Desempenho de codigo turbo quaternario em sistemas de multiplexação por divisão de frequencias ortogonais / Performance of quaternary turbo codes in orthogonal frequency division multiplex systems

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

This study evaluates the performance of quaternary turbo codes, with generator matrix G = [7, 5] for the constituent convolutional codes and s-random interleaving , in an OFDM transmission system. This performance is measured in terms of bit error rate versus energy per bit to unilateral noise power spectral density ratio. The results obtained are analyzed comparatively to the Brazilian Digital Television System Standard (SBTVD). The channels used in the computer simulation are AWGN (Additive White Gaussian Noise), flat and frequency selective fading. Quaternary turbo coding associated with OFDM has shown to be a good alternative to inner encoding for the Brazilian digital TV standard

ASSUNTO(S)

codigos de controle de erros (teoria da informação) error-correcting codes (information theory)

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