Radio interference effects on commercial GNSS receivers using measured data

Nowadays more and more services rely on the positioning and time synchronization provided by the U.S. Global Positioning System (GPS) which is worldwide available. The requirements on accuracy are increasing with the number of applications using a Global Navigation Satellite System (GNSS). As more systems in transport, communication and other areas are based on GNSS a degradation of performance might lead to unpredictable risks to economy and safety. Man-made radio frequency interference is one of the last remaining challenges which may result in unforeseeable and potentially devastating threats to GNSS positioning. Therefore the German Aerospace Center performed a measurements campaign in 2006. Out of the radio signals recorded a narrowband pulsed interferer, a communication signal and a wideband colored noise process were extracted and modeled. The impact of these interferers on a commercial GPS receiver was studied in hardware simulations. The results are carried out on pseudorange level as bias, variance and distribution of the range estimate.