BDS satellite-induced code multipath: Mitigation and assessment in new-generation IOV satellites

Abstract

This article is dedicated to the developments of the new-generation of BDS satellites and the mitigation of the satellite-induced code multipath error. Basic signal parameters of three new-generation BDS IOV satellites were introduced. A monitoring receiver connected to a wideband choke ring antenna GNSS-750 from NovAtel on the rooftop of a tall building. The used antenna has high quality and is multipath insensitive at the user's end. Code multipath errors of their triple-frequency civil signals were assessed based on data of several days in Xi’an. The means and standard deviations of MP series for IOV BDS civil signals across different elevation-intervals were calculated to assess the multipath error variations across different elevation-intervals. Thorough hypothesis-testing experiments were carried out to determine whether the code multipath errors significantly change with elevation using one-way analysis of variance. The code multipath errors of three BDS IOV satellites and three operational BDS satellites are compared under the same condition demonstrating the effective mitigation of satellite-induced code multipath errors for the new-generation BDS IOV satellites. Experimental results show that the satellite-induced code multipath bias is not obvious for the new-generation BDS IOV satellites under analysis.