Codigos restritos para se reduzir o numero de fotons por bit em transmissão optica : Rony Mark da Silva

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

The present work aims at the study of line codes for Optical Transmission leading to an economy in the number of photons per bit required by this kind of communication. The codes chosen are those with (d,k) and RLL (Runlength-limited) constraints. A Photonic Efficiency Gain is generically defined, which takes place when a line coding is used. Next, the mathematical expressions to calculate that gain and to allow the construction of graphics of Entropy versus sparseness are obtained, so that a Maximum Photonic Efficiency operating point can be determined. Then, a graphical analysis is presented, as well as the numerical methods used to obtain those graphics. An application example is developed, showing the study and analysis of a complete project of acode with the d =2 constraint. As a conclusion, the results obtained throughout the work showed that line coding in optical transmission is an interesting alternative to reduce the optical power inside the fiber, decreasing its non-linear effects, with a potential practical application in WDM Systems

ASSUNTO(S)

sistemas de telecomunicação teoria da codificação entropia (teoria da informação)

ACESSO AO ARTIGO

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