| The Visible Light Communication(VLC) technology based on MIMO( Multiple-Input Multiple-Output) has attracted more and more attention,because of it’s advantages such as secure, reliable and confidential communication, wide channel capacity and efficient spectrum utilization.To ensure timeliness and accuracy of communication, the Visible Light Communication(VLC) technology based on MIMO must can be established synchronization in a very short period of time and have high efficiency synchronous features.Firstly,this article describes the general theory and realization of the VLC system based on MIMO,then explained the hardware design about signal input module, the transmitter and the receiver.After the research and the analyses of the frame synchronization code and frame synchronization scheme, we proposed a MIMO-based multi-channel optimization frame synchronization scheme, and conducted simulation experiments.According to optimize synchronization scheme, we have made the corresponding hardware and software design, applied it to the existing systems,then make experimental testing and comparative analysis. The experimental results have demonstrate the feasibility of the scheme.Finally,We have made an analysis on the performance of the synchronization scheme,and the results shows that the probability of leakage synchronization is about 2*10-4, the synchronization establishing time is about 220 us, the synchronization performance is better than the conventional single-channel synchronous system, it can basically meet the needs of indoor visible light communication system. |
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