| 基于轨道角动量的电磁涡旋SAR成像新方法 |
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| 引用本文： | 方越,王鹏波,陈杰.基于轨道角动量的电磁涡旋SAR成像新方法[J].上海航天,2018(6):8-11. |
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| 作者姓名： | 方越 王鹏波 陈杰 |
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| 作者单位： | 北京航空航天大学, 电子信息工程学院, 北京 100191,北京航空航天大学, 电子信息工程学院, 北京 100191;地球空间信息技术协同创新中心, 湖北 武汉 430079,北京航空航天大学, 电子信息工程学院, 北京 100191;地球空间信息技术协同创新中心, 湖北 武汉 430079 |
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| 摘 要： | 为研究电磁涡旋波在合成孔径雷达(SAR)领域的应用潜力,验证电磁涡旋SAR成像的可行性,将电磁涡旋与合成孔径雷达模型结合,通过使用单一模式的轨道角动量,用合成孔径原理实现方位聚焦。给出了基于电磁涡旋的SAR几何模型和回波信号模型,并提出了适用于电磁涡旋SAR的改进chirp-scaling(CS)成像算法。通过点目标仿真分析,验证了所提成像算法的有效性。该方法可为SAR系统新体制设计及雷达的研究提供参考。
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| 关 键 词： | 轨道角动量 电磁涡旋 chirp-scaling算法 合成孔径雷达 |
| 收稿时间： | 2018/9/7 0:00:00 |
| 修稿时间： | 2018/10/19 0:00:00 |
A Novel Imaging Algorithm for Electromagnetic Vortex SAR Based on Orbital Angular Momentum |
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| FANG Yue,WANG Pengbo and CHEN Jie.A Novel Imaging Algorithm for Electromagnetic Vortex SAR Based on Orbital Angular Momentum[J].Aerospace Shanghai,2018(6):8-11. |
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| Authors: | FANG Yue WANG Pengbo and CHEN Jie |
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| Institution: | School of Electronic and Information Engineering, Beihang University, Beijing 100191, China,School of Electronic and Information Engineering, Beihang University, Beijing 100191, China;Collaborative Innovation Center of Geospatial Technology, Wuhan 430079, Hubei, China and School of Electronic and Information Engineering, Beihang University, Beijing 100191, China;Collaborative Innovation Center of Geospatial Technology, Wuhan 430079, Hubei, China |
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| Abstract: | The imaging potential of orbital angular momentum (OAM) based electromagnetic (EM) vortex in synthetic aperture radar (SAR) field is studied in this paper. EM vortex and SAR model are innovatively combined, and focus in azimuth is realized based on synthetic aperture principle by use of single-mode OMA. In this paper, a novel imaging algorithm of EM vortex SAR based on the chirp-scaling algorithm is proposed, in which the radar is moving and OAM mode is fixed as a constant. The SAR geometry model and echo signal model of EM vortex are deduced, and a modified CS imaging algorithm is proposed. Simulations of point-like targets validate the effectiveness of the proposed imaging algorithm, which paves the way for the design of new mechanism SAR system and the research of the radar. |
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| Keywords: | orbital angular momentum(OAM) electromagnetic(EM) vortex chirp-scaling(CS) algorithm synthetic aperture radar(SAR) |
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