Abstract:

Space time adaptive processing (STAP) is applied to global position system (GPS) receiver in order to gain signal and suppress interference. But the STAP structure may distort GPS signals and affect the positioning accuracy. The correlation function between output GPS signal of STAP and the reference signal is derived, and the effect of STAP on code tracking loop is analyzed. The distortion of correlation function is corrected by using the proposed reference signal in code tracking loop, and the degradation of code tracking accuracy caused by STAP can be reduced. Simulation and experimental results show the effectiveness of the proposed algorithm.