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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Estimation Technique of Direction of Arrival for Location Service in the next Generation Mobile Communication System

차세대 이동통신시스템에서 Location Service를 위한 신호도착방향 추정기법

  • 이성로 (목포대학교 정보공학부 정보전자공학전공) ;
  • 최명수 (목포대학교 정보공학부 정보전자공학전공) ;
  • 김철희 (목포대학교 정보공학부 정보전자공학전공) ;
  • 안동순 (목포대학교 정보공학부 컴퓨터공학전공) ;
  • 김종화 (목포대학교 정보공학부 컴퓨터공학전공)
  • Published : 2003.05.01
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Abstract

Location service is usually provided by the GPS method using satellites. In the next generation mobile communication systems which use smart antennas, location service can be accomplished using direction of arrival (DOA) estimation techniques. In this paper, we propose a DOA estimation technique for the location service of the next generation mobile communication systems and investigate the validity of the proposed technique through computer simulation. First, DOA estimation problems of distributed sources are considered using vortical and horizontal array processors which are orthogonal to each other. The DOA of the elevation angle is estimated by the vertical array processor and then that of the azimuth angle is estimated by the horizontal array processor. Finally, the procedures of the location service for specific signal sources using three smart antennas are exhibited by computer simulation to show that the proposed DOA estimation technique can be used for the location service in the next generation mobile communication systems.

Location Service는 주로 위성을 이용한 GPS 방법에 의해 이루어진다. 그러나 스마트안테나를 쓰는 차세대이동통신시스템에서는 신호도착방향(DOA: Direction Of Arrival) 추정기법을 써서 Location Service가 가능하다. 본 논문에서는 차세대이동통신시스템에서 Location Service를 위한 DOA 추정기법에 관해 연구하고 타당성을 컴퓨터 모의실험을 통해 알아본다. 먼저, 직교하는 수직$.$수평 배열처리기를 써서 퍼진신호원의 DOA 추정문제를 다룬다. 수직배열처리기에서 수직 방향의 DOA를 추정한 다음 수평배열처리기에서 순차적으로 수평방향의 DOA를 추정한다. 다음으로, 3개의 스마트안테나를 이용하여 특정 신호원의 Location Service를 수행하는 과정을 컴퓨터 모의실험으로 보임으로서 제안된 DOA 추정기법이 차세대 이동통신시스템에서 Location Service를 위해 쓰일 수 있다는 타당성을 고찰한다.

Keywords

References

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