Análisis de las características de desempeño de una red Li-Fi mediante simulación de un sistema de transmisión utilizando el software Matlab

Abstract

This article shows the design of a Li-Fi communication system using the OFDM (Orthogonal Frequency Division Multiplexing) modulation technique through Matlab software in which it begins with the study of OWC (Optical Wireless Communication) communications exposing the advantages and disadvantages in different application areas. In Matlab, the different stages of the Li-Fi (Light Fidelity) structure are represented through coding, which contains the generation of data, type of modulation, the transformation of optical emitter and receiver signals and the demodulation of the signal, with this performance data is collected in the different scenarios for a comparative analysis and thus verify the visible spectrum that best suits internal environments. Two scenarios with different characteristics are proposed, these being the number of leds and pd used and the positions, for one scenario a single led and pd located in the center of the room are used, an SNR value of 16 dB was obtained while the scenario where more than one LED is used and pd requires 11 dB less power to reach an acceptable BER level.