Robust Space Time Adaptive Processing Methods for Synthetic Aperture Radar
Abstract
:1. Introduction
2. SAR Simulation Models
2.1. SAR Signal Model
2.2. Jammer and Noise Models
2.3. Basic STAP Method
2.4. Influence of Platform Motion
3. The Piecewise Constrained STAP Based on Sub-Apertures Framework
4. The Piecewise Constrained Generalized Sidelobe Canceller
5. Simulation Result
6. Measured Data Results
7. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Parameters | Value |
---|---|
Carrier frequency (fc) | 10 GHz |
Bandwidth (B) | 200 MHz |
Number of pulses (M) | 1024 / 512 |
Range bins (Mr) | 2048 |
Number of receive channel (N) | 16 |
Element spacing | 0.5 λ |
Range resolution | 1 m |
Azimuth resolution | 1 m |
Velocity (vc) | 150 m/s |
Height of platform (Hc) | 3000 m |
SAR Squint angle (θ0) | 15° |
Range center | 40 km |
Jammer offset/ Direction of jammer(θJ) | 35 km/ 10° |
Jam noise ratio/Signal noise ratio | 20 dB/ 15 dB |
Theoretical Azimuth Resolution | 1.19 m | ||
---|---|---|---|
Item | Number of Sub-Apertures | Conventional Method | Proposed Method |
Simulation Azimuth Resolution | M = 16 | 1.48 m | 1.27 m |
M = 32 | 1.49 m | 1.27 m | |
M = 64 | 1.47 m | 1.27 m | |
Simulation Azimuth PSLR/ISLR | M = 16 | −21.9 dB / −16.4 dB | −25.2 dB / −22.3 dB |
M = 32 | −22.2 dB / −17.7 dB | −25.2 dB / −22.3 dB | |
M = 64 | −22.8 dB / −17.9 dB | −25.2 dB / −22.3 dB |
Item | Conventional Method | Proposed Method |
---|---|---|
Azimuth Resolution | 1.32 m | 1.09 m |
Azimuth PSLR/ISLR | −13.8 dB / −10.6 dB | −23.2 dB / −19.1 dB |
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Shen, S.; Tang, L.; Nie, X.; Bai, Y.; Zhang, X.; Li, P. Robust Space Time Adaptive Processing Methods for Synthetic Aperture Radar. Appl. Sci. 2020, 10, 3609. https://doi.org/10.3390/app10103609
Shen S, Tang L, Nie X, Bai Y, Zhang X, Li P. Robust Space Time Adaptive Processing Methods for Synthetic Aperture Radar. Applied Sciences. 2020; 10(10):3609. https://doi.org/10.3390/app10103609
Chicago/Turabian StyleShen, Shijian, Lan Tang, Xin Nie, Yechao Bai, Xinggan Zhang, and Pin Li. 2020. "Robust Space Time Adaptive Processing Methods for Synthetic Aperture Radar" Applied Sciences 10, no. 10: 3609. https://doi.org/10.3390/app10103609