电光与控制, 2013, 20 (8): 42, 网络出版: 2013-08-28
机载高分辨率大场景MIMOSAR成像算法研究
An Algorithm for HighPrecision LargeRegion Imaging of Airborne MIMOSAR
摘要
机载MIMOSAR在增大可照射场景范围的同时,也会带来距离空变性问题,使得现有算法在大场景模型下会出现各种误差。基于正侧视大场景模型,对上述问题进行详细的推导分析,指出成像场景测绘带宽变大而导致的失配现象是产生误差的主要因素,并提出了一种机载高分辨率大场景成像算法。理论分析和实验结果验证了该方法的有效性。
Abstract
The airborne multiinput multioutput synthetic aperture radar (MIMOSAR) may have spacevariant range error while enlarging the illuminated areathus result in various imaging error for the existing algorithms applied to the large scale model.This paper presents a theoretical analysis based on the sidelooking modeland the analysis shows that under the widen swaththe mismatch between the echo signal and the reference function is the main factor of the imaging error.So an algorithm of highprecisionlarge region imaging was proposedwhich was verified by the results of simulation.
谢超, 王党卫, 马晓岩, 王力宝, 李定山. 机载高分辨率大场景MIMOSAR成像算法研究[J]. 电光与控制, 2013, 20(8): 42. XIE Chao, WANG Dangwei, MA Xiaoyan, WANG Libao, LI Dingshan. An Algorithm for HighPrecision LargeRegion Imaging of Airborne MIMOSAR[J]. Electronics Optics & Control, 2013, 20(8): 42.