检索结果-南通市图书馆

sparse flight spotlight mode 3-D imaging of spaceborne SAR based on sparse spectrum and principal component analysis

引用

Journal of Systems Engineering and Electronics 2021年第5期32卷 1143-1151页

作者： ZHOU Kai LI Daojing CUI Anjing HAN Dong TIAN He YU Haifeng DU Jianbo LIU Lei ZHU Yu ZHANG Running National Key Laboratory of Microwave Imaging Technology Aerospace Information Research Institute of Chinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeningUniversity of Chinese Academy of SciencesBeijing 100049China Science and Technology on Electromagnetic Scattering Laboratory Beijing Insti-tute of Environmental FeaturesBeijing 100854China General Design Department China Academy of Space TechnologyBeijing 100094China

The spaceborne synthetic aperture radar(SAR)sparse flight 3-D imaging technology through multiple observations of the cross-track direction is designed to form the cross-track equivalent aperture,and achieve the third dimensionality *** this paper,combined with the actual triple star orbits,a sparse flight spaceborne SAR 3-D imaging method based on the sparse spectrum of interferometry and the principal component analysis(PCA)is ***,interferometric processing is utilized to reach an effective sparse representation of radar images in the frequency ***,as a method with simple principle and fast calculation,the PCA is introduced to extract the main features of the image spectrum according to its principal ***,the 3-D image can be obtained by inverse transformation of the reconstructed spectrum by the *** simulation results of 4.84 km equivalent cross-track aperture and corresponding 1.78 m cross-track resolution verify the effective suppression of this method on high-frequency sidelobe noise introduced by sparse flight with a sparsity of 49%and random noise introduced by the ***,due to the influence of orbit distribution of the actual triple star orbits,the simulation results of the sparse flight with the 7-bit Barker code orbits are given as a comparison and reference to illuminate the significance of orbit distribution for this reconstruction *** method has prospects for sparse flight 3-D imaging in high latitude areas for its short revisit period.

关键词： principal component analysis(PCA) spaceborne synthetic aperture radar(SAR) sparse flight sparse spectrum by interferometry 3-D imaging

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Airborne sparse flight array SAR 3D imaging based on compressed sensing in frequency domain

引用

Journal of Systems Engineering and Electronics 2023年第1期34卷 56-67页

作者： TIAN He DONG Chunzhu YIN Hongcheng YUAN Li Science and Technology on Electromagnetic Scattering Laboratory Bejing Insititute of Environment FeaturesBeijing 100854China

In airborne array synthetic aperture radar(SAR), the three-dimensional(3D) imaging performance and cross-track resolution depends on the length of the equivalent array. In this paper, Barker sequence criterion is used for sparse flight sampling of airborne array SAR, in order to obtain high cross-track resolution in as few times of flights as possible. Under each flight, the imaging algorithm of back projection(BP) and the data extraction method based on modified uniformly redundant arrays(MURAs) are utilized to obtain complex 3D image pairs. To solve the side-lobe noise in images, the interferometry between each image pair is implemented, and compressed sensing(CS) reconstruction is adopted in the frequency domain. Furthermore, to restore the geometrical relationship between each flight, the phase information corresponding to negative MURA is compensated on each single-pass image reconstructed by CS. Finally,by coherent accumulation of each complex image, the high resolution in cross-track direction is obtained. Simulations and experiments in X-band verify the availability.

关键词： three-dimensional(3D)imaging synthetic aperture radar(SAR) sparse flight interferometry compressed sensing(CS)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：