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Ranging and multipath-enhanced device-free localisation with densely-meshed ultra-wideband devices

Gentner, Christian and Schmidhammer, Martin (2023) Ranging and multipath-enhanced device-free localisation with densely-meshed ultra-wideband devices. IET Microwaves, Antennas & Propagation, 17 (8), pp. 667-676. Institution of Engineering and Technology (IET). doi: 10.1049/mia2.12373. ISSN 1751-8725.

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Device-free localisation (DFL) is a prominent example of radio sensing and radio frequency (RF)-based passive localisation. RF-based passive localisation approaches determine the position of a non-cooperative user based on the user's impact on radio propagation. In this regard, DFL systems measure user-induced changes in the properties of the received RF signals. With multipath-enhanced device-free localisation (MDFL), a novel passive localisation approach which is taking the advantage of user-induced fading in the multipath signals, that is, reflected and scattered signals is introduced. In this work, the authors realise an MDFL system using low-cost ultra-wideband (UWB) devices. Specifically, the Qorvo (DecaWave) DW1000 module is used, for which how to access the channel impulse response is described in detail. Additionally, an overview of the required signal processing for MDFL is provided and a possible sequential Bayesian approach is introduced. Moreover, an efficient ranging scheme based on time-division multiple access (TDMA) and message broadcasting is outlined, which allows the deployment of a large number of interconnected UWB devices. Using an exemplary network of interconnected UWB devices, the localisation performance of both DFL and MDFL for an indoor scenario is evaluated. Thereby, MDFL is shown to clearly outperform DFL in terms of robustness and accuracy. Furthermore, a TDMA-based ranging scheme for active localisation is used, that is, for localising an UWB device carried by the user, allowing for a direct comparison between active and passive localisation. Achieving a sub-decimetre accuracy, the active localisation outperforms both DFL and MDFL, and thus, shows the possibility of using an active localisation device to initialize MDFL.

Item URL in elib:https://elib.dlr.de/197295/
Document Type:Article
Title:Ranging and multipath-enhanced device-free localisation with densely-meshed ultra-wideband devices
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Gentner, ChristianUNSPECIFIEDhttps://orcid.org/0000-0003-4298-8195UNSPECIFIED
Schmidhammer, MartinUNSPECIFIEDhttps://orcid.org/0000-0002-9345-142XUNSPECIFIED
Date:27 May 2023
Journal or Publication Title:IET Microwaves, Antennas & Propagation
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 667-676
Publisher:Institution of Engineering and Technology (IET)
Keywords:Bayes methods, global positioning system, Kalman filters, radio networks, ultra wideband technology, wireless sensor networks
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - KoKoVI - Koordinierter kooperativer Verkehr mit verteilter, lernender Intelligenz
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Schmidhammer, Martin
Deposited On:19 Sep 2023 15:02
Last Modified:21 Sep 2023 07:30

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