[1] National Institute of Telecommunications, Santa Rita Do Sapucaí, Minas Gerais, Brazil
[2] TRICOD Equipamentos Eletrônicos Indústria e Comércio LTDA, Minas Gerais Itajubá, Brazil
[3] Research Group on Systems and Computer Engineering, Federal University of Itajubá, Minas Gerais Itajubá, Brazil