Scipediacontent: Scipediacontent moved page Draft Content 888466293 to Li et al 2020k

2021-02-12T14:12:13Z

Scipediacontent moved page Draft Content 888466293 to Li et al 2020k

Scipediacontent: Created page with " == Abstract == Global navigation satellite system (GNSS) is widely regarded as the primary positioning solution for intelligent transport system (ITS) applications. However,..."

2021-02-12T14:12:08Z

Created page with " == Abstract == Global navigation satellite system (GNSS) is widely regarded as the primary positioning solution for intelligent transport system (ITS) applications. However,..."

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== Abstract ==

Global navigation satellite system (GNSS) is widely regarded as the primary positioning solution for intelligent transport system (ITS) applications. However, its performance could degrade, due to signal outages and faulty-signal contamination, including multipath and non-line-of-sight reception. Considering the limitation of the performance and computation loads in mass-produced automotive products, this research investigates the methods for enhancing GNSS-based solutions without significantly increasing the cost for vehicular navigation system. In this study, the measurement technique of the odometer in modern vehicle designs is selected to integrate the GNSS information, without using an inertial navigation system. Three techniques are implemented to improve positioning accuracy; (a) Time-differenced carrier phase (TDCP) based filter: A state-augmented extended Kalman filter is designed to incorporate TDCP measurements for maximizing the effectiveness of phase-smoothing; (b) odometer-aided constraints: The aiding measurement from odometer utilizing forward speed with the lateral constraint enhances the state estimation; the information based on vehicular motion, comprising the zero-velocity constraint, fault detection and exclusion, and dead reckoning, maintains the stability of the positioning solution; (c) robust regression: A weighted-least-square based robust regression as a measurement-quality assessment is applied to adjust the weightings of the measurements adaptively. Experimental results in a GNSS-challenging environment indicate that, based on the single-point-positioning mode with an automotive-grade receiver, the combination of the proposed methods presented a root-mean-square error of 2.51 m, 3.63 m, 1.63 m, and 1.95 m for the horizontal, vertical, forward, and lateral directions, with improvements of 35.1%, 49.6%, 45.3%, and 21.1%, respectively. The statistical analysis exhibits 97.3% state estimation result in the horizontal direction for the percentage of epochs that had errors of less than 5 m, presenting that after the intervention of proposed methods, the positioning performance can fulfill the requirements for road level applications.

Document type: Article

== Full document ==
<pdf>Media:Draft_Content_888466293-beopen494-4478-document.pdf</pdf>

== Original document ==

The different versions of the original document can be found in:

* [https://www.mdpi.com/2072-4292/12/16/2550/pdf https://www.mdpi.com/2072-4292/12/16/2550/pdf] under the license https://creativecommons.org/licenses/by

* [https://dblp.uni-trier.de/db/journals/remotesensing/remotesensing12.html#ChiangLHC20 https://dblp.uni-trier.de/db/journals/remotesensing/remotesensing12.html#ChiangLHC20],
: [https://researchoutput.ncku.edu.tw/en/publications/the-design-a-tdcp-smoothed-gnssodometer-integration-scheme-with-v https://researchoutput.ncku.edu.tw/en/publications/the-design-a-tdcp-smoothed-gnssodometer-integration-scheme-with-v],
: [https://doi.org/10.3390/rs12162550 https://doi.org/10.3390/rs12162550],
: [https://academic.microsoft.com/#/detail/3048807157 https://academic.microsoft.com/#/detail/3048807157] under the license cc-by

* [https://www.mdpi.com/2072-4292/12/16/2550 https://www.mdpi.com/2072-4292/12/16/2550],
: [https://doaj.org/toc/2072-4292 https://doaj.org/toc/2072-4292]

* [https://www.mdpi.com/2072-4292/12/16/2550/pdf https://www.mdpi.com/2072-4292/12/16/2550/pdf],
: [http://dx.doi.org/10.3390/rs12162550 http://dx.doi.org/10.3390/rs12162550]

under the license https://creativecommons.org/licenses/by/4.0/

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Li et al 2020k - Revision history

Scipediacontent: Scipediacontent moved page Draft Content 888466293 to Li et al 2020k

Scipediacontent: Created page with " == Abstract == Global navigation satellite system (GNSS) is widely regarded as the primary positioning solution for intelligent transport system (ITS) applications. However,..."