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| Non-linear Signal Processing for FMCW SAR |
| Dong Yong-wei①②; Liang Xing-dong①; Ding Chi-biao① |
| ①National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; ②Graduate University of Chinese Academy of Sciences, Beijing 100039, China |
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Abstract The inherent errors of radar system degrade seriously the performance of Synthetic Aperture Radar(SAR), and these errors should be calibrated to acquire high quality images. In this paper, to the issue of the impact of system errors and non-linearities in FMCW SAR, models of system errors are established, and then the estimation and calibration of system errors are investigated in detail. An improved non-linear high resolution range-Doppler algorithm for FMCW SAR is proposed, according to the requirements of mini-architecture and real-time in FMCM SAR imaging systems. Finally, the feasibility and validity of the presented algorithm is demonstrated with simulation.
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Received: 24 April 2009
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Corresponding Authors:
Dong Yong-wei
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2010, Vol. 32 
