圆迹SAR的建筑物全方位优化成像方法研究

王建峰; 林赟; 郭胜龙; 喻玲娟; 洪文

doi:10.12000/JR15069

圆迹SAR的建筑物全方位优化成像方法研究

doi: 10.12000/JR15069

1.
(中国科学院电子学研究所北京 100190)
2.
(微波成像技术国家级重点实验室北京 100190)
3.
(中国科学院大学北京 100190)

基金项目:

国家自然科学基金重点基金项目(61431018)和国家自然科学基金青年基金项目(61201404)资助课题

详细信息

作者简介:
王建峰(1988-),男,籍贯陕西,中国科学院电子学研究所硕士研究生,研究方向为合成孔径雷达信号处理。E-mail:wangjianfeng13@mails.ucas.ac.cn;林赟(1983-),女,籍贯浙江,2011年获得中国科学院电子学研究所博士学位,中国科学院电子学研究所助理研究员,研究方向为合成孔径雷达3维成像技术、多角度SAR成像基础理论与方法研究。E-mail:ylin@mail.ie.ac.cn;郭胜龙(1987-),男,籍贯河南,中国科学院电子学研究所博士研究生,研究方向为极化SAR/简缩极化SAR/极化干涉等理论研究与应用;喻玲娟(1982-),女,籍贯江西,博士后,研究方向为合成孔径雷达信号处理;洪文(1968-),女,籍贯陕西,1997年获得北京航空航天大学博士学位,现任职于中国科学院电子学研究所,研究员,研究方向为合成孔径雷达成像与系统及其应用、极化/极化干涉合成孔径雷达数据处理及应用、3维微波成像新概念新体制新方法等。E-mail:whong@mail.ie.ac.cn

通讯作者:
洪文

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出版历程
- 收稿日期: 2015-06-01
- 修回日期: 2015-08-04
- 网络出版日期: 2015-12-28

Circular SAR Optimization Imaging Method of Buildings

1.
(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
2.
(Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China)
3.
(University of Chinese Academy of Sciences, Beijing 100190, China)

Funds:

The National Natural Science Foundation of China (61431018, 61201404)

摘要

摘要: 圆迹SAR (Circular SAR, CSAR)可对目标进行全方位观测, 获取目标的完整散射信息, 该文提出一种相干与非相干处理相结合的圆迹SAR建筑物全方位优化成像方法。利用FEKO建立建筑物的电磁散射模型来模拟雷达回波进行成像, 并与散射各向同性情况下的成像结果分析比较, 得出对建筑物CSAR成像最佳方位相干累积角度大小。由于实际场景中建筑物的散射方向未知, 将CSAR的360回波数据划分为小角度重叠的多个子孔径并分别成像, 对成像后的子孔径进行非相干融合后得到全方位合成图像。再对合成后图像进行极化目标分解, 获取场景中建筑物的轮廓信息。P波段机载圆迹SAR数据处理结果表明该方法优于传统全相干累积方法, 可实现建筑物的全方位轮廓信息提取。
- 圆迹SAR /
- 电磁散射模型 /
- 非相干融合 /
- 建筑物轮廓 /
- 极化目标分解
Abstract: The Circular Synthetic Aperture Radar (CSAR) can obtain the entire scattering properties of targets because of its great ability of 360 observation. In this study, an optimal orientation of the CSAR imaging algorithm of buildings is proposed by applying a combination of coherent and incoherent processing techniques. FEKO software is used to construct the electromagnetic scattering modes and simulate the radar echo. The FEKO imaging results are compared with the isotropic scattering results. On comparison, the optimal azimuth coherent accumulation angle of CSAR imaging of buildings is obtained. Practically, the scattering directions of buildings are unknown; therefore, we divide the 360 echo of CSAR into many overlapped and few angle echoes corresponding to the sub-aperture and then perform an imaging procedure on each sub-aperture. Sub-aperture imaging results are applied to obtain the all-around image using incoherent fusion techniques. The polarimetry decomposition method is used to decompose the all-around image and further retrieve the edge information of buildings successfully. The proposed method is validated with P-band airborne CSAR data from Sichuan, China.
- Circular Synthetic Aperture Radar (CSAR) /
- Electromagnetic scattering modes /
- Incoherent fusion techniques /
- The edge information of buildings /
- Polarimetry decomposition

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参考文献(18)

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