Spatial temporal and frequency methods to mitigate interference in HF surface wave radar

In this paper, the spatial, temporal and frequency techniques to suppress interference in HF surface wave radar are presented. By exploiting the characteristics of the co-channel interference and deliberately selecting the secondary data, the proposed methods can effectively suppress both stationary and non-stationary interference. For most practical applications, the proposed interference suppression techniques can be combined to improve the interference mitigation performance of HFSWR. Furthermore, the adaptive operating frequency selection method can improve not only the interference rejection performance of HFSWR but also the frequency utilizable efficiency of the user congested HF band. The experimental results show that the proposed methods can effectively suppress the interference