Analysis of the Multipath Meter Performance in Environments With Multiple Interferers

Bryan Townsend, Jonathan Wiebe, Andy Jakab, Michael Clayton and Tony Murfin

Abstract:	The Multipath Estimating Delay-Lock-Loop (MEDLL) is a method for mitigating the effects due to multipath within the receiver tracking loops. A previous publication [8] showed how the MEDLL receiver was modified into an instrument for measuring multipath. This instrument is called the Multipath Meter. It outputs the delay, relative amplitude, and phase of the multipath signal along with the residual values for each correlator. The results showed how the Multipath Meter is used for reference station site analysis and real-time signal quality monitoring (SQM). This paper builds on the previous paper by investigating how the Multipath Meter performs in more severe multipath environments. The most significant of these is the situation where there are multiple multipath signals present. It is known that the performance of the MEDLL is degraded in this situation. Our investigation includes analyzing and quantifying the effect on the MEDLL performance as well as analyzing the ability of the Multipath Meter to detect this situation when it occurs. A new software tool designed and produced by NovAtel is introduced. The software is called the Multipath Assessment Tool (MAT). MAT graphically displays the Multipath Meter output as well as performing some statistical analysis. It is used for real-time SQM and post- mission analysis.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	480 - 488
Cite this article:	Townsend, Bryan, Wiebe, Jonathan, Jakab, Andy, Clayton, Michael, Murfin, Tony, "Analysis of the Multipath Meter Performance in Environments With Multiple Interferers," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 480-488.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In