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OFDM Indoor Positioning Based on TDOAs: Performance Analysis and Experimental Results

Gentner, Christian and Sand, Stephan and Dammann, Armin (2012) OFDM Indoor Positioning Based on TDOAs: Performance Analysis and Experimental Results. In: 2011 International Conference on Localization and GNSS, ICL-GNSS 2011. ICL GNSS 2012, 25.-27. Juni 2012, Starnberg, Deutschland.

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Abstract

Global navigation satellite systems (GNSSs) can deliver very good position estimates under optimum conditions. However, in urban and indoor scenarios positioning with GNSS is often impossible. On the other hand, cellular wireless communication systems, e.g., the new, orthogonal frequency division multiplexing (OFDM) based third generation partnership project’s long-term evolution (3GPP-LTE), provide excellent coverage in urban and most indoor environments. Thus, this paper researches timing based positioning algorithms for OFDM using time difference of arrival (TDOA) measurements and the 3GPP-LTE signals. Therefore, it introduces synchronization, TDOA estimation, and signal–to–noise ratio (SNR) estimation algorithms. To solve the navigation equation for TDOA, this paper considers the static Gauss-Newton algorithm, positioning Kalman filter and particle filter. Further, this paper derives new Cram´er-Rao lower bounds (CRLBs) to analyze the obtained algorithms. First, new CRLBs are derived for TDOA estimation and pairwise synchronized or fully synchronized transmitters. Afterwards, static and novel dynamic recursive Bayesian CRLBs are derived for position estimation. The CRLBs are compared to real estimated TDOAs and positions. Improvements of the positioning algorithms are still possible compared to the CRLBs. Nevertheless, this paper demonstrates that indoor positioning with TDOAs from OFDM based on 3GPP-LTE is possible.

Item URL in elib:https://elib.dlr.de/75718/
Document Type:Conference or Workshop Item (Poster)
Title:OFDM Indoor Positioning Based on TDOAs: Performance Analysis and Experimental Results
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gentner, ChristianChristian.Gentner (at) dlr.deUNSPECIFIED
Sand, StephanStephan.Sand (at) DLR.deUNSPECIFIED
Dammann, ArminArmin.Dammann (at) dlr.deUNSPECIFIED
Date:2012
Journal or Publication Title:2011 International Conference on Localization and GNSS, ICL-GNSS 2011
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:LTE, 3GPP-LTE, OFDM, indoor-positioning, CRLB, bounds, TDOA
Event Title:ICL GNSS 2012
Event Location:Starnberg, Deutschland
Event Type:international Conference
Event Dates:25.-27. Juni 2012
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W KN - Kommunikation/Navigation
DLR - Research area:Space
DLR - Program:W KN - Kommunikation/Navigation
DLR - Research theme (Project):W - 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:19 Sep 2012 09:55
Last Modified:09 Feb 2018 08:50

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