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| Citation: | Zhou Chunhui, Li Fei, Li Ning, Zheng Huifang, Wang Xiangyu. Modified Eigensubspace-based Approach for Radio-frequency Interference Suppression of SAR Image[J]. Journal of Radars, 2018, 7(2): 235-243. doi: 10.12000/JR17025
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Modified Eigensubspace-based Approach for Radio-frequency Interference Suppression of SAR Image
doi: 10.12000/JR17025
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Abstract
Radio-Frequency Interference (RFI) adversely affects useful signals, thereby seriously affecting image quality. In this study, a modified eigensubspace-based approach for radio-frequency interference suppression of Synthetic Aperture Radar (SAR) images is proposed. In the preprocessing stage of our proposed algorithm, RFI detection is conducted in both the frequency and time domains. Subsequently, we can only deal with the data containing the RFI via the traditional eigensubspace-based approach. Compared with the traditional eigensubspace-based approach, our proposed algorithm can function more efficiently and effectively. -
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References
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- Figure 1. The range direction spectrum of the measured data obtained by an airborne SAR system working at L-band
- Figure 2. Average range direction spectrum of Fig. 1
- Figure 3. Main flowchart of main steps of proposed approach
- Figure 4. Imaging results of point target via traditional eigensubspace-based approach
- Figure 5. Imaging results of point target via modified eigensubspace-based approach
- Figure 6. Original full SAR image containing RFI
- Figure 7. Results of contrast experiment of area “A” in Fig. 6
- Figure 8. The results of the contrast experiment of the area “B” in Fig. 6