Satellite navigation is vulnerable to many influence factors, such as ionosphere, troposphere, space-borne atomic clock and multipath, which would degrade its performance and accuracy. Some influence aspects, such as ionosphere delay and troposphere delay, could already be mitigated by analyzing, modeling and forecasting, however, multipath becomes the last significant influence factor to GNSS applications, especially in high precision positioning and navigation fields. An integrated multipath mitigation scheme is proposed based on Strobe Correlator and Advanced Maximum Slope Change, where Strobe Correlator is utilized to determine the rough ACF peak position of Line-of-Sight signal, the Advanced Maximum Slope Change method can decide its precise position. Simulation results show that the proposed scheme would be an effective multipath mitigation scheme, which is superior to conventional multipath mitigation methods, like Narrow Correlator and Strobe Correlator.

Keywords: strobe correlator, maximum slope change, GNSS, multipath mitigation