Statistical Multipath Model Based on Experimental GNSS Data in Static Urban Canyon Environment

A deep understanding of multipath characteristics is essential to design signal simulators and receivers in global navigation satellite system applications. As a new constellation is deployed and more applications occur in the urban environment, the statistical multipath models of navigation signal...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2018-04, Vol.18 (4), p.1149
Main Authors: Wang, Yuze, Chen, Xin, Liu, Peilin
Format: Article
Language:English
Subjects:
Attenuation
Computer simulation
Delay
Fading
global navigation satellite system
multipath
Navigation satellites
Probability distribution
Probability distribution functions
Satellites
Signal processing
Simulators
Statistical analysis
statistical model
Street canyons
Time lag
urban canyon
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Summary:A deep understanding of multipath characteristics is essential to design signal simulators and receivers in global navigation satellite system applications. As a new constellation is deployed and more applications occur in the urban environment, the statistical multipath models of navigation signal need further study. In this paper, we present statistical distribution models of multipath time delay, multipath power attenuation, and multipath fading frequency based on the experimental data in the urban canyon environment. The raw data of multipath characteristics are obtained by processing real navigation signal to study the statistical distribution. By fitting the statistical data, it shows that the probability distribution of time delay follows a gamma distribution which is related to the waiting time of Poisson distributed events. The fading frequency follows an exponential distribution, and the mean of multipath power attenuation decreases linearly with an increasing time delay. In addition, the detailed statistical characteristics for different elevations and orbits satellites is studied, and the parameters of each distribution are quite different. The research results give useful guidance for navigation simulator and receiver designers.
ISSN:1424-8220
1424-8220
DOI:10.3390/s18041149