A Novel Space-Borne Antenna Nulling Method Based on Multi-target Direction Finding Algorithm

To be sure that the telecommunication satellite can work well in the complexity electromagnetic environment and electromagnetic jamming, a novel space-borne antenna multi-jamming direction finding and nulling method is presented in the paper. Firstly, single-snapshot DOA estimation algorithm in frequency is presented to estimate the DOAs of multiple interferences, and then nulling algorithm that keep the shape of the main-lobe is implemented according to the prior accurately estimated DOA compared with conventional sidelobe cancelling algorithm, the presented algorithm solves the problems of both nulling depth and main-lobe shape keeping nicely. Simulation results and performance analysis demonstrate that the proposed antenna nulling algorithm is effective and feasible.