Visible Light Communication Based Indoor Positioning System

In today's world, we use Global Positioning System(GPS) to get accurate location of the user. Basically, how a GPS works is that it uses satellites which constantly send signals and the receiver of our device interpret these signals. The receiver calculates the distance from multiple satellites and predict the location. However, you might have noticed GPS lacks precision inside multi-storey buildings such as malls, business centers, residential buildings, etc. So we propose the use of Indoor Positioning System(IPS) using Li-Fi technology. Indoor Positioning System helps in providing location where satellite signals are not reachable. Beacons or tags are installed in buildings or on objects to be tracked. Special receivers are used to interpret the signals from these devices and predict exact coordinates of the user or object. The beacons must be installed separately, so we can use already installed LED light bulbs for this purpose. Light Fidelity (Li-Fi) Technology can be integrated with IPS to provide better solutions. Li-Fi uses LEDs to transmit data in Visible Light Spectrum. This is known as Visible Light Communication(VLC). It provides advantages like higher speed, more security, low latency and higher efficiency than Wi-Fi. It basically changes the intensity of LED more quickly than the human eye can percept. The receiver retrieves data and process it. The use of Li-Fi in IPS can provide efficient results. Li-Fi transmitter and receivers are used and Arduino Uno as microcontroller. Every LEDs transmit unique bits and the receiver interpret this to give exact coordinates of the user. This technology can be useful in places where directions are not mentioned or in any way the user is unable to access the directions.