系统工程与电子技术 ›› 2026, Vol. 48 ›› Issue (6): 1859-1868.doi: 10.12305/j.issn.1001-506X.2026.06.08

• 传感器与信号处理 • 上一篇    下一篇

地基雷达对月多普勒补偿成像方法

袁永康1(), 王君旭1(), 华煜明2(), 张磊1,*()   

  1. 1. 中山大学深圳电子与通信工程学院,广东 深圳 518107
    2. 北京跟踪与通信技术研究所,北京 100094
  • 收稿日期:2025-03-19 修回日期:2025-05-10 接受日期:2025-06-11 出版日期:2026-06-25 发布日期:2026-03-21
  • 通讯作者: 张磊 E-mail:yuanyk5@mail2.sysu.edu.cn;wangjx77@mail2.sysu.edu.cn;huayuming9@163.com;zhanglei57@mail.sysu.edu.cn
  • 作者简介:袁永康(2001—),男,硕士研究生,主要研究方向为地基雷达天文成像
    王君旭(2000—),男,博士研究生,主要研究方向为合成孔径雷达成像和抗干扰
    华煜明(1990—),男,助理研究员,硕士,主要研究方向为雷达信号处理、雷达总体设计

Earth-based radar Lunar imaging using Doppler compensation method

Yongkang YUAN1(), Junxu WANG1(), Yuming HUA2(), Lei ZHANG1,*()   

  1. 1. School of Electronics and Communication Engineering,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China
    2. Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China
  • Received:2025-03-19 Revised:2025-05-10 Accepted:2025-06-11 Online:2026-06-25 Published:2026-03-21
  • Contact: Lei ZHANG E-mail:yuanyk5@mail2.sysu.edu.cn;wangjx77@mail2.sysu.edu.cn;huayuming9@163.com;zhanglei57@mail.sysu.edu.cn

摘要:

地基雷达是月面成像的重要设备。然而,地基雷达处于观测边缘期时,脉内多普勒效应会导致脉压偏移,使得传统后向投影算法生成的月面图像出现偏移。为提高地基雷达观测边缘期的月面成像能力与减小定位偏差,提出逐脉冲轨迹拟合方法,分析非停走假设下的回波模型与脉内多普勒效应影响,并提出一种月面后向投影成像的脉内多普勒补偿方法。仿真实验结果表明所提方法能够使月面后向投影图像精准定位与聚焦,算法具有有效性。

关键词: 地基雷达, 月面成像, 合成孔径雷达, 后向投影算法, 非停走回波模型

Abstract:

Earth-based radar is a powerful tool for lunar surface imaging. However, during edge observation periods, intra-pulse Doppler effects will induce pulse compression shifts, causing image offset generated by the traditional back-projection (BP) algorithm. To improve lunar imaging performance and mitigate positioning deviations of Earth-based radar under edge observation conditions, this study first proposes a pulse-by-pulse trajectory fitting method, and then analyzes the echo model and intra-pulse Doppler effects under the non stop-go assumption. Subsequently, a method for compensating intra-pulse Doppler effects in lunar surface BP imaging is proposed. Finally, simulation results demonstrate that the proposed method can achieve accurate localization and focusing of the lunar SAR image, validating the effectiveness of the algorithm.

Key words: Earth-based radar, Lunar surface imaging, synthetic aperture radar (SAR), back-projection (BP)algorithm, non-stop-go echo model

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