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Sociedade Brasileira de Telecomunicações

Análise de Desempenho da Codificação Wavelet em Canais Seletivos em Frequência


Wavelet coding has emerged as an alternative coding technique to minimize the fading effects of wireless channels. Unlike classical coding techniques, in which the coding gain arises through the controlled addition of redundant information, the robustness achieved by wavelet encoding against the fading effects occurs due to a time diversity created over the transmitted information. So far, the performance of wavelet coding has been investigated only in communication channels subject to time-varying flat fading. This paper evaluates the performance of wavelet coding, in terms of bit error probability, over time-varying, frequency-selective multipath Rayleigh fading channels. Through computer simulation, this paper presents numerical results that demonstrate the effectiveness of this technique in combating inter-symbolic interference, characteristic of these communication scenarios.

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