Journal of Convergence for Information Technology (융합정보논문지)

Convergence Society for SMB (중소기업융합학회)
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Performance Evaluation and Analysis of Zero Reduction Codes for Effective Dimming Control in Optical Wireless Communications using LED Lightings

LED조명을 이용한 광 무선 융합 통신 시스템에서 디밍제어를 위한 zero Reduction Code 성능 분석 및 고찰

  • Kim, Kyun-Tak (Department of Electric & Radio Engineering, KywgHee University) ;
  • Lee, Kyu-Jin (Department of Electronic Engineering, Semyung University)
  • 김균탁 (경희대학교 전자전파공학과) ;
  • 이규진 (세명대학교 전자공학과)
  • Received : 2017.06.08
  • Accepted : 2017.06.20
  • Published : 2017.06.30
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Abstract

In this paper, we aim to investigate the generalization of ZRC codes by performing performance analysis on various coding rates and channel conditions of Zero Reduction Code (ZRC) for dimming control in VLC system. Simulation results show that the ZRC codes with relatively high coding rate achieve the enhanced BER performance as the RMS (Root Mean Square) delay spread value increases in the NLOS channelse. Therefore, it is expected that the designing of the dimming control technology using ZRC in the future visible light communication system will help to determine the coding rate according to the channel state through the analysis result in this study.

본 논문에서는 가시광 통신 시스템에서 디밍 제어를 위한 Zero Reduction Code (ZRC)의 다양한 부호화율 및 채널 조건에서 성능 분석을 진행함으로써, ZRC 부호의 특성 일반화 고찰을 목표로 한다. 이를 위해 무선 광 통신 시스템의 LOS (Line-Of-Sight)와 NLOS (Non-LOS) 채널의 특성을 설명하고, (5, 4), (6, 5), (7, 6)ZRC 부호화율에서 디밍 과 BER (Bit Error Rate)측면에서 모의실험을 통해 성능 분석을 진행하였다. 모의실험 결과, 3가지 타입의 부호화율에서 디밍 성능은 비슷하지만, NLOS 채널 환경에서 RMS (Root Mean Square) 지연 확산 값이 증가 될수록 상대적으로 높은 부호화율의 ZRC코드가 좋은 BER성능을 달성하는 것을 확인 하였다. 따라서 향후 가시광 통신시스템에서 ZRC를 이용한 디밍 제어 기술을 설계할 때 본 연구에서 분석한 결과를 통해 채널 상태에 따른 부호화율을 결정하는데 도움이 될 것으로 예상된다.

Keywords

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