Journal of Digital Convergence (디지털융복합연구)

The Society of Digital Policy and Management (한국디지털정책학회)
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A Study on a 3-Dimensional Positioning System over Indoor Wireless Environments

실내 무선 환경에서 3차원 위치 추적 시스템에 관한 연구

  • Kang, Byeong-Gwon (Dept. of Information and Communication Engineering, Soonchunhyang University) ;
  • Choi, Sung-Ja (Dept. of Multimedia Engineering, Hannam University) ;
  • Kim, Gui-Jung (Dept. Biomedical Engineering, Konyang University) ;
  • Park, Yong-Seo (Dept. of Electrical Engineering, Gachon University)
  • Received : 2014.09.21
  • Accepted : 2014.11.20
  • Published : 2014.11.28
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Abstract

In this paper, we propose a novel algorithm for three dimensional positioning system and implement a system over indoor wireless channel. A commercial modules are used for mobile and fixed nodes which are product of German company Nanotron Co. This module adopts chirp spread spreading scheme as modulation method to improve the ranging resolution and the module satisfies the IEEE standard 802.15.4a. The distance computation is based on received signal strength(RSS) levels and trilateration method. A testbed was set up to measure and compare the positioning estimation error of the proposed algorithm. The experiments results showed that the accuracy of location estimation was sufficiently good as much as 1m distance error in a wireless environment in an office building.

본 논문에서는 실내 무선 채널을 고려한 3차원 위치 추적 알고리즘을 제안하고 그 시스템을 구현하였다. 본 시스템에서는 IEEE 802.15.4a 표준이 적용된 나노트론사의 상용화 모듈을 이동과 고정 노드에 사용하였다. 이 모듈은 거리 측정의 해상도를 향상시키기 위하여 첩 주파수 확산 방식을 채용하였으며, 거리는 수신된 신호 세기(RSS) 크기와 삼변측량법을 바탕으로 계산되었다. 테스트베드는 제안된 알고리즘의 위치 추적 평가 오차를 측정하고 비교하도록 구현하였다. 제안된 방법의 실험 결과 위치 평가의 정확도는 사무실 건물 내의 무선 환경에서 1m 정도의 거리 오차 정확도를 확인할 수 있었다.

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References

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