The Correlation Coefficient for Different Distances in The Transmission and Receiving Process of The Optical System Model

Abstract

This paper presents the design and calculation of the autocorrelation coefficient for varying distances between the transmitter and receiver in an optical communication system. A prototype was developed utilizing the Arduino Uno microcontroller to achieve key performance metrics, such as enhanced optical wireless transmission and reception speeds, minimized interference, and reduced physical dimensions. Furthermore, the integration of multiple wireless technologies offers the potential for optical wireless devices to operate across various frequency bands. In comparison to traditional wireless technologies that utilize the radio frequency spectrum, data transmission via visible light communication (VLC) provides a more secure medium with the potential for significantly higher data transfer rates. This research explores optical wireless communication techniques by transmitting data and establishing a VLC system capable of sending text data between two computers through visible light. In this setup, a light-emitting diode (LED) serves as the transmitter, air as the transmission medium, and a solar panel as the receiving element. Texts of varying lengths, ranging from 10 to 160 characters, were transmitted over distances between 2 cm and 100 cm. Through multiple experimental trials, data was successfully transmitted, and the speed of text reception was measured using C language embedded in the Arduino Uno controller on the receiving circuit. The results were further analyzed by calculating the correlation coefficients for each data pair measured at different distances between the transmitter and receiver circuits. The findings demonstrate that VLC operates as a linear system with reliable connectivity.