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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Generating Method of an Unambiguous Correlation Function for AltBOC Signal Tracking

AltBOC의 코드 추적을 위한 비모호 상관함수 생성 기법

  • Woo, Sunghyuk (Sungkyunkwan University, College of Information & Communication Engineering) ;
  • Chae, Keunhong (Sungkyunkwan University, College of Information & Communication Engineering) ;
  • Lee, Seong Ro (Mokpo National University, Department of Information & Electronics Engineering) ;
  • Park, Soonyoung (Mokpo National University, Department of Information & Electronics Engineering) ;
  • Yoon, Seokho (Sungkyunkwan University, College of Information & Communication Engineering)
  • Received : 2015.04.02
  • Accepted : 2015.05.14
  • Published : 2015.05.31
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Abstract

The autocorrelation of an alternative binary offset carrier (AltBOC) signal provides an improved positioning accuracy because of its narrow main-peak. However, The AltBOC signal has a disadvantage that the autocorrelation of the AltBOC signal has multiple side-peaks which incur a severe positioning error. In this paper, we propose a generating method of an unambiguous correlation function for AltBOC signal tracking. Specifically, we first obtain symmetric partial correlation functions, and subsequently, we obtain an unambiguous correlation function by combining them. In numerical results, it is confirmed that the proposed correlation function provides better tracking error standard devation (TESD) performances comparing with the conventional correlation functions.

AltBOC 신호의 자기상관함수는 좁은 주 첨두로 인하여 향상된 측위 정확도를 제공한다. 하지만, AltBOC 신호의 자기상관함수에는 주변 첨두가 존재하기 때문에, 이로 인해 심각한 위치 추적 오류를 일으킬 수 있다는 단점이 존재한다. 본 논문에서는 AltBOC 신호 추적을 위한 비모호 상관함수 생성 기법을 제안한다. 구체적으로는, 우선 서로 대칭인 부분 상관함수를 얻은 후, 이들을 조합하여 주변 첨두가 제거된 비모호 상관함수를 생성한다. 모의실험을 통해 제안한 상관함수를 이용하여 신호 추적을 수행할 경우, 기존의 상관함수들에 비해 더욱 뛰어난 추적 오류 표준 편차 (tracking error standard deviation: TESD) 성능을 보임을 확인한다.

Keywords

References

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