Improved TOA‐Based Localization Method with BS Selection Scheme for Wireless Sensor Networks

The purpose of a localization system is to estimate the coordinates of the geographic location of a mobile device. The accuracy of wireless localization is influenced by non‐line‐of‐sight (NLOS) errors in wireless sensor networks. In this paper, we present an improved time of arrival (TOA)–based loc...

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Published inETRI journal Vol. 37; no. 4; pp. 707 - 716
Main Authors Go, Seungryeol, Chong, Jong‐Wha
Format Journal Article
LanguageEnglish
Published Electronics and Telecommunications Research Institute (ETRI) 01.08.2015
한국전자통신연구원
Subjects
BS selection
Location estimation
NLOS
non‐line‐of‐sight
time of arrival
TOA
wireless localization
wireless sensor networks
전자/정보통신공학
Online AccessGet full text
ISSN1225-6463
2233-7326
2233-7326
DOI10.4218/etrij.15.0114.1251

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Abstract The purpose of a localization system is to estimate the coordinates of the geographic location of a mobile device. The accuracy of wireless localization is influenced by non‐line‐of‐sight (NLOS) errors in wireless sensor networks. In this paper, we present an improved time of arrival (TOA)–based localization method for wireless sensor networks. TOA‐based localization estimates the geographic location of a mobile device using the distances between a mobile station (MS) and three or more base stations (BSs). However, each of the NLOS errors along a distance measured from an MS (device) to a BS (device) is different because of dissimilar obstacles in the direct signal path between the two devices. To accurately estimate the geographic location of a mobile device in TOA‐based localization, we propose an optimized localization method with a BS selection scheme that selects three measured distances that contain a relatively small number of NLOS errors, in this paper. Performance evaluations are presented, and the experimental results are validated through comparisons of various localization methods with the proposed method.
AbstractList The purpose of a localization system is to estimate the coordinates of the geographic location of a mobile device. The accuracy of wireless localization is influenced by non‐line‐of‐sight (NLOS) errors in wireless sensor networks. In this paper, we present an improved time of arrival (TOA)–based localization method for wireless sensor networks. TOA‐based localization estimates the geographic location of a mobile device using the distances between a mobile station (MS) and three or more base stations (BSs). However, each of the NLOS errors along a distance measured from an MS (device) to a BS (device) is different because of dissimilar obstacles in the direct signal path between the two devices. To accurately estimate the geographic location of a mobile device in TOA‐based localization, we propose an optimized localization method with a BS selection scheme that selects three measured distances that contain a relatively small number of NLOS errors, in this paper. Performance evaluations are presented, and the experimental results are validated through comparisons of various localization methods with the proposed method.
The purpose of a localization system is to estimate the coordinates of the geographic location of a mobile device. The accuracy of wireless localization is influenced by non-line-of-sight (NLOS) errors in wireless sensor networks. In this paper, we present an improved time of arrival (TOA)–based localization method for wireless sensor networks. TOA-based localization estimates the geographic location of a mobile device using the distances between a mobile station (MS) and three or more base stations (BSs). However, each of the NLOS errors along a distance measured from an MS (device) to a BS (device) is different because of dissimilar obstacles in the direct signal path between the two devices. To accurately estimate the geographic location of a mobile device in TOA-based localization, we propose an optimized localization method with a BS selection scheme that selects three measured distances that contain a relatively small number of NLOS errors, in this paper. Performance evaluations are presented, and the experimental results are validated through comparisons of various localization methods with the proposed method. KCI Citation Count: 18
Author Go, Seungryeol
Chong, Jong‐Wha
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Notes and Jong‐Wha Chong (corresponding Author
milkyface@hanyang.ac.kr
are with the Department of Electronics and Computer Engineering, Hanyang University, Seoul, Rep. of Korea.
This work was supported by the National Research Foundation of Rep. of Korea (NRF) grant funded by the Korean government (MOE) (NRF‐2013R1A1A2011259).
Seungryeol Go
jchong@hanyang.ac.kr
G704-001110.2015.37.4.014
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Snippet The purpose of a localization system is to estimate the coordinates of the geographic location of a mobile device. The accuracy of wireless localization is...
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SubjectTerms BS selection
Location estimation
NLOS
non‐line‐of‐sight
time of arrival
TOA
wireless localization
wireless sensor networks
전자/정보통신공학
Title Improved TOA‐Based Localization Method with BS Selection Scheme for Wireless Sensor Networks
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