Anti-jamming technique using improved FADP filter

In order to improve the anti-jamming performance in global navigation satellite system (GNSS) receivers, an improved anti-jamming technique based on frequency-spectrum amplitude domain processing (FADP) filter is proposed, which is more robust. Firstly, an overlap windowed fast Fourier transform (FFT) is used to relieve the spectrum leakage. Then, according to the analysis of the differences between the statistical characteristics of the time-domain waveform and spectrum data, a new mathematical function of amplitude domain processing (ADP) is designed. Meanwhile, a simplification of the procedures save the computation resources in some way. Finally, based on the GPS software receiver platform, experiments comparing the improved FADP with the original FADP verify that the improved method has stronger suppression ability and smaller insertion loss than the orginal one on non-Gaussian interference.