Journal of Infrared and Millimeter Waves, Volume. 43, Issue 6, 775(2024)
DIFNet: SAR RFI suppression network based on domain invariant features
Figures & Tables(14)
Fig. 6. Time frequency spectrogram：（a）interfered time-frequency spectrogram in same-sensor experiment；（b）time frequency spectrogram by notch filtering；（c）time frequency spectrogram by PISNet；（d）the time-frequency spectrogram by DIFNet
Fig. 7. Suppression results in MiniSAR：（a）interfered image；（b）label；（c）result by notch filtered；（d）result by PISNet；（e）result by DIFNet
Fig. 8. Time-frequency spectrogram in cross-sensor experiment：（a）interfered time-frequency spectrogram；（b）notch filtering result；（c）DIFNet filtering result
Fig. 9. Cross-sensor results in Sentinel-1：（a）interfered image，ME=3.40；（b）notch filtering image，ME=2.34；（c）DIFNet filtering image，ME=2.19
Table 1. DIFNet’s pipeline
View tableView in ArticleTable 1. DIFNet’s pipeline
Algorithm I：DIFNet’s pipeline
1. Detect RFI in SAR images；
2. Perform STFT pulse-by-pulse；
3. Predict RFI by DIFNet；
4. Subtract RFI；
5. Perform ISTFT pulse-by-pulse；
6. Convert SAR echoes into SAR images.
Table 2. Radar parameters of training and testing Data
View tableView in ArticleTable 2. Radar parameters of training and testing Data
Data
Parameters
Training data Same-sensor
experiments
Cross-sensor
experiments
Source MiniSAR MiniSAR Sentinel-1A Band X-band X-band C-band Bandwidth 1.5 GHz 1.5 GHz 100 MHz Polarization mode HH HH VV/VH
Table 3. Interference parameters in MiniSAR
View tableView in ArticleTable 3. Interference parameters in MiniSAR
Bandwidth
Parameters
Narrowband Broadband Interference bandwidth <30 MHz 30 MHz~150 MHz SIR -15 dB~0 dB -15 dB~0 dB Interference source 2 3~5
Table 4. Same-sensor Result
View tableView in ArticleTable 4. Same-sensor Result
Methods
Indicators
Interfered image Notch filtering PISNet DIFNet PA / 94.95% / 96.55% IoU / 74.41% / 80.40% PSNR/dB 11.36 21.49 25.05 23.51 ME 0.24 0.09 0.04 0.04
Table 4. Cross-sensor Result
View tableView in ArticleTable 4. Cross-sensor Result
Parameters
Indicators
Interfered image Notch filtering DIFNet PA / 92.67% 94.56% IoU / 78.63% 81.23% ME 3.40 2.34 2.19
Tools
Get Citation
Copy Citation Text
Wen-Hao LV, Fu-Ping FANG, Yuan-Rong TIAN. DIFNet: SAR RFI suppression network based on domain invariant features[J]. Journal of Infrared and Millimeter Waves, 2024, 43(6): 775
Paper Information
Category: Millimeter Wave and Terahertz Technology
Received: Mar. 26, 2024
Accepted: --
Published Online: Dec. 13, 2024
The Author Email: Fu-Ping FANG (capkoven@mail.ustc.edu.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20