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Radio Propagation Model and Spatial Correlation Method-based Efficient Database Construction for Positioning Fingerprints

위치추정 전자지문기법을 위한 전파전달 모델 및 공간상관기법 기반의 효율적인 데이터베이스 생성

  • Cho, Seong Yun (Department of Applied Robotics, Kyungil University) ;
  • Park, Joon Goo (School of Electronics Engineering, Kyungpook National University)
  • 조성윤 (경일대학교 로봇응용학과) ;
  • 박준구 (경북대학교 전자공학부)
  • Received : 2014.02.04
  • Accepted : 2014.04.25
  • Published : 2014.07.01

Abstract

This paper presents a fingerprint database construction method for WLAN RSSI (Received Signal Strength Indicator)-based indoor positioning. When RSSI is used for indoor positioning, the fingerprint method can achieve more accurate positioning than trilateration and centroid methods. However, a FD (Fingerprint Database) must be constructed before positioning. This step is a very laborious process. To reduce the drawbacks of the fingerprint method, a radio propagation model-based FD construction method is presented. In this method, an FD can be constructed by a simulator. Experimental results show that the constructed FD-based positioning has a 3.17m (CEP) error. In this paper, a spatial correlation method is presented to estimate the NLOS(Non-Line of Sight) error included in the FD constructed by a simulator. As a result, the NLOS error of the FD is reduced and the performance of the error compensated FD-based positioning is improved. The experimental results show that the enhanced FD-based positioning has a 2.58m (CEP) error that is a reasonable performance for indoor LBS (Location Based Service).

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