The use of the carrier to noise ratios (C/N₀) to alleviate the problematic GNSS phase multipath

Abstract

The Global Navigation Satellite System (GNSS) multipath caused by the large time delays of the reflected signal causes errors to the output of the GNSS receiver, the Position, Velocity and Time (PVT). These errors are mitigated by the technology and architecture of the GNSS receiver. Numerous research has been conducted to reveal the correlation between the Signals to Noise Ratio (SNR). Various multipath-mitigating techniques uses the concept of SNR measurements during the data processing in the GNSS receiver to ease the impact of the signal multipath if the signal is imitated. In this paper, we define and analyse the concept of the multipath mitigation techniques that are dependent to the SNR measurements. Hence, all signal components that are found in GNSS signal such as phase, code, time and SNR will be utilized to estimate impact of the GNSS phase multipath. The technique of the C/V0 is incorporating the density power ration to the SNR measurements and this is used to calculate reliability of the GNSS signal tracking.