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http://dx.doi.org/10.12673/jant.2018.22.6.557

A Novel Short Delay Multipath Mitigation Algorithm for a GNSS based Land Vehicle in Urban Environment  

Lim, Deok Won (Navigation R&D Division, Technology R&D Head Office, Korea Aerospace Research Institute)
Chun, Sebum (Navigation R&D Division, Technology R&D Head Office, Korea Aerospace Research Institute)
Heo, Moon Beom (Navigation R&D Division, Technology R&D Head Office, Korea Aerospace Research Institute)
Publication Information
Journal of Advanced Navigation Technology / v.22, no.6, 2018 , pp. 557-565 More about this Journal
Abstract
For GNSS navigation in urban environment, a novel short delay multipath mitigation algorithm is proposed in this paper. This algorithm detects which satellite's signal is the multipath signal by using the constraint that GNSS receiver is equipped in a ground vehicle, then estimate new position after separating the measurement of that satellite. A criterion for detecting and validating the multipath signal depends on the performance grade of the GNSS receiver and the dynamics of the vehicle. In order to evaluate the proposed algorithm, the real data had been collected at the multipath environment of 4 scenarios. By post-processing the real data with both of the multipath mitigation algorithm in the receiver and the proposed algorithm, it can be checked that the position errors were less than 5 meters except the case that the number of visible satellite is lower than 5.
Keywords
GNSS; Multipath; Navigation; Short delay; Urban environment;
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