Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Design of DUC/DDC for the Underwater Basestation Based on Underwater Acoustic Communication

수중기지국 수중 음향 통신을 위한 DUC/DDC 설계

  • Kim, Sunhee (Department of System Semiconductor Engineering, Sangmyung University)
  • 김선희 (상명대학교 시스템반도체공학과)
  • Received : 2017.03.30
  • Accepted : 2017.05.12
  • Published : 2017.05.31
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Abstract

Recently, there has been an increasing need for underwater communication systems to monitor ocean environments and prevent marine disasters, as well as to secure ocean resources. Most underwater communication systems adopted acoustic communication with a consideration of attenuation, absorption, and scattering in conductive sea water, and developed fully digital modems based on processors. In this study, a digital up converter (DUC) and a digital down converter (DDC) was developed for an underwater basestation based on underwater acoustic communication systems. Because one of the most important issues in underwater acoustic communication systems is low power consumption due to environmental problems, this study developed a specific hardware module for DUC and DDC. It supported four links of underwater acoustic communication systems and converted the sampling rate and frequency. The systemwas designed and verified using Verilog-HDL in ModelSim environment with the test data generated from baseband layer parts for an underwater base station.

최근 해양 자원 개발뿐만 아니라 지구 온난화에 따른 해양 환경 모니터링 및 해양 재난 대비 등을 위하여 수중 무선통신에 대한 연구가 요구되고 있다. 대부분의 수중 무선 통신에서는 수중에서의 매질 특성 및 환경 변화 특성을 고려하여 수십 KHz 대역의 음파를 이용하며, 특히 DSP를 비롯한 프로세서를 기반으로 하여 모뎀 연구가 진행되고 있다. 본 연구에서는 수중 관측 및 제어를 위한 수중 음향 통신 시스템 중 수중기지제어국과 수중기지국 간의 음향 통신을 위한 Digital Up Converter(DUC)와 Digital Down Converter(DDC)를 연구하였다. 수중 음향 통신 시스템은 사용 환경의 제약 때문에 소형 및 저전력 시스템을 추구한다. 따라서, 본 연구에서는 DUC 및 DDC 전용 하드웨어 모듈을 설계하였다. 수중 음향 통신 시스템의 4개의 링크를 지원하며, 각각 샘플링 레이트 및 주파수를 변환하였다. Verilog-HDL를 사용하여 설계하였으며, ModelSim 환경에서 수중 음향 통신 시스템의 베이스밴드 신호를 이용하여 동작을 검증하였다.

Keywords

References

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