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http://dx.doi.org/10.7319/kogsis.2016.24.3.011

Development of Intelligent GNSS Positioning Technique Based on Low Cost Module for an Alley Navigation  

Kim, Hye In (PPSoln Inc.)
Park, Kwan Dong (Department of Geoinformatic Engineering, Inha University)
Publication Information
Journal of Korean Society for Geospatial Information Science / v.24, no.3, 2016 , pp. 11-18 More about this Journal
Abstract
Since GNSS signals get blocked by buildings in urban canyons or narrow alleys, it is very difficult to secure a enough number of visible satellites for satellite navigation in those poor signal-reception environments. In those situations, one cannot get their coordinates or obtain accurate positions. In this study, a couple of strategies for improving positioning accuracy in urban canyons were developed and their performance was verified. First of all, we combined GPS and GLONASS measurements together and devised algorithms to quality-control observed signals and eliminate outliers. Also, a new multipath reduction scheme was applied to minimize its effect by utilizing SNR values of the observed signals. For performance verification of the developed technique, a narrow alley of 10m width located near the back gate of the Inha University was selected as the test-bed, and then we conducted static and kinematic positioning at four pre-surveyed points. We found that our new algorithms produced an 45% improvement in an open-sky environment compared with the positioning result of a low-cost u-blox receiver. In the alleys, 3-D accuracy improved by an average of 37%. In the case of kinematic positioning, especially, biases showing up in regular receivers got eliminated significantly through our new filtering algorithms.
Keywords
GNSS; Navigation; Urban Canyon; Narrow Alley; Multipath;
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Times Cited By KSCI : 4  (Citation Analysis)
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