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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Gradient On-Off Beamforming Algorithm Based On Eigen-Space Method For a Smart Antenna In IS-2000 1X Signal Environment

IS-2000 1X 신호 환경하에서의 고유공간 방법에 근간한 그래디언트 온-오프 빔평성 알고리즘

  • 이정자 (한양대학교 전자통신전파공학과) ;
  • 이원철 (한양대학교 전자통신전파공학과) ;
  • 최승원 (한양대학교 전자전기컴퓨터공학부)
  • Published : 2003.10.01
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Abstract

This paper presents a gradient ON-OFF algorithm of which the performance is very robust even when the angle spread increases in the mobile communication environments. The proposed method getting the diversity gain by utilizing the primary and secondary eigenvector, which corresponds to the largest and the second largest eigenvalue of the autocovariance matrix of the received signal vector, outperforms the method which just utilizes one eigenvector. By applying the proposed method to IS-2000 1X signal environments, it is observed that the proposed method shows excellent performance compared to a typical beamforming method using just one eigenvector, which considerably degrades the receiving performance as the angle spread increases.

본 논문은 이동통신 환경하에서 각도퍼짐(Angle Spread)이 증가하여도 우수한 성능을 유지하는 그래디언트 온-오프 빔형성 알고리즘을 제안한다. 제안된 방법은 수신 벡터신호의 자기상관행렬의 최대 고유치에 대응하는 고유벡터를 이용하되 상대적으로 큰 고유치에 대응하는 2개 고유벡터를 이용하여 다이버시티 이득을 얻음으로써 하나의 고유벡터 하나만 이용하는 방법[1]보다 우수한 성능을 나타난다. 본 제안된 방법을 IS-2000 1X신호환경에서 모의실험 결과 각도퍼짐이 증가하여도 기존의 하나의 고유벡터 하나를 사용하는 알고리즘보다 성능이 우수함을 확인 하였다.

Keywords

References

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