CAJ | 학술논문

通过对多输入多输出合成孔径雷达(MIMO-SAR)的虚拟空间采样进行等效观测通道重构，可实现宽测绘带内的多通道合成孔径成像与地面运动目标显示(SAR/GMTI)处理。在建立宽测绘带MIMO-SAR运动目标观测模型的基础上，分析了该模式下MIMO-SAR运动目标回波与传统SAR系统运动目标回波的区别。并利用成对回波原理建立了目标回波的等效微动模型，提出了空间通道重构模式下MIMO-SAR运动目标的等效微动效应，并讨论了运动目标回波的时频谱线数目。最后，数值仿真验证了文中结论的正确性。
통과대다수입다수출합성공경뢰체(MIMO-SAR)적허의공간채양진행등효관측통도중구，가실현관측회대내적다통도합성공경성상여지면운동목표현시(SAR/GMTI)처리。재건립관측회대MIMO-SAR운동목표관측모형적기출상，분석료해모식하MIMO-SAR운동목표회파여전통SAR계통운동목표회파적구별。병이용성대회파원리건립료목표회파적등효미동모형，제출료공간통도중구모식하MIMO-SAR운동목표적등효미동효응，병토론료운동목표회파적시빈보선수목。최후，수치방진험증료문중결론적정학성。
The SAR/GMTI in wide-swath can be obtained by reconstructing virtual space samplings of MIMO-SAR into equivalent observation channels. Based on the properties of the configuration of wide-swath MIMO-SAR, the echo signal of moving target was firstly studied to reveal the distinctness with the echo signal of traditional SAR system. The effect of the echo signal of moving target in MIMO-SAR was also studied using paired echo principle (PEP). This analysis decomposed the echo signal into equivalent micro-motion phenomenon, which had a similar characteristic with micromotion target. Then, the expected time-frequency spectrum of MIMO-SAR in wide-swath was discussed in detail. Finally, numerical simulations give the validity of conclusions.