Data Science and Intelligent Computing Techniques
Li-Fi Transmission and Reception in Visible and IR Light in a Hospital Environment
Authors: Vilma Fernandes, Jivan Parab, Caje Pinto and Gourish M. Naik
Publishing Date: 13-01-2023
ISBN: 978-81-955020-2-8
Abstract
Li-Fi (Light Fidelity) is an important green technology being sought after these days. It is used in environments where Wi-Fi is a constraint, for example in hospitals, airplanes, schools, security installations, etc and areas where higher bandwidth and faster data speeds are required since Wi-Fi signals may interfere destructively with the existing signals generated by these environments. Li-Fi provides security by obeying the principle of the line of sight (LoS) and prevents the signals from leaking out of the room, hence preventing eavesdropping. The Li-Fi technique without modifications for optical communication, degrades and disables the transmitting signal to navigate far within the room. Various factors can be enhanced and adapted to improve the overall efficiency and efficacy, such as modulation, LED and Photodiode arrays in a particular geometrical pattern, alignment and synchronization, optical filters, and lenses to guide the transmitting signal onto the receiver for optimal output response. The paper proposes the improvement of Li-Fi transmission range using modulation techniques in an indoor environment. The authors have demonstrated experimentally, how the LED transmission of signal data through Li-Fi link is improved by implementing a simple OOK modulation. We have also demonstrated the transmission of the data packet of the patients by performing OOK with PWM modulation for transmission and sending a flicker free and constant light current. By doing this the transmission range was improved to 3mtrs, which is Quite acceptable.
Keywords
Light Fidelity (Li-Fi), Wireless Fidelity (Wi-Fi), Visible Light Communication (VLC), IR LED, Field of View (FoV), Line of sight (LoS).
Cite as
Vilma Fernandes, Jivan Parab, Caje Pinto and Gourish M. Naik, "Li-Fi Transmission and Reception in Visible and IR Light in a Hospital Environment", In: Satyasai Jagannath Nanda and Rajendra Prasad Yadav (eds), Data Science and Intelligent Computing Techniques, SCRS, India, 2023, pp. 197-208. https://doi.org/10.56155/978-81-955020-2-8-17