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Walsh code를 이용한 Manchester code 기반 가시광 통신 실내 위치인식에 대한 연구

A study on indoor visible light communication localization based on manchester code using walsh code

  • Kim, Won-yeol (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University) ;
  • Park, Sang-gug (Division of Steel-IT Engineering, Uiduk University) ;
  • Cho, Woong-ho (Digital Electronics and Information, Daegu Technical University) ;
  • Noh, Duck-soo (Department of Electronics Engineering, Kyungil University) ;
  • Seo, Dong-hoan (Division of Electronics and Electrical Information Engineering, Korea Maritime and Ocean University)
  • 투고 : 2015.11.12
  • 심사 : 2015.11.25
  • 발행 : 2015.11.30

초록

본 논문에서는 Walsh code를 이용하여 중첩된 Light emitting diode(LED) 송신신호들을 수신부에서 각각의 LED 송신신호로 식별하고 조명의 깜박임 현상을 제거할 수 있는 Manchester code 기반 가시광 통신 실내 위치인식 시스템을 제안한다. 제안한 시스템은 고정된 LED 광원의 위치정보들과 수신부에서 그들로부터 수신된 신호들을 람버시안 방사 특성과 삼변 측량법을 이용하여 수신부의 상대적인 위치를 추정할 수 있다. 제안한 논문의 타당성을 검증하기 위하여 16개의 LED 조명을 설치한 $6{\times}6{\times}1.5m^3$의 실내 공간에서 모의실험을 수행하였다. 그 결과, 중첩된 송신신호들은 수신부에서 분리가 가능하고 측위 오차는 최대 0.2977 m, 평균 오차 0.0536 m로 정밀한 위치 인식이 가능하였다.

In this paper, we propose an indoor visible light communication(VLC) localization using Walsh code which can identify overlapped signals transmitted from the different LED sources as each of orthogonal signal at a receiver and using Manchester code which can eliminate the flicker of LED light and maintain a constant brightness. The proposed system can estimate the relative position of the receiver by using Lambertian radiation properties and trilateration method that are applied to the location information of fixed LED sources and the received signals from them. In order to verify the feasibility of the proposed system, we carried out the simulation in an indoor space with $6{\times}6{\times}1.5m^3$ installed LED lamps of 16. The simulation result shows that the proposed method achieves an average positioning error of 0.0536 m and a maximum positioning error of 0.2977 m.

키워드

참고문헌

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