Ubiquitous and Seamless Localization: Fusing GNSS Pseudoranges and WLAN Signal Strengths
Joint Authors
Richter, Philipp
Toledano-Ayala, Manuel
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-06-28
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Telecommunications Engineering
Abstract EN
Ubiquitous global positioning is not feasible by GNSS alone, as it lacks accurate position fixes in dense urban centres and indoors.
Hybrid positioning methods have been developed to aid GNSS in those environments.
Fingerprinting localization in wireless local area networks (WLANs) is a promising aiding system because of its availability, accuracy, and error mechanisms opposed to that of GNSS.
This article presents a low-cost approach to ubiquitous, seamless positioning based on a particle filter integrating GNSS pseudoranges and WLAN received signal strength indicators (RSSIs).
To achieve accurate location estimates indoors/outdoors and in the transition zones, appropriate likelihood functions are essential as they determine the influence of each sensor information on the position estimate.
We model the spatial RSSI distributions with Gaussian processes and use these models to predict RSSIs at the particle’s positions to obtain point estimates of the RSSI likelihood function.
The particle filter’s performance is assessed with real data of two test trajectories in an environment challenging for GNSS and WLAN fingerprinting localization.
Outcomes of an extended Kalman filter using pseudoranges and a WLAN position as observation is included as benchmark.
The proposed algorithm achieves accurate and robust seamless localization with a median accuracy of five meters.
American Psychological Association (APA)
Richter, Philipp& Toledano-Ayala, Manuel. 2017. Ubiquitous and Seamless Localization: Fusing GNSS Pseudoranges and WLAN Signal Strengths. Mobile Information Systems،Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1189218
Modern Language Association (MLA)
Richter, Philipp& Toledano-Ayala, Manuel. Ubiquitous and Seamless Localization: Fusing GNSS Pseudoranges and WLAN Signal Strengths. Mobile Information Systems No. 2017 (2017), pp.1-16.
https://search.emarefa.net/detail/BIM-1189218
American Medical Association (AMA)
Richter, Philipp& Toledano-Ayala, Manuel. Ubiquitous and Seamless Localization: Fusing GNSS Pseudoranges and WLAN Signal Strengths. Mobile Information Systems. 2017. Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1189218
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1189218