基于压缩感知的三孔径毫米波合成孔径雷达侧视三维成像  

Three-aperture Millimeter-wave SAR Side-looking Three-dimensional Imaging Based on Compressed Sensing

作　　者：李烈辰[1,2,3] 李道京[1,2] 张清娟[1,2,3] 

机构地区：[1]微波成像技术重点实验室,北京100190 [2]中国科学院电子学研究所,北京100190 [3]中国科学院研究生院,北京100190

出　　处：《电子与信息学报》2013年第3期552-558,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61271422);国家973计划项目(2009CB72400)资助课题

摘　　要：基于压缩感知,该文研究了交轨向三孔径毫米波合成孔径雷达侧视3维成像问题。利用交轨方向的三孔径天线形成的稀疏阵列结构,获取高程分辨率并实现3维成像。由于交轨方向的采样数较少及非均匀采样,高程分辨率低,传统的基于傅里叶变换的3维成像技术获得的图像质量较差。针对此不足,在交轨向稀疏采样的条件下,该文采用压缩感知方法来实现超分辨成像。利用仿真和实际数据比较了传统成像方法和基于压缩感知的成像方法的性能,并验证了该文方法的有效性。Side-looking three-Dimensional （3D） imaging of three-aperture sparse array Synthetic Aperture Radar （SAR） based on Compressed Sensing （CS） is investigated in this paper. Using the sparse array structure in cross- track direction formed by three aperture antennas, the elevation resolution can be obtained and 3D imaging is achieved. However, the conventional Fourier transform based 3D imaging approach has a low resolution in elevation direction and brings the image quality problem because of the low number of acquisitions and irregular space sampling. CS theory is introduced to improve the resolution in the elevation direction. Experiment results on simulation and real data validate the effectiveness of the proposed method compared with the conventional imaging technique.

关 键 词：合成孔径雷达 3维成像 压缩感知 毫米波雷达 稀疏阵列 

分 类 号：TN957.52[电子电信—信号与信息处理]