The Journal of the Korea Contents Association (한국콘텐츠학회논문지)

The Korea Contents Association (한국콘텐츠학회)
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WLED Communication System Using SC-FDMA Techniques

SC-FDMA기술을 적용한 WLED 통신시스템

  • 이신 (충북대학교 정보통신공학과) ;
  • 박노윤 (충북대학교 정보통신공학과) ;
  • 김영주 (충북대학교 정보통신공학과)
  • Received : 2010.01.06
  • Accepted : 2010.10.15
  • Published : 2010.10.28
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Abstract

In this paper, a WLED communication system with SC-FDMA technique is proposed. OFDM is a promising technique to realize high-speed WLED communication system. However, because of the PAPR, the system performance can be significantly compromised by non-linear distortions in the transmission chain. Furthermore, the overload current due to peak signal power lead the WLED equipment over bright which is harmful to equipment life and human‘s eye. The novel WLED communication system proposed in this paper solved these problems by using SC-FDMA technique which has an inherent low PAPR property. The severity of PAPR performances expressed by CCDF curve and the BER performances under different modulation schemes are analyzed in this paper.

본 논문에서는 SC-FDMA 기술을 적용한 WLED 통신 시스템을 제안하였다. 기존의 WLED 통신 시스템에서는 OFDM 기술을 이용하여 고속의 통신 기술이 구현 가능한 장점이 있지만, 비선형 왜곡에 의한 전송모드에서 PAPR이 발생함에 따라 시스템 성능이 저하되는 단점을 가진다. 더욱이 WLED 장치에서 PAPR에 따른 peak 전력에 의해 정류기가 갑작스럽게 과부하가 발생되면 사람의 시력뿐만 아니라 WLED 시스템에 큰 손상을 미치게 된다. 이를 해결하고자 OFDM에 비해 상대적으로 낮은 PAPR을 갖는 SC-FDMA 기술을 WLED 시스템에 적용하였다. 컴퓨터 시뮬레이션을 통해 본 논문에서 제안하는 WLED 시스템의 PAPR을 측정하고 서로 다른 변조 기법을 적용하였을 경우의 성능 또한 분석한다.

Keywords

References

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