An anti-jamming algorithm for GPS adaptive nulling antenna based on colored loading

Solving the problem of jamming signals exerts great influence on preserving high precision of GPS navigation signals despite antenna vibration and a variety of jamming sources. We present an anti-jamming algorithm for adaptive nulling antenna based on colored loading. The algorithm constructs the colored correction matrix with array vector and direction vector and gets the final filter weights through the correction matrix. We analyze three aspects of algorithm performance: beamforming, mismatch and different numbers of snapshots. The simulation results and their analysis show preliminarily that the method can obtain wider and deeper null, even when jamming signal has angle deviation and can still get better suppression. It gets better output SINR with the same snapshots.