Study on anti-jamming and signal enhancement algorithms for satellite navigation

Aiming at the problem that power inversion (PI) anti-jamming algorithm can only suppress jamming but can not enhance navigation signal, a cascade spatial anti-jamming algorithm is proposed. Firstly, the parallel power inversion algorithm based on orthogonal subspace projection is used to eliminate the strong interference, and then blind beamforming based on cyclostationarity is used to enhance the navigation signal and further improve SINR. Finally, the effectiveness of this method is verified by simulation.