Visible Light Communication for IoT

Traditional methods of wireless communication are saturating in terms of data rate, frequency spectrum and reliability. Visible Light Communication (VLC) integrated with the emerging technology of Internet-of-Things (IoT) opens up to wide range of indoor applications. Device-to-Device communication requires reliable uplink along with the high speed downlink, which uses LEDs and photodetectors integrated into the device. Shortage of energy budget has led to emergence of the energy efficient variant of the VLC i.e. VLC in the dark, which works with extremely low level of illuminance. It consumes much lower energy than the conventional VLC, which makes it more suitable for IoT applications. VLC aims to achieve transmission rates of upto 100 Gbps over free space link. The proposed system design aims to overcome the limitations of traditional VLC by combining the features of different methodologies such as VLC in dark and use of OFDM for data transmission by mapping the serial data using QAM. The system specifies transmission protocols along with the transmitter and receiver end circuitry.