Codigos de linha a partir de codigos corretores de erro concatenados

AUTOR(ES)

Evelio Martin Garcia Fernandez

DATA DE PUBLICAÇÃO

2001

RESUMO

This work deals with the construction of line codes based on concatenated binary error control codes, which are a combination of outer Reed-Solomon codes with inner codes that possess good properties of line coding. The inner codes were obtained by modification of known error correcting codes (block and convolutional) in which the number of consecutive like-symbols (runlength) is limited in the coded sequence. This modification is made maintaining the data transmission rate and the error correcting capacity of the original codes. Simulations results for the Gaussian channel have shown that the performance of the line codes agrees with the performance of the original codes. Through the code concatenation it is possible to obtain error control line codes of practically any length and error correcting capacity. Transformations have also been made in the coded sequences in order to suppress the spectral content at low frequencies. Computer simulations allowed us to check that the designed codes can be made dc-free codes with a slight decrease in the data transmission rate.

ASSUNTO(S)

codigos de controle de erros (teoria da informação) teoria da informação sincronização

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