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出 处:《Chinese Optics Letters》2014年第10期16-19,共4页中国光学快报(英文版)
基 金:supported by the National "973" Program of China(Nos.2013CB329205 and 2011CBA00608);the National "863" Program of China(Nos.2013AA013602,2013AA013603,2013AA03A104,and 2013AA031903);the National Natural Science Foundation of China(Nos.61036002 and 61178051)
摘 要:We present a high-speed visible light communication (VLC) link that uses a commercially available phos- phorescent white light-emitting diode (LED). Such devices have few megahertz bandwidth due to the slow response of phosphorescent component, which severely limit the transmission data rate of VLC system. We propose a simple pre-emphasis circuit. With blue-filtering and the pre-emphasis circuit, the bandwidth of VLC system can be enhanced from 3 to 77.6 MHz, which allows non-return-to-zero on-off-keying (NRZ- OOK) data transmission up to 200 Mb/s with the bit error ratio of 5.3 × 10-7 which is below 10-6. The VLC link operates at the room illumination level of -1000 lx at 1.1 m range using a single 1 W white LED.We present a high-speed visible light communication (VLC) link that uses a commercially available phos- phorescent white light-emitting diode (LED). Such devices have few megahertz bandwidth due to the slow response of phosphorescent component, which severely limit the transmission data rate of VLC system. We propose a simple pre-emphasis circuit. With blue-filtering and the pre-emphasis circuit, the bandwidth of VLC system can be enhanced from 3 to 77.6 MHz, which allows non-return-to-zero on-off-keying (NRZ- OOK) data transmission up to 200 Mb/s with the bit error ratio of 5.3 × 10-7 which is below 10-6. The VLC link operates at the room illumination level of -1000 lx at 1.1 m range using a single 1 W white LED.
关 键 词:Bandwidth Data communication systems Detector circuits LIGHT Light emission Light transmission Optical communication PHOSPHORESCENCE Wave transmission
分 类 号:TN929.1[电子电信—通信与信息系统]
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