200 Mb/s visible optical wireless transmission based on NRZ-OOK modulation of phosphorescent white LED and a pre-emphasis circuit
200 Mb/s visible optical wireless transmission based on NRZ-OOK modulation of phosphorescent white LED and a pre-emphasis circuit
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DOI：
10.3788/col201412.100604
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发表时间：
2014-10
影响因子：
3.5
通讯作者：
Honglei Li;Xiongbin Chen;Junqing Guo;D. Tang;Beiju Huang;Hongda Chen
中科院分区：
文献类型：
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作者：
Honglei Li;Xiongbin Chen;Junqing Guo;D. Tang;Beiju Huang;Hongda Chen
我们提出了一种高速可见光通信（VLC）的链接，使用市售的磷光白色发光二极管（LED）。这类器件由于磷光元件响应慢，带宽只有几兆赫，严重限制了VLC系统的传输数据速率。我们提出了一个简单的预加重电路。采用蓝光滤波和预加重电路，VLC系统的带宽可从3 MHz提高到77.6 MHz，非归零开关键控（NRZ-OOK）数据传输速率可达200 Mb/s，误码率为5.3 × 10-7，低于10-6。VLC链路使用单个1 W白色LED，在1.1 m范围内以约1000 lx的室内照明水平工作。
We present a high-speed visible light communication (VLC) link that uses a commercially available phosphorescent 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.