基于导航卫星的InBSAR信号处理与实验验证  

GNSS-based InBSAR Signal Processing and Experimental Confirmation

作　　者：曾涛[1] 刘飞峰[1] 田卫明[1] 胡程[1] 龙腾[1] Zeng Tao;Liu Feifeng;Tian Weiming;Hu Cheng;Long Teng(School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《信号处理》2020年第3期317-327,共11页Journal of Signal Processing

基　　金：国家自然科学基金项目(61625103,61601032)。

摘　　要：基于导航卫星的干涉双基地SAR(InBSAR)系统采用在轨的导航卫星作为照射源,通过共享导航信号实现雷达与导航功能的信号级融合,具备时间、空间同时双连续形变监测能力。本文讨论了高自由度对大幅度提升该系统多角度成像、多基线干涉与层析性能的物理机理。由于导航卫星自有的同时可见多星、多星座的特点,基于导航卫星的InBSAR具有系统自由度极高的优势。本文同时总结并分析了图像融合、三维形变和层析成像等信号处理算法。最后对近年来相关领域的最新研究进展进行了综述和分析,指出了该项技术的后续发展方向。GNSS-based InBSAR system employs the GNSS satellites as transmitters of opportunity and a fixed receiver in the ground.Based on the principal of SAR imaging and repeat-pass interferometry,the system has the potential of both temporal and spatial consecutive monitoring of 3-dimensional deformation information of target area.This paper analyzed the physical ground of high degree of freedom on the performance improvement of multiangle imaging,multi-baseline interferomentry and topography for GNSS-based InBSAR.The simultaneously availability of multi-satellite and multi-constellation of inherited GNSS system enables the high degree of freedom for the system.The typical processing algorithms of multi-angle image fusion and 3D deformation retrieval as well as tomographic image formation were summarized and analyzed to account for the advantages of the system in the paper.The state of art of related latest research achievements of the system,as well as the future work,were also surveyed and concluded in the paper.

关 键 词：基于导航卫星的干涉双基地合成孔径雷达 多角度成像 多基线干涉 层析 

分 类 号：TN951[电子电信—信号与信息处理]