Compressive Sensing for Jamming Signal Suppression and Restoration in Bistatic SAR

Synthetic aperture radar (SAR) is widely used in both civilian and military applications because of its ability to acquire imaging information pertaining to an observed area, regardless of weather conditions. However, it faces the challenge of reduced image quality due to radiofrequency interference (jamming). Recent studies on bistatic SAR, wherein the transmitter and receiver operate independently, have shown that the jamming signal can be weakened during reception because of the varied paths required to reach the receiver. Additionally, ground-based jammers may not accurately locate the receiver, resulting in a reduced impact of the jamming signal compared to monostatic SAR. This paper proposes a method to eliminate signals affected by jamming, leveraging the characteristics of bistatic SAR received signals. By suppressing the jamming signal and applying compressed sensing techniques to restore the lost signals, the proposed method achieves improved signal quality. Verification of the proposed method via simulations is also presented.