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

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Error Analysis of Time-Based and Angle-Based Location Methods

시간기반과 각도기반의 측위방식 성능비교 및 오차 특성 분석

  • 김동혁 (충남대학교 정보통신공학과) ;
  • 송승헌 (충남대학교 정보통신공학과) ;
  • 성태경 (충남대학교 전기정보통신공학부)
  • Published : 2006.10.01
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Abstract

Indoor positioning is highlighted recently, and various kinds of indoor positioning systems are under developments. Since positioning systems have their own characteristics, proper positioning scheme should be chosen according to the required specifications. Positioning methods are classified into time-based and angle-based one. This paper presents the error analysis of time-based and angle-based location methods. Because measurements of these methods are nonlinear, linearizations are needed in both cases to estimate the user position. In the linearization, Gauss-Newton method is used in both cases. To analyze the position error, we investigate the error ellipse parameters that include eccentricity, rotation angle, and the size of ellipse. Simulation results show that the major axes of TOA and AOA method lie in different quadrants at most region of workspace, especially where the geometry is poor. When the TOA/AOA hybrid is employed, it is found that the error ellipse is reduced to the intersection of ellipses of TOA and AOA.

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Cited by

  1. DOA and TOA Based Localization Services Protocol in IEEE 802.11 Networks vol.54, pp.1, 2010, https://doi.org/10.1007/s11277-009-9719-y