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A New Anti-Multipath Technique Based on Modified Rake Model for GNSS Receiver

Jingbo Zhang

Open publisher page 2 citations

Abstract

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.

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What this paper is about

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.

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Available abstract

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.

Key concepts: Rake receiver, GNSS applications, Multipath propagation, Multipath mitigation, Computer science, Global Positioning System, Delay spread, SIGNAL (programming language)

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A New Anti-Multipath Technique Based on Modified Rake Model for GNSS Receiver — Research Paper | ScholarLens