With this study it is intended to define and evaluate digital processing techniques and algorithms for interference mitigation, derived from the NBIIC, PIWIC-TD and PIWIC-TFD concepts, as well as to evaluate techniques for interference mitigation at RF FE.

Given that a navigation signal is weak when received by a GNSS receiver on earth it can be easily interfered by other signals. Field campaigns, performed up to now, at numerous locations, have shown that the level of interference in Galileo E5 and E6 could be, quite often, significantly higher than the typical level of interference in Galileo E1. In the frame of the ESA GSP activity Interference Information Systems (IIS) several concepts for interference mitigation were proposed and preliminary assessed from a theoretical and conceptual perspective; amongst them the following:1. Narrow-Band Interference Identification and Cancellation (NBIIC) concept2. Pulsed-Interference Wavelets-based Identification and Cancellation (PIWIC-TD) in time domain concept3. Pulsed-Interference Wavelets-based Identification and Cancellation (PIWIC-TFD) in time frequency domain conceptThe work to end with concrete techniques and algorithms (of feasible real time implementation) for a ground sensor station from the NBIIC, PIWIC-TD and PIWIC-TFD concepts is still to be carried out.Furthermore as the characteristics of the RF FE contribute visibly to the interference rejection capabilities, the activity will asses potential new designs/techniques for the RF FE. The aims of this activity will be: 1. To develop a detailed definition of techniques and algorithms for a ground sensor station based on the:1.1. NBIIC concept1.2. PIWIC-TD concept1.3. PIWIC-TFD concept 2. To investigate potential new design/techniques for the RF-FE3. To evaluate, via analyses and simulations, the benefits of the developed techniques and algorithms (see 1)4. To perform, in a real scenario, a proof of concept of the developed techniques and algorithms capabilities.