Maximum Angle of Light Source for Mobility in Visible Light Communication

Arba?iah Inn, Rosilah Hassan, Dina Fitria Murad, Noraimi Safie
dx.doi.org/10.17576/apjitm-2024-1302-03

Abstract

The Internet of Everything (IoE) makes connectivity more relevant across all smart devices. This has caused the use of Radio Frequency (RF) spectrum resources to become increasingly saturated. To overcome this issue, new wireless communication technologies are proposed to meet the demand and improve system performance and overcome existing bandwidth limitations. For short-range and indoor communication, the use of light is one of the significant techniques in Visible Light Communication (VLC) system. Studies shows that Light Fidelity (LiFi) based on VLC using Orthogonal Frequency Division Multiplexing (OFDM) modulation technique is one of the promising technologies based on optical wireless communication. Since the coverage area of LiFi is small depending on the Light Emitting Diode (LED), there will be a frequent movement between one access point (PA) to another PA. The research done is using the Path Loss Model to get the minimum power of the receiver using a mathematical model, MATLAB R2021a. Studies were also conducted to obtain the maximum coverage area for PA with reference to Signal to Noise Ratio (SNR), data rate, and spectral efficiency. The minimum power of the receiver, refers to the minimum value of two separate simulations, which are Line of Sight (LOS) signal, SNR=633.4 dB and Non-Line of Sight (NLOS) signal, SNR=-194.5 dB. Findings from the SNR (LOS) is used to obtain reliable reception and enable a soft handover process between two PAs. The results of this study proved that it is possible to build a controllable PA that can expand the coverage area.

keyword

Visible Light Communication (VLC), Light-Fidelity (LiFi), LED, MATLAB

Area

Network Communication and Technology