%0 Journal Article
%T 基于变迹滤波的MIMO-SAR图像分辨率增强技术<br>Enhanced resolution in MIMO-SAR imaging using apodization
%A 徐光耀
%A 刘永泽
%A 许小剑
%J 北京航空航天大学学报
%D 2017
%R 10.13700/j.bh.1001-5965.2016.0514
%X 摘要 针对多输入多输出合成孔径雷达（MIMO-SAR）在近场目标散射特征诊断成像中，非正交旁瓣难以通过常规方法进行有效抑制的问题，分析了MIMO-SAR图像非正交旁瓣的产生机理，提出了基于空间变迹滤波（SVA）和三变迹处理相结合的旁瓣抑制方法。仿真和实验结果表明，本文方法不仅能很好地抑制距离向旁瓣，而且对于方位向非正交旁瓣也具有较好的抑制效果，提高了MIMO-SAR图像的二维分辨率和动态范围。<br>Abstract：When the conventional methods of sidelobe suppression are used in multiple input multiple output synthetic aperture radar (MIMO-SAR) systems to generate images for diagnosing the near field scattering features of targets, non-orthogonal sidelobes can hardly be suppressed efficiently. In this paper, based on the generation mechanisms of the non-orthogonal sidelobes in near filed, an approach which combines spatially variant apodization (SVA) with tri-apodization was proposed to suppress the non-orthogonal sidelobes for MIMO-SAR images. Simulation and experimental results demonstrate that the sidelobes in down range as well as the non-orthogonal sidelobes in cross range are suppressed efficiently via the proposed approach. As a consequence, for MIMO-SAR images, the resolutions in both the down range and the cross range are improved remarkably while a higher dynamic range can be achieved.
%K 多输入多输出合成孔径雷达（MIMO-SAR）
%K 旁瓣抑制
%K 变迹滤波
%K 空间变迹滤波（SVA）
%K 三变迹滤波&lt
%K br&gt
%K multiple input multiple output synthetic aperture radar (MIMO-SAR)
%K sidelobe suppression
%K apodization filtering
%K spatially variant apodization (SVA)
%K tri-apodization filtering
%U http://bhxb.buaa.edu.cn/CN/abstract/abstract14127.shtml