基于DPCA技术的星载SAR/GMTI处理方法
An Algorithm of Spaceborne SAR/GMTI Based on DPCA
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摘要: 星载合成孔径雷达的轨道运动以及地球自转、地球曲率等因素使星载SAR/GMTI处理方法与机载不同。该文首先分析了星载SAR三孔径天线信号特性，然后给出并详细分析了基于偏置相位中心天线(DPCA)的机载SAR/GMTI处理方法。在此基础上，给出了一种基于DPCA技术的星载SAR动目标检测、测速及目标定位的实现方法。最后，星载SAR/GMTI计算机仿真结果验证了该方法的有效性。Abstract: Such factors as complicated spaceborne SAR orbital motion, earth rotation, earth surface curvature etc. make the realization of spaceborne SAR/GMTI different from airborne SAR/GMTI. In this paper, the property of three-antenna spaceborne SAR is analyzed firstly, and then the method of airborne SAR/GMTI processing is given and analyzed. On the basis of airborne SAR/GMTI, an algorithm of spaceborne SAR moving target detection, radial velocity estimation and relocation based on DPCA technique is presented. Finally, spaceborne SAR/GMTI computer simulation results validate its effectiveness.
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