Long-term Evaluation of Noise and Interference Statistics in GPS L1-band

For wireless systems, interfering signals from the surrounding environment is a serious threat to the performance of the system. A measurement system with the aim to autonomously detect and log interference incidents, particularly in the GPS bands, has been developed and used to collect data. Three measurement systems were placed in various locations at an international airport in Sweden, and have continuously recorded both background noise and interference incidents on GPS L1. In this paper, recordings from measurements performed during one year, starting in November 2019, are presented. Variations in noise levels over both time and between measurement locations have been investigated. All locations showed a diurnal variation in the mean noise power, with slightly higher mean noise at night. In contrast, the number of detected interference incidents were higher during daytime.