Estudo de transmissão de dados em faixa larga sobre redes de energia elétrica

Detalhes bibliográficos
Ano de defesa: 2010
Autor(a) principal: Lima, Gilberto Castro
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Programa de Pós-graduação em Engenharia de Telecomunicações
Engenharia de Telecomunicações
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
BPL
Link de acesso: https://app.uff.br/riuff/handle/1/19373
Resumo: Nowadays, the use of power lines has been extensively studied as a medium for transmitting high data rates to deliver broadband services. This new communication system is known as BPL (Broadband over Power Line) in the USA and Brazil and PLC (Power Line Communications) in Europe. Under the economical point of view, the advantage of BPL is associated to the penetration of power line networks everywhere, increasing the capillarity of the conventional telecommunication systems. Consequently, the cost for making accessible Internet and other services to the great public is significantly lower. However, there are important technical problems for communications over power lines, such as signal attenuation, multipath propagation and noise. Based on the characteristics of the BPL channel, this dissertation deals with the analysis these problems, emphasizing particularly the effects of selective fading and impulsive noise. In this study, the existing regulation of the Brazilian agencies ANEEL and ANATEL was taken into account. The technique OFDM (Orthogonal Frequency Division Multiplex) was used to combat the selective fading. QPSK, 8PSK and 16QAM modulations were employed in the simulations of the BPL channel considering the additive white Gaussian noise (AWGN) alone and together with the impulsive noise. In both cases the best performance were achieved with 16QAM. However, when the impulse noise was introduced, the need for correcting codes was observed to maintain the bit error rate below 10-3 without an excessive increase of the signal-to-noise ratio.