An indoor visible light communication system employing CAP16 modulation based on interpolation symbol synchronization algorithm

Tian Xingjian; Zhang Minglun

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An indoor visible light communication system employing CAP16 modulation based on interpolation symbol synchronization algorithm

Tian Xingjian #,Zhang Minglun *

State Key Laboratory of Information Photonics and Optical Communications,Ministry of Education,Beijing University of Post and Telecommunications,P.O.Box 66(BUPT),Beijing 100876,China

*Correspondence author

#Submitted by

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Funding: none

Opened online:19 December 2016

Accepted by: none

Citation: Tian Xingjian,Zhang Minglun.An indoor visible light communication system employing CAP16 modulation based on interpolation symbol synchronization algorithm[OL]. [19 December 2016] http://en.paper.edu.cn/en_releasepaper/content/4711871

High spectrum efficiency and low complexity make carrierless amplitude and phase modulation(CAP) become a prominsing method in visible light communition(VLC).However, the receiver of CAP is so highly sensitive to the error of timing because of serious cross chanel interference(CCI) that the system needs a precise synchronization to prevent this kind of interference.In this paper,a feedback loop based on interpolation filter is used on CAP receiver to realize symbol synchroniziaton. Furthermore,we established the transmitter and receiver based on indoor visible light communication system in free space with which we completed an off-line experiment achieving the precise synchronisation of 16CAP signals at the highest speed of 500Mbit/s based on single red led channel;Finally we compared the performance of the system at different distance and speed using this method of symbol synchronisation.

Keywords:communication technology;visible light communication;carrierless amplitude and phase modulation; interpolation synchornisation.

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