The Research on GPS Frequency Domain Anti-jamming Algorithms

GPS frequency domain anti-jamming technique can suppress partial spectrum jamming effectively; A novel adaptive threshold acquire method is presented in GPS frequency domain anti-jamming algorithms; compared the performance of three frequency domain threshold notch algorithms and frequency domain adaptive filter anti-jamming algorithm under the different ratio of jamming bandwidth to signal bandwidth; the performance of adaptive filter anti-jamming algorithm and zero value notch frequency domain threshold algorithm are better than mean value notch frequency domain threshold algorithm and white noise value notch frequency domain threshold algorithm; in the end, the performance of the frequency domain algorithms under different SNR is simulated; the simulation results show, that if SNR is better than -15dB, frequency domain anti-jamming algorithms can suppress partial spectrum jamming effectively.