基于参数化运动补偿的地基雷达对月成像技术  

Earth-Based Radar Mapping Technology of the Moon Based on Parametric Motion Compensation

作　　者：丁泽刚[1,2] 张光伟 刘思源 李根 王岩 曾涛 龙腾[1,2] DING Zegang;ZHANG Guangwei;LIU Siyuan;LI Gen;WANG Yan;ZENG Tao;LONG Teng(Radar Research Lab,School of Information and Electronics,Beijing Institute Technology,Beijing 100081,China;Beijing Key Laboratory of Embedded Real-time Information Processing Technology,Beijing 100081,China)

机构地区：[1]北京理工大学信息与电子学院雷达技术研究所,北京100081 [2]嵌入式实时信息处理技术北京市重点实验室,北京100081

出　　处：《信号处理》2021年第2期167-176,共10页Journal of Signal Processing

基　　金：国家自然科学基金重点项目(11833001,61931002)。

摘　　要：地基雷达对月成像可以获得月球表面的电磁散射特性、地形地貌特征等,可用于月球的科学研究。地基雷达对月成像技术是将合成孔径技术应用到天文探测当中,延迟多普勒技术是地基雷达天文成像应用最为广泛的技术,其关键在于运动补偿。目前,国外在地基天文雷达领域的研究上已趋于成熟,而我国正处于起步阶段。为解决地基雷达对月成像中的难点问题,本文首先基于地月运动几何模型分析了延迟多普勒成像理论的关键问题,包括成像原理、分辨率和模糊问题。接着,本文提出了一种参数化运动补偿算法,该算法以图像熵值为评价指标进行参数搜索,并采用布谷鸟搜索算法提升参数搜索效率。最后,通过仿真验证了算法的有效性,为将来开展试验验证提供了技术支撑。Earth-based radar mapping of the moon can obtain the electromagnetic scattering characteristics and topographic features of the lunar surface, which can be used for scientific research on the moon. Earth-based radar mapping technology of the moon is the application of synthetic aperture technology to astronomical detection. Delay Doppler technology is the most widely used technology for earth-based radar astronomical mapping, and its key lies in motion compensation. At present, foreign research in the field of earth-based astronomical radar has become mature, while my country is in its infancy. In order to solve the difficult problems in earth-based radar mapping of the moon, this paper firstly analyzes the key problems of delay Doppler mapping theory based on the geometric model of the earth-moon motion, including the mapping principle, resolution and blur problem. Next, this paper proposes a parametric motion compensation algorithm, which uses image entropy as an evaluation index to search for parameters, and uses cuckoo search algorithm to improve the efficiency of parameter search. Finally, the effectiveness of the algorithm is verified by simulation, which provides technical support for future experiments.

关 键 词：地基雷达天文学 合成孔径技术 延迟多普勒成像 参数化运动补偿 布谷鸟搜索 

分 类 号：TN959.6[电子电信—信号与信息处理]