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2020 Vol.39, Issue 6 Preview Page

Research Article

A study on threshold detection algorithm for adaptive transmission in underwater acoustic communication

수중 음향 통신에서 적응형 전송을 위한 임계값 검출 알고리즘

Ji-Won Jung1
,
In-Soo Kim2*
정 지원1
,
김 인수2*
1한국해양대학교
2국방과학연구소
*Corresponding Author
30 November 2020. pp. 585-591
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Abstract

The adaptive transmission techniques are efficient method for underwater acoustic communication to improve the system efficiency by varying transmission parameters according to channel conditions. In this paper, we construct four transmission modes with different data rates using the convolutional codes, which is freely set to size of information bits. On the receiver side, one critical component of adaptive system is to find which mode has best performance. In this paper, we proposed threshold detection algorithm to decide appropriate mode and applied turbo equalization method based on BCJR decoder in order to improve performance. We analyzed the performance of four modes based on threshold detection algorithm through the lake experiment.

Keywords
Underwater acoustic communication
Adaptive transmission techniques
Transmission mode
Threshold detection algorithm
Convolutional code
Turbo equalization

적응형 전송 기법은 수중 음향 채널의 상태에 따라 전송 파라미터를 변경하여 전송 및 성능을 향상 시키는 효율적인 방법이다. 본 논문에서는 적응형 전송 기법에서 전송 모드를 결정하기 위한 네 가지 모드와 이의 모드를 검출하기 위한 세 가지 임계값 검출 알고리즘을 제안한다. 송신기에서 정보비트의 크기를 자유롭게 설정하기 위하여 컴볼루션 부호를 사용하였으며, 수신기에서는 성능을 향상시키기 위하여 BCJR 복호 기반 터보등화기법을 적용하였다. 또한 수중 실험을 통해 각 모드에서 성능을 만족하는 임계값 간의 관계를 분석하였다.

키워드
수중 음향 통신
적응형 전송 기법
전송 모드
임계값 검출 알고리즘
컨볼루션 부호
터보 등화 기법
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Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 39
  • No :6
  • Pages :585-591
  • Received Date : 2020-09-23
  • Revised Date : 2020-10-19
  • Accepted Date : 2020-10-28
  • DOI :https://doi.org/10.7776/ASK.2020.39.6.585
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