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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Spectral Analysis of Flickering Effects in Binary Dimmable Visible Light Communication

조명의 디밍을 지원하는 이진 가시광 통신에 대한 플리커의 주파수 분석

  • Lee, Sang Hyun (Sejong University Department of Information and Communications Engineering) ;
  • Kwon, Jae Kyun (Yeungnam Univrsity Department of Electronic Engineering)
  • Received : 2014.10.31
  • Accepted : 2015.01.06
  • Published : 2015.01.30
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Abstract

This paper presents an impact of flicker for various binary modulations of visible light communication (VLC) under dimming requirement. While previous approaches consider the statistics of the signal that cannot capture contributions of dynamic impacts of flicker, the power spectral density is evaluated for various VLC transmission schemes of dimming support. This enables to compare transmission schemes with the contribution of low and intermediate frequency components to flicker. Numerical results show that analog dimming has advantages over other techniques in terms of flicker and signal processing with waveforms and symbol distribution allows to mitigate flicker effects.

본 연구는 디밍 요구 사항 하에서 가시광 통신 시스템의 다양한 이진 변조 방식들에 대한 플리커 효과의 영향에 대해 분석하였다. 기존의 플리커에 관한 분석 연구는 신호의 통계만을 고려하여 플리커의 동적 현상을 효과적으로 기술하지 못하였으나 본 연구에서는 전력 스펙트럼을 적절히 이용하여 가시광 신호에 대한 저주파 플리커의 영향을 비교 분석하였다. 그 결과, 플리커 측면에서는 변조 방식들 중 아날로그 디밍이 우수하며 또한 신호의 파형 및 분포에 대한 처리를 통해 플리커를 완화할 수 있음을 확인하였다.

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References

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