Modulation Techniques for Li-Fi

查看全文 作　　者：Mohamed Sufyan [1]Islim;Harald [1]Haas

机构地区：[1]Li-Fi Research and Development Centre, Institute for Digital Communications, University of Edinburgh

出　　处：《ZTE Communications》索引2016年第14卷第2期,共12页

基　　金：support by the UK Engineering and Physical Sciences Research Council(EPSRC)under Grants EP/K008757/1 and EP/M506515/1 摘　　要：Modulation techniques for light fidelity(Li-Fi) are reviewed in this paper.Li-Fi is the fully networked solution for multiple users that combines communication and illumination simultaneously.Light emitting diodes(LEDs) are used in Li-Fi as visible light transmitters,therefore,only intensity modulated direct detected modulation techniques can be achieved.Single carrier modulation techniques are straightforward to be used in Li-Fi,however,computationally complex equalization processes are required in frequency selective Li-Fi channels.On the other hand,multicarrier modulation techniques offer a viable solution for Li-Fi in terms of power,spectral and computational efficiency.In particular,orthogonal frequency division multiplexing(OFDM) based modulation techniques offer a practical solution for Li-Fi,especially when direct current(DC) wander,and adaptive bit and power loading techniques are considered.Li-Fi modulation techniques need to also satisfy illumination requirements.Flickering avoidance and dimming control are considered in the variant modulation techniques presented.This paper surveys the suitable modulation techniques for Li-Fi including those which explore time,frequency and colour domains. 关键词：调制技术无线网络正交频分复用信道频率计算效率发光二极管频率选择性光发射机

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Modulation Techniques for Li-Fi

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