Moving target imaging using ultrawideband synthetic aperture radar

2003 ◽  
Author(s):  
Hanwei Guo ◽  
Diannong Liang ◽  
Yan Wan ◽  
Xiaotao Huang ◽  
Zhen Dong
Keyword(s):  
Synthetic Aperture Radar ◽  
Synthetic Aperture ◽  
Moving Target ◽  
Target Imaging ◽  
Moving Target Imaging ◽  
Aperture Radar

Moving Target Imaging for Synthetic Aperture Radar Via RPCA

2021 ◽  
Author(s):  
Sean Thammakhoune ◽  
Bariscan Yonel ◽  
Eric Mason ◽  
Birsen Yazici ◽  
Yonina C. Eldar
Keyword(s):  
Synthetic Aperture Radar ◽  
Synthetic Aperture ◽  
Moving Target ◽  
Target Imaging ◽  
Moving Target Imaging ◽  
Aperture Radar

scholarly journals Ground Moving Target Imaging and Analysis for Near-Space Hypersonic Vehicle-Borne Synthetic Aperture Radar System with Squint Angle

2018 ◽  
Vol 10 (12) ◽  
pp. 1966 ◽  
Author(s):  
Zhanye Chen ◽  
Yu Zhou ◽  
Linrang Zhang ◽  
Chunhui Lin ◽  
Yan Huang ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Phase Error ◽  
Hypersonic Vehicle ◽  
Synthetic Aperture ◽  
Moving Target ◽  
Near Space ◽  
Sensing Applications ◽  
Target Imaging ◽  
Moving Target Imaging ◽  
Aperture Radar

Near space is the key to integrating “sky” and “space” into the future. A synthetic aperture radar (SAR) that works in this area would initiate a technological revolution for remote sensing applications. This study mainly focused on ground moving target imaging (GMTIm) for a near-space hypersonic vehicle-borne SAR (NS-HSV-SAR) with squint angle. The range history, parameter coupling, and Doppler ambiguity of the squint-looking NS-HSV-SAR are more complicated than traditional side-looking airborne or space-borne SARs. Thus, a precise range model is presented on the basis of phase error analyses. Then, all potential distributions of echo’s azimuth spectrum are derived, and a GMTIm method is proposed on the basis of a detailed analysis of the echo characteristics. The proposed method consists of three steps. Firstly, a prior information-based pre-processing function was created to decrease the Doppler ambiguity and range migration effects. Secondly, a blur matched keystone transform was developed to correct the residual range walk migration. Thirdly, a time-saving chirp Fourier transform was investigated for azimuth focusing. Implementation considerations, including the curvilinear trajectory of the NS-HSV-SAR, multiple moving target imaging, and applicability and limitation of the method, are discussed. Finally, simulation results are presented to validate the effectiveness of the proposed method.

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