Narrow-Band Interference Suppression Algorithm on BDS Based on Side Correlation Replacement

A new algorithm referring to the spectrum symmetry of Beidou satellite navigation system (BDS) is proposed. Then narrow-band interference was eliminated by replacing the contaminated spectrum replacement parts with the unpolluted spectrum, and for the symmetric interference spectrum line, it is set to zero, in order to achieve the purpose of restoring the original signal to the greatest extent. Simulation results show that this method extends the conventional sideband related the application range of the displacement method and its performance is superior to the conventional method of transform domain interference zeros.