The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Cell Searching and DoA Estimation Techniques for Mobile Relay Stations with a Uniform Linear Array

선형 등간격 어레이를 갖는 이동 릴레이를 위한 셀 탐색 및 입사각 추정 기법

  • Ko, Yo-Han (School of Electrical & Electronic Engineering, Chung-Ang University) ;
  • Park, Chang-Hwan (School of Electrical & Electronic Engineering, Chung-Ang University) ;
  • Lee, Seung-Jae (School of Electrical & Electronic Engineering, Chung-Ang University) ;
  • Cho, Yong-Soo (School of Electrical & Electronic Engineering, Chung-Ang University)
  • 고요한 (중앙대학교 전자전기공학부) ;
  • 박창환 (중앙대학교 전자전기공학부) ;
  • 이승재 (중앙대학교 전자전기공학부) ;
  • 조용수 (중앙대학교 전자전기공학부)
  • Received : 2010.04.06
  • Accepted : 2010.04.27
  • Published : 2010.06.30
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Abstract

In this paper, estimation methods of cell searching and DoA (Direction of Arrival) for mobile relay stations with a uniform linear array are proposed. The proposed methods can improve the performance of cell searching and DoA estimation by removing the effect of STOs when there exist symbol timing offsets (STOs) between the signals received from adjacent base stations,. Also, the proposed methods can improve the performance of DoA estimation significantly when there exists Doppler frequency shift caused by movement of the mobile relay station. The performances and computational complexities of the proposed cell searching and DoA methods are evaluated by computer simulation under Mobile WiMAX environments.

본 논문에서는 선형 등간격 어레이를 갖는 이동 릴레이를 위한 셀 탐색 및 입사각 추정 기법을 제안한다. 제안된 기법은 이동 릴레이에 수신되는 각 기지국 신호간에 심볼 타이밍 옵셋이 존재하는 경우에 심볼 타이밍 옵셋의 영향을 제거하여 셀 탐색 및 입사각 추정 성능을 향상시킨다. 또한 제안된 기법은 이동 릴레이가 이동함에 따라 발생하는 도플러 주파수 천이가 존재하는 경우에 입사각 추정 성능을 크게 향상시킬 수 있다. Mobile WiMAX 환경 하에서 제안된 기법의 셀 탐색 및 입사각 추정 성능과 복잡도를 모의실험을 통해 검증한다.

Keywords

References

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