DOI QR코드

DOI QR Code

A Study on Multi-carrier Technique for High-speed Data Transmission in Underwater Communication

수중통신에서 고속 데이터 전송을 위한 다중반송파 기법 연구

  • Han, Jeong-Woo (Dept. of Radio Communication Engineering, National Korea Maritime University) ;
  • Kim, Ki-Man (Dept. of Radio Communication Engineering, National Korea Maritime University) ;
  • Son, Yoon-Jun (Defense Agency for Technology and Quality)
  • Received : 2008.08.07
  • Accepted : 2010.04.28
  • Published : 2010.04.30

Abstract

The performance of underwater wireless communication system is influenced on channel characteristic. Especially, a delay spread cause by reverberation and multi-path happen the ISI (Inter Symbol Interference) and reduces the communication performance. In this paper, we study the application of high speed data transmission in underwater to use the OFDM (Orthogonal Frequency Division Multiplexing) technique for robust the reverberation and multi-path. we confirm the performance of communication in underwater to use the model for actually underwater channel simulation model. As a result, we acquired the BER of modulation techniques. The BER of single carrier is $2{\times}10^{-1}$ and BER of multi carrier is $8{\times}10^{-2}$ in 1000m.

수중무선통신 시스템의 성능은 수중채널의 특성에 영향을 받으며, 특히 잔향 및 다중경로(Multi-path)로 인한 지연확산은 데이터 전송 시 인접심벌간의 간섭(Inter Symbol Interference : ISI)를 발생시켜 통신의 성능을 저하시킨다. 본 논문에서는 잔향 및 다중경로로 인한 인접 심벌간의 간섭에 강한 성능을 나타내는 OFDM(Orthogonal Frequency Division Multiplexing) 기법을 이용하여 수중에서 고속 데이터 전송의 적용성을 검토하였다. 실제 수중 채널을 모의하는 모델을 사용하여 수중에서 통신 성능을 확인하였다. 그 결과 1000m의 거리에서 단일 반송파의 경우 BER이 $2{\times}10^{-1}$ 이였으며, 다중 반송파의 경우 BER이 $8{\times}10^{-2}$이었다.

Keywords

References

  1. 손근영, 노용주, 윤종락(2000), “수중 데이터 통신 시스템 개발 - 변조 방식의 성능 분석,” 한국음향학회 학술발표대회 논문집, 19권, 2호(s).
  2. 이외형, 손윤준, 김기만(2002), “하이드로폰 송신 어레이를 이용한 수중 음향 통신 시스템의 성능 향상,” 한국음향학회지, 21권, 7호, pp.606-613.
  3. 윤종락, 백승관, 박지현, 임춘단(2002), “FSK 방식의 수중 데이터 전송 특성 해석,” 제4회 해상무기체계 발전 세미나 논문집, pp.299-303.
  4. Baggeroer, A.(1984), "Acoustic telemetry - an overview," IEEE J. Oceanic Eng., vol.9, no.4, pp.229-235. https://doi.org/10.1109/JOE.1984.1145629
  5. Bahai, A. R. S., Saltzberg. B. R., and Ergen, M. (2004), Multi-carrier digital communications : theory and applications of OFDM, Springer.
  6. Coatelan, S., and Glavieux, A.(1995), "Design and test of a coding OFDM system on the shallow water acoustic channel," in Proc, of MTS/IEEE OCEANS conference, Vol.3, pp.2065-2070. https://doi.org/10.1109/OCEANS.1995.528896
  7. Kilfoyle, D. B., and Baggeroer, A. B.(2000), "The state of art in underwater acoustic telemetry," IEEE J. Oceanic Eng., vol.25, no.1, pp.4-27. https://doi.org/10.1109/48.820733
  8. Kaya, A., and Yauchi, S.(1989), "An acoustic communication system for subsea robot," IEEE Oceanic Eng. Conf., Seattle, pp.765-770. https://doi.org/10.1109/OCEANS.1989.586677
  9. Li, B., Zhou, S., Stojanovic, M., Freitag, L., and Willet, P.(2007), "Non- uniform Doppler compensation for Zero-padded OFDM over fast-varying underwater acoustic channels," IEEE Oceans Conf. https://doi.org/10.1109/OCEANSE.2007.4302478
  10. Lee, O. H., Son, Y. J., and Kim, K. M. (2002), "Underwater acoustic communications using channel estimation," IEEE Oceanic Eng. Conf., vol.3, pp.2453-2456. https://doi.org/10.1109/OCEANS.2002.1192011
  11. Nee, R. V. and Prasad, R.(2000), OFDM for wireless multi-media communications, Artech House.
  12. Suzuki, M., and Sasaki, T.(1992), "Digital acoustic image transmission system for deep sea research submersible," IEEE Oceanic Eng. Conf., pp.567-570. https://doi.org/10.1109/OCEANS.1992.607839
  13. Stojanovic, M.(2008), "OFDM for underwater acoustic communications: Adaptive synchronization and sparse channel estimation,” in Proc. of Intl. Conf. on Acoustics, Speech and Signal Proc.