scholarly journals An Adaptive Moving Target Imaging Method for Bistatic Forward-Looking SAR Using Keystone Transform and Optimization NLCS

Sensors ◽  
2017 ◽  
Vol 17 (12) ◽  
pp. 216 ◽  
Author(s):  
Zhongyu Li ◽  
Junjie Wu ◽  
Yulin Huang ◽  
Haiguang Yang ◽  
Jianyu Yang
Keyword(s):  
Imaging Method ◽  
Moving Target ◽  
Keystone Transform ◽  
Target Imaging ◽  
Moving Target Imaging ◽  
Forward Looking

scholarly journals An Efficient Ground Moving Target Imaging Method for Airborne Circular Stripmap SAR

2022 ◽  
Vol 14 (1) ◽  
pp. 210
Author(s):  
Yongkang Li ◽  
Tianyu Huo ◽  
Chenxi Yang ◽  
Tong Wang ◽  
Juan Wang ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Numerical Experiments ◽  
High Accuracy ◽  
Synthetic Aperture ◽  
Imaging Method ◽  
Moving Target ◽  
Target Imaging ◽  
Moving Target Imaging ◽  
Range Equation ◽  
Azimuth Resolution

This paper studies the imaging of a ground moving target with airborne circular stripmap synthetic aperture radar (CSSAR). First, the range equation of a target moving with accelerations is developed. Then, a new range model of high accuracy is proposed, since the commonly used second-order Taylor-approximated range model is inaccurate when the azimuth resolution is relatively high or the target moves with accelerations. The proposed range model also makes it easy to derive an accurate analytical expression for the target’s 2-D spectrum. Third, based on the proposed range model, the target’s 2-D spectrum is derived and an efficient imaging method is proposed. The proposed imaging method implements focusing via a phase multiplication in the 2-D frequency domain and utilizes the genetic algorithm to accomplish an efficient search of the parameters of the proposed range model. Finally, numerical experiments are conducted to validate the proposed range model and the proposed imaging method.

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