文档介绍：第 36 卷第 9 期 电 子 与 信 息 学 报
2014 年 9 月 nt distance parameters in this model. Thus, the mathematical expressions of the spatial correlation
coefficients of both transmit and receive channel are derived, which can provide a theoretical guide to the layout of
the indoor VLC MIMO system. The simulation results regarding the channel matrix condition verify that the
channel spatial correlation becomes stronger with the decreasing of Light Emitting Diode (LED) spacing,
PhotoDetector (PD) spacing, and the increasing of the vertical distance from LED to PD. In addition, the channel
capacity simulation results show that the channel capacity can be enhanced by increasing the number of LED and
PD, whereas the channel capacity gain can be reduced with stronger channel spatial correlation.
Key words: Optical wireless communication; Indoor visible light communication; MIMO; Spatial correlation;
Channel capacity
1 引言 Detector, PD)等光电转换器件接收光载波信号并获
可见光通信(Visible Light Communication, 得信息。VLC 作为一个全新的无线通信手段，引起
VLC)是一种利用可见光波段的光作为信息载体、在 国内外越来越多的关注，也是今后无线通信的一个
白光发光二极管(Light Emitting Diode, LED)技术 重要