Optimal Combination of Multi-Agent Smartphone GNSS Observations for Improved Collaborative Positioning in Urban Areas

authored by: Lucy Icking, Steffen Schön
Abstract: Positioning in urban areas, especially with smartphones, is still a challenging task as buildings in the vicinity of the receiver can obstruct the direct line-of-sight to the satellites. In recent years, collaborative positioning has become a way to effectively mitigate common errors. However, as the extra path delays in urban areas are very unique for each user, it is crucial to find partners that have similar extra path delays so that in a double-difference approach, the errors will be reduced. In this paper, two methods are compared to see how the choice of partners will affect the positioning solution. We show that when choosing a partner with a high spatial correlation of extra path delays and performing classical double difference relative positioning, the solution is similar to a method in which for each observation, a suitable observation from another agent is found. On the contrary, if the spatial correlation of extra path delays is low, obtaining the position through the double difference method causes systematic errors which can be slightly reduced if combining the observations separately.
Organisation(s): Institute of Geodesy
Type: Conference contribution
Pages: 2828-2838
No. of pages: 11
Publication date: 2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Information Systems, Software, Electrical and Electronic Engineering, Communication, Computer Networks and Communications, Computer Science Applications
Electronic version(s): https://doi.org/10.33012/2022.18554 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{02921e346478441e9093210230db6335,
title = "Optimal Combination of Multi-Agent Smartphone GNSS Observations for Improved Collaborative Positioning in Urban Areas",
abstract = "Positioning in urban areas, especially with smartphones, is still a challenging task as buildings in the vicinity of the receiver can obstruct the direct line-of-sight to the satellites. In recent years, collaborative positioning has become a way to effectively mitigate common errors. However, as the extra path delays in urban areas are very unique for each user, it is crucial to find partners that have similar extra path delays so that in a double-difference approach, the errors will be reduced. In this paper, two methods are compared to see how the choice of partners will affect the positioning solution. We show that when choosing a partner with a high spatial correlation of extra path delays and performing classical double difference relative positioning, the solution is similar to a method in which for each observation, a suitable observation from another agent is found. On the contrary, if the spatial correlation of extra path delays is low, obtaining the position through the double difference method causes systematic errors which can be slightly reduced if combining the observations separately.",
author = "Lucy Icking and Steffen Sch{\"o}n",
note = "Funding Information: This work is supported by the German Research Foundation (DFG) as Collaboration in Dynamic Sensor Networks (i.c.sens) [RTG 2159]. ; 35th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS+ 2022 ; Conference date: 19-09-2022 Through 23-09-2022",
year = "2022",
doi = "10.33012/2022.18554",
language = "English",
pages = "2828--2838",
booktitle = "35th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS+ 2022",
publisher = "Institute of Navigation",
}