Joint Time-Frequency Domain Interference Mitigation for Galileo L1 Band Receivers

In this paper we address the problem of interference mitigation (IM) for the Galileo system. In particular, a joint domain technique is investigated by coupling the mitigation effects in both time and frequency dimensions, against interference concurrently variable in more than one domain. The proposed technique is based on an open loop adaptive filter, which creates an infinite notch in correspondence of the instantaneous frequency of the jamming, and adapts with its variations. The novelty of the paper lies in the applications of these IM techniques to the Galileo BOC modulated signal, providing interesting tradeoffs along with an original analytical characterization of the output signal-to-interference-plus-noise ratio