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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Timing Offset Estimation Scheme Based on Cross-Correlation Accumulation for Initial Ranging of IEEE 802.16e Systems

IEEE 802.16e 초기 레인징을 위한 상호 상관 누적 기반 타이밍 옵셋 추정 기법

  • 이재우 (성균관대학교 정보통신대학) ;
  • 윤석호 (성균관대학교 정보통신대학)
  • Received : 2012.10.09
  • Accepted : 2012.12.20
  • Published : 2012.12.28
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Abstract

In this paper, we propose a timing offset estimation scheme for initial ranging of IEEE 802.16e systems. The conventional scheme estimates the timing offset by using the cross-correlation between the local and received signals only. On the other hand, this paper proposes a timing offset estimation scheme with additional cross-correlations accumulated on the conventional cross-correlation. The additional cross-correlations are obtained by using the ranging signal with a repetitive structure. Numerical results show that the proposed scheme provides the better timing offset estimation performance compared with that of the conventional scheme.

본 논문에서는 IEEE 802.16e 초기 레인징을 위한 타이밍 옵셋 추정 기법을 제안한다. 기존의 연구에서는 수신 신호와 국부 (local) 신호의 상호 상관값만을 이용하여 타이밍 옵셋을 추정하였으나, 본 논문에서는 레인징 신호가 반복하여 전송된다는 특성을 이용하여 추가적인 상호 상관을 구하여 누적함으로써 상호 상관 함수의 main peak과 side peak의 전력 차이를 증가시킨다. 또한 모의실험을 통해 제안한 기법이 기존의 기법에 비해 우수한 타이밍 옵셋 추정 성능을 보임을 확인하였다.

Keywords

Acknowledgement

Supported by : 한국연구재단, 정보통신산업진흥원

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