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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Time and Frequency Synchronization Algorithm for IEEE 802.16.1a Based Talk-Around Direct Communications

IEEE 802.16.1a 기반 단말간 직접통신을 위한 시간 및 주파수 동기화 알고리즘

  • 배지민 (한국항공대학교 항공전자및정보통신공학부 정보통신공학전공) ;
  • 김현수 (한국항공대학교 항공전자및정보통신공학부 정보통신공학전공) ;
  • 장성철 (한국전자통신연구원 무선접속기술연구팀) ;
  • 윤철식 (한국전자통신연구원 무선접속기술연구팀) ;
  • 최지훈 (한국항공대학교 항공전자및정보통신공학부 정보통신공학전공)
  • Received : 2012.10.23
  • Accepted : 2013.01.15
  • Published : 2013.02.28
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Abstract

In this paper, we propose a new estimation method of time offset, frequency offset, and signal to interference plus noise ratio (SINR) using the synchronization channel preamble to provide IEEE 802.16.1a based talk-around direct communications (TDC). The proposed scheme estimates the time offset and frequency offset both in the time domain and in the frequency domain considering the preamble structure. In addition, it improves the estimation accuracy by combining the estimated values in two domains taking into account TDC synchronization scenarios. Through numerical simulations in the TDC channel environments, the performance of the proposed algorithm is compared with those of existing techniques such as the time domain estimation and the frequency domain estimation.

이 논문에서는 IEEE 802.16.1a 기반 단말간 직접통신을 위해 동기채널 프리앰블을 이용한 시간 및 주파수 오차, 신호대 간섭및잡음 비 추정 기법을 제안한다. 제안된 기법은 프리앰블의 구조를 고려하여 시간영역 및 주파수영역에서 시간 및 주파수 오차를 추정한다. 그리고 단말의 동작 환경을 고려하여 두가지 영역에서 추정된 값을 결합하여 추정 성능을 높인다. 직접통신 채널 환경에서의 모의실험을 통해 제안된 기법의 성능과 시간영역 혹은 주파수 영역에서 추정하는 기존 기법의 성능을 비교한다.

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