An Open Loop Multipath Correction Method for GNSS Navigation Signal

Multipath signal can bring orientation error to GNSS receiver, so it is necessary to mitigate multipath for highprecision receiver. Aiming at the advantages and disadvantages of commonly used multipath suppression methods at present, a new method is proposed in this paper. The autocorrelation function of range code is remolded through multiple gate delay for finding the code loop tracking bias caused by multipath signal, and this bias is amended by parabola fit method. The amended bias is used to correct the range between satellite and receiver through open loop method. This multipath mitigation method can optimize the position accuracy with code loop tracking performance and antidynamic performance not changed. Numerical simulations have demonstrated the effectiveness of the approach proposed.