Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Optimizing of BCJR Equalization with BCJR Decoder in the Underwater Communication

수중통신에서 최적의 BCJR 등화 기법

  • Kim, Tae-Hun (Department of Radio Communication Engineering, Korea Maritime and Ocean University) ;
  • Jung, Ji-Won (Department of Radio Communication Engineering, Korea Maritime and Ocean University) ;
  • Park, Tae-Doo (Hanwha Corporation Gumi Plant (Development Team3)) ;
  • Lee, Dong-Won (Hanwha Corporation Gumi Plant (Development Team3))
  • Received : 2014.05.30
  • Accepted : 2014.07.02
  • Published : 2014.09.30
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Abstract

The performance of underwater acoustic communication system is sensitive to the inter-symbol interference due to delay spread develop of multipath signal propagation. Thus, it is necessary technique of equalizer and channel code to eliminate inter-symbol interference. In this paper, underwater acoustic communication system were analyzed by experiment using these techniques on the Kyeong-chun lake, Munkyeong City. Based on the results of experiment, we confirmed that the performance of the proposed iterative BCJR equalization method is improved by increasing the number of iterations.

수중에서의 음향 통신의 성능은 신호의 다중경로 전달과정에 의해 발생하는 지역 확산 현상으로 인하여 인접 심볼간 간섭의 영향을 받는다. 따라서 인접 심볼간 간섭을 제거하기 위하여 수중 통신에 적합한 등화기 기술, 채널 부호화 기술이 필요하다. 본 논문에서는 다중 경로 환경에서 원활한 통신과 함께 수신 신호의 성능을 향상시키기 위한 낮은 SNR에서 우수한 성능을 보이는 BCJR 복호기와 다중 경로로 인해 왜곡된 데이터를 보상하기 위한 기법인 결정 궤환 등화기가 결합된 반복기반 BCJR등화기 구조를 제안하고, 경북 문경 경천호에서의 실제 수중 실험을 통하여 제안한 구조의 성능이 반복횟수의 증가에 따라 향상됨을 알 수 있다.

Keywords

References

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