ETRI Journal

  • 제37권4호
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  • Pages.707-716
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  • 2015
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Improved TOA-Based Localization Method with BS Selection Scheme for Wireless Sensor Networks

  • Go, Seungryeol (Department of Electronics and Computer Engineering, Hanyang University) ;
  • Chong, Jong-Wha (Department of Electronics and Computer Engineering, Hanyang University)
  • 투고 : 2014.10.27
  • 심사 : 2015.03.19
  • 발행 : 2015.08.01
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초록

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 nonline-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.

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과제정보

연구 과제 주관 기관 : National Research Foundation of Rep. of Korea (NRF)

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