Narrowband RFI Suppression for Phase Synchronization of BiSAR Based on Robust Principal Component Analysis

Abstract:
In a bistatic SAR system operating in the low-frequency band such as LuTan-1, radio frequency interference (RFI) is becoming a significant issue in phase synchronization. To solve this problem, this paper proposes a novel algorithm to suppress the narrowband interferences (NBIs) in the synchronization links based on robust principal component analysis (RPCA).We first give the 2-D signal model contaminated by the NBIs in phase synchronization. Then, the characteristics of the signals are analyzed, satisfying the constraint conditions of RPCA. Finally, the novel RFI suppression algorithm is proposed. Simulation and experimental results validate the superiority of the proposed algorithm.