Design and Test of an Interference Canceller for a GPS/GLONASS User's Navigation Equipment

This research is aimed at the elaboration of a mockup interference canceller in the user's navigation equipment receiver. Such canceller with the help of signals non-linear processing will allow cancelling interferences with a random angular modulation that are much more powerful than navigation signals. The operation of the device being elaborated will consist in a significant increase of the signal/interference ratio at its output. In the end, it will result in the improvement of the navigation receiver immunity to interferences. The article dwells on the issues of the interference canceller realization in a standard navigation receiver by means of the analogue processing. We performed the analysis of the variants of the integration of the device being elaborated in the navigation receiver. The experimental investigation showed that the interference canceller allows increasing the interference-to-signal threshold ratio by 35 dB both for narrow-band and wide-band interference.