Joint suppression of radio frequency interference and lightning impulsive noise in HFSWR

The high-frequency surface wave radar (HFSWR) is known to suffer from the co-channel radio frequency interference (RFI) and lightning impulsive noise. Though the suppression techniques for individual interference mechanism have been developed, the simultaneous appearance of two types of interference still presents some challenges as the existence of lightning will affect the application of optimal mitigation scheme for co-channel RFI. In this paper, an adaptive beamforming based processing scheme is proposed which can provide better cancellation for the combination of two interference mechanisms. The performance of the proposed method is verified by using the experimental HFSWR data.