基于MIMO的可见光通信技术性能研究

A Research on Visible Light Communication Based on MIMO

基于MIMO的可见光通信系统,可以在不改变带宽和发射功率的前提下,通过空间复用的方式,在相同频率信道里将信号分为多个数据流,然后利用不同的发送天线发送各数据列,从而大幅提升信道容量。自Zeng L等在2009年首次在可见光通信系统中引入MIMO技术后,国内外研究者对基于MIMO的可见光通信技术进行了大量研究并取得了诸多成果。例如,3×9 MIMO-OFDM可见光通信系统可以在传输距离为1 m的情况下,将系统的传输速率提升1 Gb/s。但是,基于MIMO的可见光通信技术在我国的研究较少,可量产的成熟产品基本没有。因此,重点探讨基于MIMO的可见光通信技术。

The visible light communication system based on MIMO can divide the signal into multiple data streams in the same frequency channel by spatial multiplexing without changing the bandwidth and transmission power,and use different transmit antennas to transmit each data column,thus greatly improving the channel capacity.Since Zeng L and other researchers first introduced MIMO technology into visible light communication system in 2009,researchers at home and abroad have carried out a lot of research on visible light communication technology based on MIMO,and achieved many results.For example,3×9 MIMO-OFDM visible light communication system can increase the transmission rate of the system by 1 Gb/s under the same transmission distance of 1 m.However,the research of visible light communication technology based on MIMO is less in China,and there are few mature products that can be mass produced.Based on this,the visible light communication technology based on MIMO is discussed.