  Indoor localization systems based on Visible Light Communication (VLC) have
shown promising advantages compared with systems based on other wireless
technologies. In these systems, many VLC light-emitting diode (LED) anchors are
employed in an indoor space in which location identification messages are sent
to user devices in small packets. In normal beacon network models,
micro-controller (MCU) or low-end system-on-chip (SoC) are often the
coordinators which configure messages for one or many VLC-LED bulbs. In this
paper, we discuss about processing overload and implementation cost of the two
typical models of VLC beacon network in scenarios of a hundred of VLC-LED
anchors are taken into account. Finally, an FPGA-based centralized VLC
transmitter and its aided Nios II-based system has been introduced to enhance
the performance of the VLC beacon network. Besides, due to the centralized
processing, our system model is considered to be more cost-efficient than the
dedicated-processor-based models
