DOI QR코드

DOI QR Code

A Study on the Path Loss of Underwater Acoustic Channel Based on At-sea Experiment at the South Sea of Korea

남해 실해역 시험 기반 수중음향채널 경로손실에 관한 연구

  • Kim, Min-Sang (Oceanic IT Convergence Technology Research Center, Hoseo University) ;
  • Lee, Tae-Seok (Oceanic IT Convergence Technology Research Center, Hoseo University) ;
  • Cho, Yong-Ho (Oceanic IT Convergence Technology Research Center, Hoseo University) ;
  • Im, Tae-Ho (Oceanic IT Convergence Technology Research Center, Hoseo University) ;
  • Ko, Hak-Lim (Oceanic IT Convergence Technology Research Center, Hoseo University)
  • Received : 2019.11.28
  • Accepted : 2019.12.31
  • Published : 2020.03.31

Abstract

Recently, studies on underwater communication, related to the development of underwater resources, disaster monitoring and defense, have been actively carried out. In the design of wireless communication systems, path loss is the most important information to derive a link budget that is required to guarantee communication reliability by calculating received power level for the given communication link. The underwater acoustic channel have different characteristics according to geographical location and relevant environmental factors such as water temperature, depth, wave height, algae, and turbidity. Subsequently, many research institutes aiming to develop underwater acoustic communication systems are researching actively on the underwater acoustic channels in various sea areas. In Korea, however, studies on the path loss of the acoustic channel are still insufficient. Therefore, in this study, the path loss of the acoustic channel are studied based on measurement data of the at-sea experiment conducted at Geohae-do, southern sea of Korea.

최근 수중 자원개발, 재난 감시 및 국방에 관련하여 수중 통신에 대한 연구가 활발히 진행 중이다. 무선통신 시스템 설계에서 경로손실은 주어진 통신 링크에 대한 수신 전력 레벨을 계산하여 통신 신뢰성을 보장하는데 필요한 링크 예산을 도출하기 위한 중요한 정보이다. 수중음향채널은 각 해역에 따라 수온, 수심, 파고, 조류, 탁도 등에 의해 서로 다른 특성을 보이며, 각 해역별 수중음향채널의 경로손실은 서로 다른 특성을 갖는다. 따라서 수중음향 통신 시스템개발을 목적으로 하는 전 세계의 여러 연구기관에서는 다양한 해역에서 수중음향채널에 대한 연구가 활발히 진행되고 있다. 하지만 국내는 아직까지 수중음향채널의 경로손실에 대한 연구결과가 매우 부족하다. 따라서 본 연구에서는 남해 거제도 천해역의 실해역 측정을 통해 경로손실을 추정하였으며, 기존 연구에서 제안한 경로손실 수식에 남해의 환경정보를 적용하여 도출한 결과를 비교하여 그 차이를 확인하였다.

Keywords

References

  1. C. Lal, R. Petroccia, K. Pelekanakis, and J. Alves, "Toward the Development of Secure Underwater Acoustic Networks," IEEE Journal of Oceanic Engineering, vol. 42, no. 4, pp. 1075-1087, Jul. 2017. https://doi.org/10.1109/JOE.2017.2716599
  2. S. Jiang, "On Securing Underwater Acoustic Networks: A Survey," IEEE Communications Surveys & Tutorials, vol. 21, no. 1, pp. 729-752, Aug. 2018. https://doi.org/10.1109/COMST.2018.2864127
  3. G. Burrowes, and J. Y. Khan, Autonomous Underwater Vehicles, Mr. Nuno Cruz(Ed.), pp. 173-198, Intech, 2011.
  4. N. Bahrami, N. Khamis, and A. Yahya, "Underwater Channel Characterization to Design Wireless Sensor Network by Bellhop," TELKOMNIKA, vol. 14, no. 1, pp. 110-118, Mar. 2016. https://doi.org/10.12928/telkomnika.v14i1.2454
  5. J. G. Proakis, Digital Communications, 4th ed. New York, NY: McGraw-Hill, 1993.
  6. J. T. Hansen, "Link Budget Analysis For Undersea Acoustic Signaling," United States Navy P.S. Auburn University, Jun. 2002.
  7. R. J. Urick, Principle of Underwater Sound, 3rd. Edition Peninsula Publishing, 1996.
  8. G. M. Wenz, "Acoustic Ambient Noise in the Ocean: Spectra and Sources," Journal of the Acoustical Society of America, vol. 34, no. 12, pp. 1936-1956, 1962. https://doi.org/10.1121/1.1909155
  9. Y. H. Cho, T. S. Lee, and H. L. Ko. "Performance Analysis of OFDM-based Underwater Communication Systems for time-varying underwater channel in Western sea of Korea," The Journal of Korean Institute of communications and Information Sciences, vol. 43, no. 10, pp.1654-1663, Oct. 2018. https://doi.org/10.7840/kics.2018.43.10.1654
  10. K. Y. Kim, M. S. Kim, H. L. Ko, and T. H. Im, "Performance analysis of OFDM and CDMA communication methods in underwater acoustic channel," The Journal of the Acoustical Society of Korea, vol. 38, no. 1, pp. 30-38, Jan. 2019. https://doi.org/10.7776/ASK.2019.38.1.030