-10-08 Online:2025-10-28 Published:2025-11-03

摘要:

SAR成像可以精确定位静止目标,但对于运动目标会因多普勒频率导致几何位置偏移。利用动目标SAR成像这一特点,结合寻的测量定位结果,对比二者测量结果,从原理上推导出运动目标判别方法,为机载、弹载等观测时间短、体积小的目标识别系统提供了一种仅发射单一LFM波判别目标是否运动的方法,为后续对抗无源欺骗干扰(角反、箔条)打下基础。建立了雷达对水面目标观测的SAR成像模型,分析了SAR成像机理;阐述了雷达寻的模式与SAR成像模式下对动目标位置测量效果的差异,并推导出利用该差异识别运动目标的方法;仿真结果表明新方法能够在有限图幅数条件下表现出良好探测效果。

关键词: 合成孔径雷达, (SAR), 寻的雷达, 动目标检测, 目标识别, 多模复合制导

Abstract:

Synthetic aperture radar (SAR) imaging can accurately locate the static target, but for moving targets, the geometric position is offset due to the Doppler frequency. This paper, by exploiting this characteristic of SAR imaging for moving targets and combining it with homing measurement and positioning results, derived a moving target discrimination method in principle by comparing the two measurement results. The method provides airborne and missile-borne target recognition systems with short observation time and compact configuration to discriminate whether a target is moving by transmitting only a single LFM waveform and lays the foundation for countering passive deception jamming, such as corner reflectors and chaff. In this paper, the SAR imaging model for radar observation of sea surface targets was established, and the mechanism of SAR imaging was analyzed. Then, the differences in target position measurements between radar homing mode and SAR imaging mode were described, and a method for recognizing moving targets based on these differences was deduced. Simulation results show that the proposed method exhibits good detection performance under the condition of a limited number of image frames.

Key words: synthetic aperture radar, (SAR), homing radar, moving target detection, target recognition, multi-mode composite guidance

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