Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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Estimation of Time Difference Using Cross-Correlation in Underwater Environment

수중 환경에서 상호상관을 이용한 시간차이 추정

  • Lee, Young-Pil (Redone Technology) ;
  • Moon, Yong Seon (Department of Electronic Engineering, Sunchon University) ;
  • Ko, Nak Yong (Department of Control, Instrument and Robot Engineering, Chosun University) ;
  • Choi, Hyun-Taek (Korea Research Institute of Ships and Ocean Engineering(KRISO), KIOST) ;
  • Lee, Jeong-Gu (Korea Institute of Science and Technology Information) ;
  • Bae, Young-Chul (Division of Electrical.Electronic Communication and Computer Engineering, Chonnam National University)
  • 이영필 (레드원테크놀러지) ;
  • 문용선 (순천대학교 전자공학과) ;
  • 고낙용 (조선대학교 제어계측로봇공학과) ;
  • 최현택 (한국해양과학기술원부설선박해양플랜트연구소) ;
  • 이정구 (한국과학기술정보연구원) ;
  • 배영철 (전남대학교 전기.전자통신.컴퓨터공학부)
  • Received : 2016.02.26
  • Accepted : 2016.04.22
  • Published : 2016.04.30
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Abstract

Recently, underwater acoustic communication (UWAC) has been studied by many scholars and researchers. In order to use UWAC, we need to estimate time difference between the two signals in underwater environment. Typically, there are major three methods to estimate the time-difference between the two signals such as estimating the arrival time of the first non-background segment and calculate the temporal difference, calculating the cross-correlation between the two signal to infer the time-lagged, and estimating the phase delay to infer the time difference. In this paper, we present calculating the cross-correlation between the two signals to infer the time-lagged to apply UWAC. We also present the experimental result of estimating the arrival time by using cross-correlation. We get EXCORR = 0.003055 second as the estimation error in mean absolute difference.

최근에 수중 음향통신에 대한 연구가 많은 연구자들에 의해 연구되어왔다. 수중 환경 UWAC를 사용하기 위해서는 두 신호들 사이의 시간차이를 추정하는 것이 필요하다. 일반적으로 두 신호 시아의 시간차이를 추정하는 기법으로는 배경 영역이 없는 시간을 추정하여 시간 차이를 추정하는 기법, 시간을 추정하여 두 신호 사이의 상호 상관을 추정하는 기법, 시간 차이 추정을 위한 위상지연을 추정하는 기법이 주로 사용된다. 본 논문에서는 UWAC에 적용하기 위하여 시간 지연 추정에 의한 두 신호 사이의 상호상관을 계산하고 이 상호 상관을 이용한 도착 시간의 추정 결과를 0.003055 초가 됨을 보인다.

Keywords

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