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A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems

Passive tracking aims to track targets without assistant devices, that is, device-free targets. Passive tracking based on Radio Frequency (RF) Tomography in wireless sensor networks has recently been addressed as an emerging field. The passive tracking scheme using geometric theorems (GTs) is one of...

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Autores principales: Zhou, Biao, Sun, Chao, Ahn, Deockhyeon, Kim, Youngok
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5877299/
https://www.ncbi.nlm.nih.gov/pubmed/29562621
http://dx.doi.org/10.3390/s18030895
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author Zhou, Biao
Sun, Chao
Ahn, Deockhyeon
Kim, Youngok
author_facet Zhou, Biao
Sun, Chao
Ahn, Deockhyeon
Kim, Youngok
author_sort Zhou, Biao
collection PubMed
description Passive tracking aims to track targets without assistant devices, that is, device-free targets. Passive tracking based on Radio Frequency (RF) Tomography in wireless sensor networks has recently been addressed as an emerging field. The passive tracking scheme using geometric theorems (GTs) is one of the most popular RF Tomography schemes, because the GT-based method can effectively mitigate the demand for a high density of wireless nodes. In the GT-based tracking scheme, the tracking scenario is considered as a two-dimensional geometric topology and then geometric theorems are applied to estimate crossing points (CPs) of the device-free target on line-of-sight links (LOSLs), which reveal the target’s trajectory information in a discrete form. In this paper, we review existing GT-based tracking schemes, and then propose a novel passive tracking scheme by exploiting the Intercept Theorem (IT). To create an IT-based CP estimation scheme available in the noisy non-parallel LOSL situation, we develop the equal-ratio traverse (ERT) method. Finally, we analyze properties of three GT-based tracking algorithms and the performance of these schemes is evaluated experimentally under various trajectories, node densities, and noisy topologies. Analysis of experimental results shows that tracking schemes exploiting geometric theorems can achieve remarkable positioning accuracy even under rather a low density of wireless nodes. Moreover, the proposed IT scheme can provide generally finer tracking accuracy under even lower node density and noisier topologies, in comparison to other schemes.
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spelling pubmed-58772992018-04-09 A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems Zhou, Biao Sun, Chao Ahn, Deockhyeon Kim, Youngok Sensors (Basel) Article Passive tracking aims to track targets without assistant devices, that is, device-free targets. Passive tracking based on Radio Frequency (RF) Tomography in wireless sensor networks has recently been addressed as an emerging field. The passive tracking scheme using geometric theorems (GTs) is one of the most popular RF Tomography schemes, because the GT-based method can effectively mitigate the demand for a high density of wireless nodes. In the GT-based tracking scheme, the tracking scenario is considered as a two-dimensional geometric topology and then geometric theorems are applied to estimate crossing points (CPs) of the device-free target on line-of-sight links (LOSLs), which reveal the target’s trajectory information in a discrete form. In this paper, we review existing GT-based tracking schemes, and then propose a novel passive tracking scheme by exploiting the Intercept Theorem (IT). To create an IT-based CP estimation scheme available in the noisy non-parallel LOSL situation, we develop the equal-ratio traverse (ERT) method. Finally, we analyze properties of three GT-based tracking algorithms and the performance of these schemes is evaluated experimentally under various trajectories, node densities, and noisy topologies. Analysis of experimental results shows that tracking schemes exploiting geometric theorems can achieve remarkable positioning accuracy even under rather a low density of wireless nodes. Moreover, the proposed IT scheme can provide generally finer tracking accuracy under even lower node density and noisier topologies, in comparison to other schemes. MDPI 2018-03-17 /pmc/articles/PMC5877299/ /pubmed/29562621 http://dx.doi.org/10.3390/s18030895 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhou, Biao
Sun, Chao
Ahn, Deockhyeon
Kim, Youngok
A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems
title A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems
title_full A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems
title_fullStr A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems
title_full_unstemmed A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems
title_short A Novel Passive Tracking Scheme Exploiting Geometric and Intercept Theorems
title_sort novel passive tracking scheme exploiting geometric and intercept theorems
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5877299/
https://www.ncbi.nlm.nih.gov/pubmed/29562621
http://dx.doi.org/10.3390/s18030895
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