Abstract: In order to solve the problem of anti-interference of global positioning system (GPS) under the condition of low SNR and strong interference, this paper puts forward the combined power inversion algorithm and phase compensation of anti-interference. The method applies power inversion algorithm of the GPS signal pre-processing to accurately demodulate and further process the the phase compensation of GPS signals to improve the SNR. Simulation results show that the method can effectively restrain the interference, enhance SNR, and improve the anti-interference ability of the receiver.

Key words: global positioning system(GPS), weak signal, the array antenna, power inversion algorithm, anti-interference