论文标题
可见光通信的实用含量
Practical MIMO for Visible Light Communication
论文作者
论文摘要
可见光通信（VLC）被视为与射频（RF）的互补无线技术。但是，VLC对信号阻塞非常敏感，并且由于光通道的高方向性而遭受阴影。因此，对研究VLC的新方法具有很大的兴趣，例如使用多种天线技术提供空间多样性的使用，可以利用这作为打击信号阻塞和褪色的一种方式。我们提出了由COTS组件组成的完整和低成本MIMO-VLC收发器系统。特别是，我们表明可以使用COTS 802.11N（WIFI）设备，以便将RF WiFi的物理和数据链路层重复用于VLC。此外，这使我们能够直接利用802.11N中可用的多个天线（空间）技术。我们的测量研究结果表明，在存在障碍和节点迁移率的情况下，这种技术在改善VLC链接的鲁棒性方面非常有效。此外，我们表明，还可以使用多个天线来通过空间多路复用来提高VLC的数据速率。
Visible Light Communication (VLC) is seen as a complementary wireless technology to Radio Frequency (RF). However, VLC is very sensitive to the signal blockage and suffers from shadowing due to the high directionality of the optical channel. Hence there is a big interest in researching novel approaches for VLC like usage of multiple antenna techniques providing spatial diversity which can be exploited as a way to combat signal blockage and fading. We present a complete and low-cost MIMO-VLC transceiver system consisting of COTS components. In particular, we show that COTS 802.11n (WiFi) devices can be used so that the physical and data link layers of RF WiFi are reused for VLC. In addition, this allows us to directly utilize the multiple antenna (spatial) techniques available in 802.11n. Results from our measurement study show that such techniques are highly effective at improving the robustness of VLC links in the presence of obstacles and node mobility. Moreover, we show that multiple antennas can also be used to increase the data rate of VLC by means of spatial multiplexing.
