Proceedings of the Korea Committee for Ocean Resources and Engineering Conference (한국해양공학회:학술대회논문집)

Korean Society of Ocean Engineers (한국해양공학회)
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A Hybrid Transceiver for Underwater Acoustic Communication

수중음향 통신을 위한 혼합형 송수신기에 관한 연구

  • 최영철 (한국해양연구원 해양개발시스템연구본부) ;
  • 김시문 (한국해양연구원 해양개발시스템연구본부) ;
  • 박종원 (한국해양연구원 해양개발시스템연구본부) ;
  • 김승근 (한국해양연구원 해양개발시스템연구본부) ;
  • 임용곤 (한국해양연구원 해양개발시스템연구본부) ;
  • 김상태
  • Published : 2003.05.23
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Abstract

In this paper, we propose a hybrid transceiver for underwater acoustic communication, which allows the system to reduce complexity and increase robustness in time variant underwater channel environments. It is designed in the digital domain except for amplifiers and implemented by using a multiple digital signal processors (DSPs) system. The digital modulation technique is quadrature phase shift keying (QPSK) and frame synchronization is an energy (non-coherent) detection scheme based on the quadrature receiver structure. DSP implementation is based on block data parallel architecture (BDPA). We shaw experimental results in th? underwater anechoic basin at KRISO. The results indicate that the frame synchronization is performed without PLL. Also, we shaw that the adaptive equalizer can compensate frame synchronization error and the correction capability is dependent on the length of equalizer.

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