대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

수중무선통신 시스템 개발 및 성능시험

Development and It's Real-sea Test of an Underwater Acoustic Communication System

  • 임용곤 (한국해양연구원 해양시스템기술연구본부) ;
  • 박종원 (한국해양연구원 해양시스템기술연구본부) ;
  • 김승근 (한국해양연구원 해양시스템기술연구본부) ;
  • 최영철 (한국해양연구원 해양시스템기술연구본부) ;
  • 김시문 (한국해양연구원 해양시스템기술연구본부) ;
  • 변성훈 (한국해양연구원 해양시스템기술연구본부)
  • Lim, Yong-Kon (Ocean Exploration System Research Division, Korea Ocean Research & Development Institute(KORDI)) ;
  • Park, Jong-Won (Ocean Exploration System Research Division, Korea Ocean Research & Development Institute(KORDI)) ;
  • Kim, Seung-Geun (Ocean Exploration System Research Division, Korea Ocean Research & Development Institute(KORDI)) ;
  • Choi, Young-Chol (Ocean Exploration System Research Division, Korea Ocean Research & Development Institute(KORDI)) ;
  • Kim, Sea-Moon (Ocean Exploration System Research Division, Korea Ocean Research & Development Institute(KORDI)) ;
  • Byun, Sung-Hoon (Ocean Exploration System Research Division, Korea Ocean Research & Development Institute(KORDI))
  • 발행 : 2008.06.18
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초록

We present an implementation and it's real-sea test of an underwater acoustic communication system, which allows the system to reduce complexity and increase robustness in time variant underwater environments. For easy adaptation to complicated and time-varying environments of the ocean, all-digital transmitter and receiver systems were implemented. For frame synchronization the CAZAC sequence was used, and QPSK modulation/demodulation method with carrier frequency of 25kHz and a bandwidth of 5kHz were applied to generate 10kbps transmission rate including overhead. To improve transmission quality, we used several techniques and algorithms such as adaptive beamforming, adaptive equalizer, and convolution coding/Viterbi decoding. For the verification of the system performance, measurement of BER has been done in a very shallow water with depth of 20m at JangMok, Geoje. During the experiment, image data were successfully transmitted up to about 9.6km.

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