On the Interference Mitigation Based on ADC Parameters Tuning

The function of the front-end of a Global Navigation Satellite System (GNSS) receiver can be roughly described as the provision of received signal samples at Intermediate Frequency (IF) to the base band section. Due to the low power of the received signal, several phenomena might threat the correct operation of the front-end, and consequently degrade the performance of the acquisition and tracking stages. Among them, the interference from external electromagnetic sources is one of the most dangerous, due to the variety of candidates each with different features, that might affect the GNSS signals. This paper aims at presenting an analysis of the different blocks of the receiver chain in terms of performance degradation, due to the presence of wide-band interference. In particular the focus will be on the assessment of the impact of the tuning of the parameters of the analog to digital converter (ADC) on the receiver robustness to interfering sources.