Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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A WLAN/GPS Hybrid Localization Algorithm for Indoor/Outdoor Transit Area

실내외 천이영역 적용을 위한 WLAN/GPS 복합 측위 알고리즘

  • 이영준 (한국항공대학교 항공전자및정보통신공학부) ;
  • 김희성 (한국항공대학교 항공전자및정보통신공학부) ;
  • 이형근 (한국항공대학교 항공전자및정보통신공학부)
  • Received : 2010.09.16
  • Accepted : 2011.04.25
  • Published : 2011.06.01
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Abstract

For improved localization around the indoor/outdoor transit area of buildings, this paper proposes an efficient algorithm combining the measurements from the WLAN (Wireless Local Area Network) and the GPS (Global Positioning System) for. The proposed hybrid localization algorithm considers both multipath errors and NLOS (Non-Line-of-Sight) errors, which occur in most wireless localization systems. To detect and isolate multipath errors occurring in GPS measurements, the propose algorithm utilizes conventional multipath test statistics. To convert WLAN signal strength measurements to range estimates in the presence of NLOS errors, a simple and effective calibration algorithm is designed to compute conversion parameters. By selecting and combining the reliable GPS and WLAN measurements, the proposed hybrid localization algorithm provides more accurate location estimates. An experiment result demonstrates the performance of the proposed algorithm.

Keywords

References

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