Multipath detection metrics and attenuation analysis using a GPS snapshot receiver in harsh environments

This paper focuses on the analysis of GPS L1 signals when propagating indoors. Two criteria are proposed with the aim of detecting the presence of multipath, which is one of the major degradations experienced by GPS receivers when operating in indoor environments. The proposed criteria have been evaluated through an exhaustive field test by using a high sensitivity GNSS software receiver. The results confirm the validity of these criteria and allow a better understanding of the underlying propagation phenomena of GPS signals.