The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Performance Evaluation Criterion of FTN-Based Transmission System

FTN 기반 전송 시스템의 성능 평가 기준에 관한 연구

  • 곽상운 ;
  • 윤정일 ;
  • 백명선 (한국전자통신연구원 방송?미디어연구소 방송시스템연구부 나노미디어전송연구실) ;
  • 임형수 (한국전자통신연구원 방송?미디어연구소 방송시스템연구부 나노미디어전송연구실)
  • Received : 2016.09.03
  • Accepted : 2016.11.01
  • Published : 2016.11.30
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Abstract

FTN(Faster-Than-Nyquist) signaling is a method of transmitting symbols at rates faster than the Nyquist rate in the same bandwidth by overlapping transmission pulses. The transmission power of the FTN signal is greater than that of the Nyquist signal, because the number of symbols in the FTN signal is larger than that in the Nyquist signal for the same time interval. Hence, to evaluate the performance of an FTN-based transmission system properly, the performance evaluation criterion should be carefully set, and conversion formulas among the criteria which are used in Nyquist-based system should also be applied attentively. In this paper, the performance evaluation criteria of the FTN-based transmission system is analyzed and a valid way to set the criteria is proposed.

FTN(Faster-Than-Nyquist) 전송 방식은 송신 펄스를 중첩시켜 동일한 대역폭 내에서 나이퀴스트(Nyquist) 율보다 빠른 속도로 심볼을 전송하는 기법이다. FTN 전송 방식을 적용하면 동일한 시간 구간 동안 나이퀴스트 전송 방식보다 많은 수의 심볼이 존재하게 되므로, 심볼 당 에너지가 같을 때 신호의 송신 전력이 커진다. 따라서 FTN 기반 전송 시스템의 올바른 성능 평가를 위해서는 이 점에 유의하여 성능 평가 기준을 설정하여야 하며, 기존 나이퀴스트 기반 전송 시스템에서 활용되던 성능 평가 기준 간의 환산 공식 또한 주의하여 활용할 필요가 있다. 본 논문에서는 FTN 전송 방식이 적용된 시스템에서의 성능 평가 기준과 관계식에 대해 분석하고 타당한 성능 평가 기준을 제시한다.

Keywords

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