ADAPTIVE ANTIJAMMING BASED ON SPACE-TIME 2-D SPARSE ARRAY FOR GNSS RECEIVERS

Space-time adaptive antijamming problem has received significant attention recently for global navigation satellite system (GNSS). It can jointly utilize spatial filters and temporal filters to suppress interference signals. However, most of the works on space-time antijamming problem presented in the literature require a space-time two-dimension (2-D) array with multiple antennas and delay taps. In this paper, an effective adaptive antijamming method based on a space-time 2-D sparse array is proposed. The maximum array gain is utilized to construct a space-time 2-D sparse array. The spacetime antijamming weight vector is given by minimizing the 2-D sparse array output power. Compared with the previous works, the presented method can have better antijamming performance than a spacetime 2-D uniform array. Simulation results verify the effectiveness and feasibility of the proposed method.