The carrier-multipath observable: a new carrier-phase multipath mitigation technique

Carrier phase analysis to mitigate multipath effect

Although researchers have devised different methods to detect and correct effects of multipath, it remains one of the challenges in navigation receiver design. This paper explores the phase variations of the incoming carrier in the presence of multipath in GPS signals. Due to this change, while tracking an incoming signal, energy is shifted from the I channel to the Q channel. A novel technique...

Mitigation of GPS Code and Carrier Phase Multipath Effects Using a Multi-Antenna System

Characteristics of the BDS Carrier Phase Multipath and Its Mitigation Methods in Relative Positioning

The carrier phase multipath effect is one of the most significant error sources in the precise positioning of BeiDou Navigation Satellite System (BDS). We analyzed the characteristics of BDS multipath, and found the multipath errors of geostationary earth orbit (GEO) satellite signals are systematic, whereas those of inclined geosynchronous orbit (IGSO) or medium earth orbit (MEO) satellites ar...

Mitigation of Static Carrier Phase Multipath Effects Using Multiple Closely-Spaced Antennas

The effect of carrier phase multipath in static mode is investigated and a system is developed to reduce the effect using multiple closely-spaced antennas. The correlated nature of multipath, along with the known geometry among the antennas, are used with the measured relative carrier phase differences to aid in the extraction of the direct carrier phase from the multipath-corrupted carrier pha...

Mitigation of GPS Carrier Phase Multipath Effects in Real-Time Kinematic Applications

In some situations where short delay and low frequency multipath due to a moving platform itself and close-by reflectors is predominant, a parametric estimation approach based on functional models, which relate the multipath errors of the code and carrier tracking loops with multipath parameters, is useful in mitigating the effects of multipath in the code and carrier phase measurements. 214 We...