JOURNAL OF RADARS
 Home | About Journal | Ethics Statement | Editorial Board | Reviewers | Instruction | Subscriptions | Contacts Us | Chinese
JOURNAL OF RADARS  2015, Vol. 4 Issue (1): 60-69    DOI: 10.12000/JR15007
Paper Current Issue | Next Issue | Archive | Adv Search |
A High-precision Motion Compensation Method for SAR Based on Image Intensity Optimization
Hu Ke-bin Zhang Xiao-ling Shi Jun Wei Shun-jun
(School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)
 Download: PDF (997 KB)   [HTML]( )   Export: BibTeX | EndNote (RIS)      Supporting Info
Abstract 

Owing to the platform instability and precision limitations of motion sensors, motion errors negatively affect the quality of synthetic aperture radar (SAR) images. The autofocus Back Projection (BP) algorithm based on the optimization of image sharpness compensates for motion errors through phase error estimation. This method can attain relatively good performance, while assuming the same phase error for all pixels, i.e., it ignores the spatial variance of motion errors. To overcome this drawback, a high-precision motion error compensation method is presented in this study. In the proposed method, the Antenna Phase Centers (APC) are estimated via optimization using the criterion of maximum image intensity. Then, the estimated APCs are applied for BP imaging. Because the APC estimation equals the range history estimation for each pixel, high-precision phase compensation for every pixel can be achieved. Point-target simulations and processing of experimental data validate the effectiveness of the proposed method.

Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Hu Ke-bin
Zhang Xiao-ling
Shi Jun
Wei Shun-jun
Key wordsSynthetic Aperture Radar (SAR)   High-precision motion compensation   Autofocus back projection   Spatial variance     
Received: 2015-01-16; Published: 2015-03-13
Cite this article:   
Hu Ke-bin,Zhang Xiao-ling,Shi Jun et al. A High-precision Motion Compensation Method for SAR Based on Image Intensity Optimization[J]. JOURNAL OF RADARS, 2015, 4(1): 60-69.
 
No references of article
[1] Wang Siyu, Gao Xin, Sun Hao, Zheng Xinwei, Sun Xian. An Aircraft Detection Method Based on Convolutional Neural Networks in High-Resolution SAR Images[J]. JOURNAL OF RADARS, 2017, 6(2): 195-203.
[2] Wang Yanfei, Liu Chang, Zhan Xueli, Han Song. Technology and Applications of UAV Synthetic Aperture Radar System[J]. JOURNAL OF RADARS, 2016, 5(4): 333-349.
[3] Zhang Zhe, Zhang Bingchen, Hong Wen, Wu Yirong. Accelerated Sparse Microwave Imaging Phase Error Compensation Algorithm Based on Combination of SAR Raw Data Simulator and Map-drift Autofocus Algorithm[J]. JOURNAL OF RADARS, 2016, 5(1): 25-34.
[4] Guo Zhen-yu, Lin Yun, Hong Wen. A Focusing Algorithm for Circular SAR Based on Phase Error Estimation in Image Domain[J]. JOURNAL OF RADARS, 2015, 4(6): 681-688.
[5] Ding Zhen-yu, Tan Wei-xian, Wang Yan-ping, Hong Wen, Wu Yi-rong. Yaw Angle Error Compensation for Airborne 3-D SAR Based on Wavenumber-domain Subblock[J]. JOURNAL OF RADARS, 2015, 4(4): 467-473.
[6] Zhan Xue-li, Wang Yan-fei, Wang Chao, Li He-ping. A Digital Dechirp Approach for Synthetic Aperture Radar[J]. JOURNAL OF RADARS, 2015, 4(4): 474-480.
[7] Li Yang, Lin Yun, Zhang Jing-jing, Guo Xiao-yang, Chen Shi-qiang, Hong Wen. Estimation and Removing of Anisotropic Scattering for Multiaspect Polarimetric SAR Image[J]. JOURNAL OF RADARS, 2015, 4(3): 254-264.
[8] Xu Cheng-bin, Zhou Wei, Cong Yu, Guan Jian. Ship Analysis and Detection in High-resolution Pol-SAR Imagery Based on Peak Zone[J]. JOURNAL OF RADARS, 2015, 4(3): 367-373.
[9] Zhou Hui, Zhao Feng-jun, Yu Wei-dong, Yang Jian. SAR Imaging of Ground Moving Targets with Non-ideal Motion Error Compensation(in English)[J]. JOURNAL OF RADARS, 2015, 4(3): 265-275.
[10] Zhao Yu-lu, Zhang Qun-ying, Li-Chao, Ji Yi-cai, Fang Guang-you. Vibration Error Analysis and Motion Compensation of Video Synthetic Aperture Radar[J]. JOURNAL OF RADARS, 2015, 4(2): 230-239.
[11] Zhan Xue-li, Wang Yan-fei, Wang Chao, Liu Bi-dan. Research on Overlapped Subaperture Real-time Imaing Algorithm for Pulse Compression Airborne Strip SAR System[J]. JOURNAL OF RADARS, 2015, 4(2): 199-208.
[12] Luo Xiu-lian,Xu Wei,Guo Lei. The Application of PRF Variation to Squint Spotlight SAR[J]. JOURNAL OF RADARS, 2015, 4(1): 70-77.
[13] Xing Xiang-wei,Ji Ke-feng,Kang Li-hong,Zhan Ming. Review of Ship Surveillance Technologies Based on High-Resolution Wide-Swath Synthetic Aperture Radar Imaging[J]. JOURNAL OF RADARS, 2015, 4(1): 107-121.
[14] Wang Wen-qin,Cheng Sheng-juan,Shao Huai-zong. MIMO-OFDM Chirp Waveform Diversity Design and Implementation Based on Sparse Matrix and Correlation Optimization[J]. JOURNAL OF RADARS, 2015, 4(1): 1-10.
[15] Yan Jian, Li Yang, Yin Qiang, Hong Wen. Freeman-Durden Decomposition with Oriented Dihedral Scattering[J]. JOURNAL OF RADARS, 2014, 3(5): 574-582.
 

Copyright © 2011 JOURNAL OF RADARS
Support by Beijing Magtech Co.Ltd   E-mail:support@magtech.com.cn