Jamming monitoring and anti-jamming by polarization diversity reception in the satellite navigation system

摘要

The satellite navigation system adopts the spread spectrum technology, and the navigation signal is 20 dB lower than the mechanical thermal noise at the receiver. The wireless communication signal and the TV broadcast signal in the electromagnetic environment can be taken as the jamming to the satellite navigation system. The circular array with vertical polarization elements and horizontal polarization elements is designed in the paper. Based on the direction of the jamming estimated, the polarization diversity reception is performed by the beamforming with the array element selection. The polarization diversity reception which is the same polarization compared to the jamming can perform the jamming monitoring and the analysis. The polarization diversity reception which is orthogonally polarized compared to the jamming can realized the anti-jamming, ensuring the use of the satellite navigation.