Development of visible light communication system using arrayed LED technique for wireless connectivity

Razali, Ridzwan Afif (2021) Development of visible light communication system using arrayed LED technique for wireless connectivity. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Over the last decade, optical wireless communication (OWC) has attracted a lot of attention. OWC is seen as an alternative as well as a promising interdependent communication approach to the traditional radio frequency (RF) approach, which uses a controlled and licenced electromagnetic spectrum band spanning 30 kHz to 300 GHz [1]. There are crises arising within the RF spectrum as a result of an exponential expansion in wireless data traffic and smart mobile devices. This rise causes a spectrum crisis, resulting in congestion and low maximum data rates compared to OWC. Due to the advantages of Visible Light Communication technology over conventional lighting technologies, the use of LED technology has increased in recent years. One of these advantages is its potential to quickly switch on and off, allowing data to be transmitted using light as a channel. This project's designed transmitter and receiver are tested in simulation with the software OptiSystem for the optical part and Proteus for the electrical part, and the prototype is then produced. Different types of electrical modulator, different distance of FSO Channels and different numbers of LED will be tested in the OptiSystem simulation. Both the transmitter and receiver units will also simulated in Proteus. Arduino Nano is used to create the final prototype for the optical and electrical parts. The project's findings were analysed and compared. The constructed VLC system has been tested in two conditions. First is by varying the distance between transmitter and receiver units. The second condition is by varying the illumination intensity of LEDs. To be conclude, the higher the number of LEDs used for data transmission and the closer the distance between transmitter unit and receiver unit, the better the performance of the system.

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