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WiFi-RTT Indoor Positioning

Gentner, Christian and Kuehner, Isabell and Ulmschneider, Markus and Dammann, Armin (2021) WiFi-RTT Indoor Positioning. IEEE/ION PLANS 2020, Portland, Oregon, USA.

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Abstract

Global navigation satellite systems (GNSSs) can deliver very good position estimates under optimum conditions. However, especially in urban and indoor scenarios with severe multipath propagation and blocking of satellites by buildings the accuracy loss can be very large. Using WiFi for indoor positioning is a common approach because WiFi infrastructure is widely deployed. Recently the WiFi IEEE 802.11-2016 standard was released, which includes a fine timing measurement (FTM) protocol, more commonly known as WiFi-round-trip-time (WiFiRTT) protocol, for WiFi ranging. Thus, this paper researches timing based positioning algorithms, in this case using WiFiRTT distance estimates. Based on two measurement campaigns, in an antenna measurement chamber and in a typical indoor environment, a WiFi-RTT distance error model is derived. Both measurement campaigns show, that the distance is underestimated, hence, the estimated distance is lower than the true distance. The WiFi-RTT distance error model is afterwards included in the likelihood function of a particle filter (PF) and the positioning performances is evaluated in an indoor scenario. These evaluations show clearly the possibility of using WiFi-RTT distance estimates for indoor positioning.

Item URL in elib:https://elib.dlr.de/134078/
Document Type:Conference or Workshop Item (Speech)
Title:WiFi-RTT Indoor Positioning
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gentner, Christianchristian.gentner (at) dlr.dehttps://orcid.org/0000-0003-4298-8195
Kuehner, Isabellisabel.kuehner (at) dlr.deUNSPECIFIED
Ulmschneider, Markusmarkus.ulmschneider (at) dlr.dehttps://orcid.org/0000-0001-7241-7057
Dammann, ArminArmin.Dammann (at) dlr.dehttps://orcid.org/0000-0002-7112-1833
Date:14 June 2021
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Wifi-RTT, Indoor positioning, positioning, GNSS, particle filter, WiFi, WLAN, RTT, FTM, IEEE 802.11-2016
Event Title:IEEE/ION PLANS 2020
Event Location:Portland, Oregon, USA
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben GNSS2/Neue Dienste und Produkte (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Gentner, Christian
Deposited On:14 Jun 2021 13:32
Last Modified:14 Jun 2021 13:32

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