Résumé:
Today, the problem of global navigation satellite
system (GNSS) positioning in urban canyons has received considerable attention in several field, such as transport and emergency
systems. However, the performances of GNSS-based systems can
be degraded in urban areas due to non-line-of-sight (NLOS),
Multipath and masking effects.
In this paper, we aim to explore the potential of RHCP, LHCP
antennas technology and the fuzzy logic method for identifying
GNSS signal reception state. The fuzzy system developed has
based on the satellite elevation and the C/N0-R-L, which is the
difference between the left-hand circular polarized (LHCP) C/N0
(carrier-to-noise ratio) and the right-hand circular polarized
(RHCP) C/N0.
A signal reception state classification by applying the proposed
system is demonstrated on a real global positioning system (GPS)
signal, and the efficiency of the classifier is shown.
Index Terms—GNSS systems; GPS, line-of-sight (LOS); NLOS;
Multipath; classification; fuzzy logic system; RHCP antenna;
LHCP Antenna; urban area
