Unambiguous s-curve shaping for multipath mitigation for MBOC modulated signals in GNSS

A novel multipath mitigation algorithm for multiplex binary offset carrier (MBOC) signals in the Global Navigation Satellite System (GNSS) is presented. Based on the W2 code correlation reference waveform (CCRW) structure, a series of bipolar reference waveform (BRW) are introduced to shape the unambiguous s-curve. The shaped s-curve has a single stable zero-crossing point, and the problem of unambiguous tracking in MBOC signals is solved. Multipath mitigation capability has also been improved. The proposed method matches the multipath mitigation performance of W2 CCRW. This method can be used in GPS L1 and Galileo E1.