Proposal for Improvement of Information Transmission in OFDM Systems Through the CBEDE Methodology

Resumo

In a world where people are increasingly connected, one of the key challenges is better quality data transmission, just as the increase in demand increases the need for attention to choose the best technology according to each transmission need, mainly by voice and video. The Orthogonal Frequency Division Multiplexing (OFDM) modulation technique has emerged as technological evolution, wherein a conventional transmission system, the symbols are sent in sequence through a single carrier, whose spectrum occupies the entire available frequency range, however OFDM consists in the parallel transmission of data in several subcarriers, with PSK modulation and with sub-carrier transmission rates as low as the number of them. Based on that, the present study implements a model based on discrete events applied to a broadcasting system, using the Simulink of the MATLAB software, aiming to improve the transmission of content, through the pre-coding process of bits applying discrete events in the signal before the modulation process. This proposal brings a different approach, in which the signal transmission on the channel is realized in the discrete domain with the implementation of discrete entities in the process of bit generation. The results show better computational performance related to memory utilization relative to the compression of the information, showing improvement of more than 22%.