| 高家利.基于预失真四进制辐移键控调制的可见光通信系统[J].光电子激光,2014,(8):1502~1505 |
| 基于预失真四进制辐移键控调制的可见光通信系统 |
| Visible light communication system based on pre-distorted 4ASK modulation |
| 投稿时间：2014-03-14 |
| DOI： |
| 中文关键词: 可见光通信(VLC) 白光LED 预失真 四进制辐移键控(4ASK) |
| 英文关键词:visible light communication (VLC) white LED pre-distorted 4amplitude shi ft keying (4ASK) |
| 基金项目: |
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| 摘要点击次数: 2015 |
| 全文下载次数: 148 |
| 中文摘要: |
| 白光LED不仅可以用来照明还可以作为通信系统的 光源,近年来随着光电器件性能的提高,室内可见光通信系统的研究成为热点。但照明用白 光LED受自身器件特性限制,有效带宽 仅为1MHz,为了在有限的带宽内提高通 信速度和通信质量,设计了一种预失真的四进制辐移键控(4ASK)调制方案。在系统的发射端 采用RC均衡和预失真电路,用以缓解 LED带宽不足的情况；通过模拟实验得到最优化的参数后,搭建了可见光通信(VLC)传输系统 的硬件电路。实验结果表明, 在1m的传输距离内,系统最快传输速率可达到20MHz/s,误码率(BER) 小于10－6。 |
| 英文摘要: |
| The white LED is used not only for lighting,but also as the light so urce in communication systems.In recent years,as the performance of the optoelectronic devices improves,the indoor visib le light communication system has attracted much attention of researches.But the efficient bandwidth of whit e LED used for illumination is around 1MHz due to its device characteristics.To improve the rate and the quality of t he communication,a demodulation scheme is designed based on pre-distorted 4amplitude shift keying (4ASK) and t he visible light communication transmitting system is constructed.To relieve the LED′s bandwidth deficiency,the RC equalization and pre-distorted circuit are used at transmitting terminal of the visible light communication system.The optimization parameters are got by simulation.The hardware circuit of the visible light communication system is built.The experimental results show that t he maximum bi t rate is up to 20Mbit/s,the bit error rate (BER) is less than 10－6,and the communication distance is about 1m. |
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