基于预失真四进制辐移键控调制的可见光通信系统

发布时间：2018-04-23 16:01

本文选题：可见光通信(VLC) + 白光LED　；参考：《光电子.激光》2014年08期

【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。
[Abstract]:White light LED can be used not only for lighting but also as the source of communication system. In recent years, with the improvement of the performance of optoelectronic devices, the research of indoor visible light communication system has become a hot spot. But the white light LED is limited by its own device characteristics and the effective bandwidth is only 1MHz. In order to improve communication speed and communication quality within limited bandwidth, A pre distortion four band 4ASK modulation scheme is proposed. The RC equalization and predistortion circuit are used at the transmitter of the system to alleviate the shortage of LED bandwidth. The hardware circuit of the visible light communication (VLC) transmission system is built after the simulation experiment is obtained. The experimental results show that the transmission distance in 1m is shown. The fastest transmission rate of the system is 20MHz/s, and the bit error rate (BER) is less than 10-6..

【作者单位】：重庆理工大学;
【分类号】：TN929.1

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