HIGH-SPEED VLC LINKS
CHANNEL CHARACTERISTICS
VLC can be applied in various scenarios. One
important parameter for high data rates is the
availability of a line-of-sight (LOS) optical link,
where the transmitter is directed to the receiver
(Fig. 2a), while non-directed LOS transmission
or diffused lighting is likely to limit the achievable
data rates (Figs. 2b and 2c). Thus, the
capacity of the VLC channel depends strongly
on the availability of the LOS path. As the lighting
scenario may vary, a dynamic rate adaption
appears necessary, as already proposed in [6–8],
in order to achieve a robust VLC link.