Reduced-Rank Space-Time Processing for Anti-Jamming GPS Receivers

In a jamming environment with multiple wideband and narrowband jammers,global positioning system(GPS)receivers can use space-time processing to efficiently suppress the jamming.However,the computational complexity of space-time algorithms restricts their application in practical GPS receivers.This paper describes a reduced-rank multi-stage nested Wiener filter(MSNWF)based on subspace decomposition and Wiener filter(WF)to eliminate the effect of jamming in anti-jamming GPS receivers.A general sidelobe canceller(GSC)structure that is equivalent to the MSNWF is used to facilitate calculation of the optimal weights for the space-time processing.Simulation results demonstrate the satisfactory performance of the MSNWF to cancel jamming and the significant reduction in computational complexity by the reduced -rank processing.The technique offers a feasible space-time processing solution for anti-jamming GPS receivers.