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Multipath Assisted Positioning using a Single Antenna with Angle of Arrival Estimations

Gentner, Christian and Pöhlmann, Robert and Jost, Thomas and Dammann, Armin (2014) Multipath Assisted Positioning using a Single Antenna with Angle of Arrival Estimations. In: Proceedings of the 27th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2014). ION GNSS+ 2014, Tampa, Florida, USA.

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Abstract

This paper presents and extends the idea of multipath assisted positioning, named Channel-SLAM. Generally, multipath reception degrades the accuracy of the positioning device as long as the receiver is based on standard methods. Strategies to mitigate multipath effects on range estimates are in general based on the estimation of the channel impulse response (CIR). All these methods have in common that they determine the CIR in order to remove the influence on the estimate of the line-of-sight (LoS) path delay. In contrast, Channel-SLAM uses the multipath propagation of the wireless signal to allow positioning in cases of insufficient number of transmitters or increase the accuracy otherwise. Channel-SLAM treats multipath components (MPCs) as signals from virtual transmitters (VTs) which are time synchronized to the physical transmitter and fixed in their position. To use the information of the MPCs, Channel-SLAM estimates the user position and the position of the VTs simultaneously and does not require any prior information such as room-layout or a database for fingerprinting. For Channel-SLAM it is essential to get angle of arrival (AoA) information for each MPC in order to estimate the VT position. However, obtaining AoA information in mobile receivers like smartphones is difficult in most of the cases. Hence, this paper estimates the AoA during the receiver movement using only a single receive antenna by a phase difference calculation, i.e. the Doppler-Shift, of the complex amplitude of a MPC at consecutive time steps. To improve further the accuracy of Channel-SLAM, additionally an inertial measurement unit (IMU) is fused to obtain heading information of the moving receiver. The derived algorithm is evaluated based on measurements where only one physical transmitter was used.

Item URL in elib:https://elib.dlr.de/89911/
Document Type:Conference or Workshop Item (Speech)
Title:Multipath Assisted Positioning using a Single Antenna with Angle of Arrival Estimations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gentner, ChristianChristian.Gentner (at) dlr.deUNSPECIFIED
Pöhlmann, Robertrobert.poehlmann (at) dlr.deUNSPECIFIED
Jost, Thomasthomas.jost (at) dlr.deUNSPECIFIED
Dammann, ArminArmin.Dammann (at) DLR.deUNSPECIFIED
Date:September 2014
Journal or Publication Title:Proceedings of the 27th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2014)
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Status:Published
Keywords:Channel-SLAM, Multipath assisted possitioning, positioning, multipath, indoor, doppler, antenna
Event Title:ION GNSS+ 2014
Event Location:Tampa, Florida, 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
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Gentner, Christian
Deposited On:26 Nov 2014 10:33
Last Modified:09 Feb 2018 09:02

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