1. Graduate Program in Electrical and Computational Engineering; Federal University of Rio Grande Do Norte (UFRN); Av. Senador Salgado Filho, 3000 Natal RN Brazil
2. Communication Engineering Department; Federal University of Rio Grande Do Norte (UFRN); Av. Senador Salgado Filho, 3000 Natal RN Brazil
3. Campus João Pessoa, Federal Institute of Education; Science and Technology of Paraíba; Av. 1 De Maio, 720, Jaguaribe João Pessoa PB Brazil
4. Collegiate of Information Systems Course; State University of Southwest Bahia (UESB); Jequié-BA Brazil