SUN Xiao-wen, ZHANG Shu-fang, HU Qing, et al. A New Anti-Multipath Technique Based on Modified Rake Model for GNSS Receiver[J]. Acta Electronica Sinica, 2011, 39(10): 2422-2426.
SUN Xiao-wen, ZHANG Shu-fang, HU Qing, et al. A New Anti-Multipath Technique Based on Modified Rake Model for GNSS Receiver[J]. Acta Electronica Sinica, 2011, 39(10): 2422-2426.DOI:
Traditional GNSS (Global Navigation Satellite System) receiver tracks only one signal
which is the composite of direct path and multipath components.Multipath error can be generated if the signal is used for navigation processing.This paper presents a new anti-multipath technique for GNSS receiver.It is based on MRake (Modified Rake) model that separate the direct path and multipath components
and keep tracking with them.In the Finger that track direct path component
multipath components tracked by other Fingers are subtracted from the composite signal
so multipath error can be reduced.MRake model's principle is introduced
and then its function is verified by simulation.It is implemented in an FPGA based GPS receiver
and test results show that receiver using the new technique can improve its positioning accuracy in presence of multipath propagation.