Effects of Multi-path on GNSS Navigation: A study on Pseudo-range estimates when a GNSS antenna is mounted on a vehicular platform
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School of Electrical Engineering |
Master's thesis
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Authors
Date
2024-08-30
Department
Major/Subject
Communications Engineering
Mcode
Degree programme
Master's Programme in Computer, Communication and Information Sciences
Language
en
Pages
64
Series
Abstract
This thesis investigates the impact of multi-path effects on GNSS navigation, specifically focusing on pseudo-range estimates when a GNSS antenna is mounted on a vehicular platform. It addresses the challenges posed by the vehicular structure’s influence on signal propagation, leading to errors in positioning accuracy critical for autonomous driving applications. A combination of theoretical analysis, simulations, and empirical measurements was employed to characterize these errors. Results indicate that the position and structure of vehicle, specifically the groundplane, of the GNSS antenna on the vehicle significantly influence the magnitude and pattern of multi-path errors, which can be effectively predicted through high-frequency structure simulation software and mitigated through careful calibration. Furthermore, it highlights the shortcomings and suggests how to improve to get better results.Description
Supervisor
Jäntti, RikuThesis advisor
Hide, ChrisKeywords
pseudo-ranges, group delay variations, right-hand circular polarization, patch antenna, GNSS L1 Band, GNSS L2 Band