A Frequency-Domain Imaging Algorithm for Translational Variant Bistatic Forward-Looking SAR

Mei Haiwen; Li Yachao; Xing Mengdao; Quan Yinghui; Wu Chunfeng

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A Frequency-Domain Imaging Algorithm for Translational Variant Bistatic Forward-Looking SAR

机译：一种转化变体双向前瞻性SAR的频域成像算法

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Bistatic forward-looking synthetic aperture radar (BFSAR) breaks through the limitations of the conventional monostatic SAR on the forward-looking imaging. However, the problems of range cell migration (RCM) caused by the linear range walk and 2-D spatial variability of Doppler parameters become more serious and complicated in translational variant BFSAR. In this article, a keystone transform is introduced to correct the linear RCM. Based on the characteristics of a small aperture, the nonlinear chirp scaling (NCS) is discussed in the frequency domain to equalize the azimuth-range-dependent Doppler parameters. The improved NCS in our newly proposed BFSAR imaging algorithm, especially the re-definition of range direction and the model of spatial variant phase, differentiates this article from all the existing studies in the literature on BFSAR signal processing. Simulation results and real data processing further validate the effectiveness of the proposed algorithm.

机译：双面前瞻性的合成孔径雷达（BFSAR）通过传统的单体SAR对前瞻性成像的局限性。然而，由线性范围步行引起的范围细胞迁移（RCM）和多普勒参数的2-D空间可变性引起的范围细胞迁移（RCM）变得更加严重，在转化变体BFSAR中变得更加严重。在本文中，引入了梯形转换以纠正线性RCM。基于小光圈的特性，在频域中讨论非线性啁啾缩放（NCS）以均衡方位范围依赖的多普勒参数。在我们新提出的BFSAR成像算法中的改进的NCS，特别是重新定义范围方向和空间变体阶段的模型，将本文与文献中的所有现有研究区分开来，在文献中的所有现有研究中对BFSAR信号处理。仿真结果和实际数据处理进一步验证了所提出的算法的有效性。

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《IEEE Transactions on Geoscience and Remote Sensing》 |2020年第3期|1502-1515|共14页
作者
Mei Haiwen; Li Yachao; Xing Mengdao; Quan Yinghui; Wu Chunfeng;
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作者单位

Xidian Univ Natl Lab Radar Signal Proc Xian 710071 Peoples R China|Xidian Univ Collaborat Innovat Ctr Informat Sensing & Underst Xian 710071 Peoples R China;

Xidian Univ Natl Lab Radar Signal Proc Xian 710071 Peoples R China|Xidian Univ Collaborat Innovat Ctr Informat Sensing & Underst Xian 710071 Peoples R China;

Xidian Univ Natl Lab Radar Signal Proc Xian 710071 Peoples R China|Xidian Univ Collaborat Innovat Ctr Informat Sensing & Underst Xian 710071 Peoples R China;

Xidian Univ Natl Lab Radar Signal Proc Xian 710071 Peoples R China|Xidian Univ Collaborat Innovat Ctr Informat Sensing & Underst Xian 710071 Peoples R China;

Chengdu Aerosp Sci & Technol Microelect Syst Res Inst Chengdu 610015 Peoples R China;

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正文语种 eng
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关键词
Imaging; Azimuth; TV; Synthetic aperture radar; Doppler effect; Transmitters; Frequency-domain analysis; Coupling characteristic; nonlinear chirp scaling (NCS); space variance; translational variant bistatic forward-looking synthetic aperture radar (TV BFSAR);

机译：成像;方位角;电视;合成孔径雷达;多普勒效应;发射器;频域分析;耦合特性;非线性啁啾缩放（NCS）;空间方差;太空方差;转换变体的双孔前瞻性合成孔径雷达（电视BFSAR）;

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专利

1. A Frequency-Domain Imaging Algorithm for Translational Invariant Bistatic Forward-Looking SAR [J] . Junjie WU, Jianyu YANG, Yulin HUANG, IEICE Transactions on Communications . 2013,第2期

机译：平移不变双基地前视SAR的频域成像算法
2. Focusing of translational variant bistatic forward-looking SAR with Chirp-Z transform [J] . Liu H., Zhou J., Fu Q. Journal of Electromagnetic Waves and Applications . 2013,第12期

机译：使用Chirp-Z变换聚焦变型双基地前瞻性SAR
3. An Omega-$k$ Imaging Algorithm for Translational Variant Bistatic SAR Based on Linearization Theory [J] . Li Z., Wu J., Yi Q., IEEE Geoscience and Remote Sensing Letters . 2014,第3期

机译：基于线性化理论的平移双基地SAR Omega- $ k $成像算法
4. A New Nonlinear Chirp Scaling Algorithm for Translational Variant Bistatic Forward-Looking SAR with Dive Trajectory [C] . Haiwen Mei, Yachao Li, Mengdao Xing, Asia-Pacific Conference on Synthetic Aperture Radar . 2019

机译：具有潜水轨迹的平移变态双基地前视SAR的新型非线性线性调频缩放算法
5. Polar format algorithm with phase correction for bistatic SAR. [D] . Murugesan, Senthil Prasad. 2005

机译：用于双基地SAR的具有相位校正的极坐标格式算法。
6. An Improved RD Algorithm for Maneuvering Bistatic Forward-Looking SAR Imaging with a Fixed Transmitter [O] . Yue Yuan, Si Chen, Huichang Zhao 2017

机译：固定发射器操纵双基地前视SAR成像的改进RD算法
7. Focusing Translational Variant Bistatic Forward-Looking SAR Using Keystone Transform and Extended Nonlinear Chirp Scaling [O] . Junjie Wu, Zhichao Sun, Zhongyu Li, 2016

机译：利用Keystone变换和扩展非线性Chirp scaling聚焦平移变量双基地前视saR

A Frequency-Domain Imaging Algorithm for Translational Variant Bistatic Forward-Looking SAR

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