Beamforming Technique in Anti-Jamming Compass Receiver by Exploitation of Cyclostationarity

 Although many antijamming methods in space domain have been proposed for satellite systems in the literature, they require the prior knowledge of DOA and reference signals, or cannot output optimal SINR since those algorithms suppressed both the desired signal and interference, or cannot mitigate the manmade interference. To counter the problems above, a novel blind beamforming method based on cyclostationarity of satellite signal is proposed in this paper for antijamming Compass Receiver. First, the cyclostationarities of compass signal and manmade interference are analyzed in the paper. An objective function based on the analysis results is constructed for the proposed method. Finally, the Lagrange method is used to obtain the solution. Compared with the existing methods, the proposed algorithm need not the prior knowledge of DOA and reference signals, can obtain the optimal array gains, and can suppress both the white noise interference and manmade intergerence. Theoretical analysis and simulation results are provided to show the effectiveness of the proposed method.