Innovative interference mitigation approaches: Analytical analysis, implementation and validation

This paper focuses the attention on the problem of Radio Frequency Interference (RFI) mitigation in the framework of GNSS. The paper concentrates on interference mitigation algorithms to be applied within the digital part of a GNSS receiver. The first part of the paper focuses on the mitigation of RFI based on Wavelets. The theoretical fundamentals of the approach are presented, introducing the continuous and the discrete wavelet transformations, and its application to the mitigation of pulsed interferences is demonstrated. The mitigation of strong pulses as well as of low power Distance Measurement Equipment (DME) pulses is discussed and the results obtained for both the cases are presented. In the second part of the paper the mitigation of Continuous Wave Interference (CWI) by means of Notch Filtering is studied, presenting the fundamental steps of this method and presenting its benefits by means of simulation results.