Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Performance Analysis of a Trellis coded 4-CPFSK over an Statistical Underwater Acoustic Channel

통계적 수중음향 채널에서 트렐리스 부호화된 4-CPFSK의 성능분석

  • Kang, Hee-hoon (Department of Electronics, Yeoju Institute of Tech.)
  • Received : 2017.02.05
  • Accepted : 2017.05.24
  • Published : 2017.06.25
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Abstract

A channel is very sever in an underwater acoustic communication. Therefore, a modulation method with high spectrum efficiency is needed in an underwater acoustic communication. PSK(phase shift keying) for transmitting 1 bit or 2 bits is robust to noise, but sensitive to noise about more than 3 bits. CPFSK error performance for transmitting 1 bit or 2 bits is similar to that of PSK and CPFSK decreases high frequency components in modulation signal. In the paper, I analyze the performance of trellis coded 4-CPFSK modulation.

수중통신을 위한 채널환경은 매우 가혹하다. 주파수 대역폭의 효율적인 사용이 요구되는 수중음향통신에서는 주파수 대역특성이 좋은 변조 신호가 필요하다. 위상편이변조는 전송비트수가 1이나 2비트일 경우 수신측의 잡음에 대한 민감도는 양호한 편이지만 3비트 이상의 전송인 위상편이변조 방식은 스펙트럼 사용효율을 높일 수 있으나 잡음에 민감하게 된다. 1비트나 2비트 전송에 있어 CPFSK는 성능면에서 동기식 위상편이변조와 비슷하지만 스펙트럼의 고주파 성분을 작게 한다. 본 논문에서는 통계적 수중음향채널에서의 트렐리스 부호화 4-CPFSK방식에 대한 성능을 분석한다.

Keywords

References

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