Estudos de sistemas OFDM para comunicações ópticas / Studies OFDM systems for optical communications

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

03/10/2012

RESUMO

The development of digital modulation formats in optical communications systems is considered to be a promising way to increase the spectral efficiency and to combat the effects of signal degradation in optical fiber without changing the infrastructure already deployed. In this context, the technique called OFDM (orthogonal frequency division multiplexing) establishes a particular spectral overlap of the subcarriers, which allows data transmission to be multiplexed with high spectral efficiency. The main objective of the research is to study some configurations of optical OFDM systems with direct detection and coherent in order to evaluate their performance against propagation effects. Using the figures of merit BER and constellation diagram to establish the goal of optimal performance, we analyze the OFDM technique with coherent detection in configurations more applicable for optical access networks with extended reach. To validate the results we also present some studies that relate the degradation of the signal in an optical fiber and the OFDM technique. These results were compared with those described in literature, showing good agreement.

ASSUNTO(S)

coherent detection detecção coerente detecção direta direct detection ofdm óptico optical access network optical ofdm qam qam rede óptica de acesso

ACESSO AO ARTIGO

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