A New GPS Multipath Mitigation Technique

As Global Positioning System(GPS)has found wide applications in more fields,the higher GPS position precision is required,even in the centimeter level or millimeter level.Though the differential GPS system can mitigate most errors to improve the position precision,it can not mitigate the error caused by multipath signals.The impact of multipath signals in GPS is introduced,and the advantages and disadvantages of two multipath mitigation techniques are analyzed,based on TK algorithm and Multipath Indicator(MPI)algorithm respectively.A new combining technique(TK-MPI algorithm)by cascading TK and MPI algorithm is proposed,and it achieves better precision of position,especially having a good performance in case of low signal-to-noise ratio.