A novel multipath mitigation scheme based on slope differential of correlator output for Galileo systems

In this paper, we propose a novel multipath mitigation scheme based on the slope difference of the correlator output between the received and locally generated reference signals. Since the proposed scheme employs only the prompt correlator, it does not require a high speed digital signal processing for the narrow early-late spacing, unlike the narrow correlator (NC) and strobe correlator (SC). Moreover, in the presence of the multipath, the proposed scheme has an unbiased tracking error, whereas the NC and SC schemes have a biased tracking error due to the non-symmetric property of the correlation output