GLRT for two moving target models in multi-aperture SAR imagery

2012 ◽  
Author(s):  
M. Dragosevic
Keyword(s):  
Moving Target ◽  
Sar Imagery

Moving Target Focusing in SAR Imagery Based on Subaperture Processing and DART

2020 ◽  
pp. 1-5 ◽  
Author(s):  
Penghui Huang ◽  
Jingtao Ma ◽  
Huajian Xu ◽  
Xingzhao Liu ◽  
Xue Jiang ◽  
...  
Keyword(s):  
Moving Target ◽  
Sar Imagery

Ground Moving Target Refocusing in SAR Imagery Based on RFRT-FrFT

2019 ◽  
Vol 57 (8) ◽  
pp. 5476-5492 ◽  
Author(s):  
Penghui Huang ◽  
Xiang-Gen Xia ◽  
Yesheng Gao ◽  
Xingzhao Liu ◽  
Guisheng Liao ◽  
...  
Keyword(s):  
Moving Target ◽  
Sar Imagery

scholarly journals Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Chao Chen ◽  
Yan Li ◽  
Kuihua Huang ◽  
Yonghong Long ◽  
Linlin Zhang ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Fractional Fourier Transform ◽  
Velocity Estimation ◽  
Moving Target ◽  
Chirp Rate ◽  
Target Imaging ◽  
Moving Target Imaging ◽  
Sar Imagery ◽  
Interferometric Sar ◽  
Along Track

Synthetic aperture radar (SAR) was originally exploited to image stationary scenes. However, it is important to derive target information of velocity for many applications. The fractional Fourier transform (FrFT) is a generalization of the classical Fourier transform and is well-known as a useful tool to estimate the chirp rate of linear frequency-modulated (LFM) signals. Motion compensation is critical to moving target imaging. It is difficult for us to obtain the actual motion parameters in real scenarios. Based on the moving target echo model in airborne along-track interferometric SAR (ATI-SAR) and expression of the ATI phase, a method is proposed to estimate the ship velocity by combining the ATI phase with FrFT. First, we use the FrFT to evaluate the chirp rate of the moving target echo. Then, we construct an equation to estimate the ship velocity using the chirp rate estimation, peak response time, and ATI phase. Finally, the simulation experiments are used to validate the effectiveness of the proposed method.

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