Desenvolvimento de blocos para processamento de dados utilizando plataforma open-source de software-defined radio para controle de sistemas de comunicação por luz visivel

Abstract

As a complement to radio frequency-based communication, the visible light communication helps to decongest the data usage in the electromagnetic spectrum. This work presents a procedural methodology for the development and practical implementation using a Software-Defined Radio platform for the digital control of the system's operations. The proof of the functioning of the blocks for data processing was done through experimental tests carried out by the communication between the LED and photodetector. As a basis for defining the parameters of the physical layer of the system, the IEEE 802.15.7-2018 standard was used. The software used for the digital processing of the system was the GNU Radio, which is characterized by working through the connection between blocks that perform unique and individual routines in the system. For the experimental development of the system, it was necessary to complement the GNU Radio library with new blocks that performed functions that are not native to the program. Therefore, the communication tests were made with the signal carrier frequency at 20MHz, sampling rate at 100kS/s and bandwidth at 300 kHz. The quality of the transmitted signal was obtained by comparing the number of samples lost in the reception of the signal with the ones being sent in a ratio of 10-3 .