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Previous issue date: 2012-08-31 === This Master Thesis presents a novel equalization technique for single-carrier frequency domain multiple access (SC-FDMA) systems based on Concurrent Algorithm (which is considered the state of art in terms of channel equalization). The SC-FDMA transmitter and receiver models have been described in SystemC for simulation, where the equalization method is reconfigurable in the receiver in order to compare multiple techniques. The channel degradation effects have been simulated using MATLAB?, considering the Rayleigh model with Doppler dispersion following the classical Jakes spectrum, where the power delay profiles indicated by 3GPP for the LTE performance tests have been adopted (EPA5, EVA5, EVA70, ETU70 and ETU300). The simulation results prove that the use of the novel technique, mainly when combined with other ones already applied in this kind of system, e.g. linear interpolation, improve substantially the channel deconvolution process. The concurrent equalizer which has been proposed was able to perform the deconvolution on all of tested channels. === Este trabalho apresenta uma nova t?cnica de equaliza??o de canal para sistemas monoportadora com acesso m?ltiplo por divis?o de frequ?ncia (SC-FDMA) baseada no Algoritmo Concorrente (que ? considerado o estado da arte em termos de equaliza??o de canal). Os modelos de um transmissor e de um receptor SC-FDMA foram descritos em SystemC para simula??o, onde no modelo do receptor o m?todo de equaliza??o ? reconfigur?vel a fim de comparar com diferentes t?cnicas. Os efeitos de degrada??o do canal de transmiss?o foram simulados em MATLAB? considerando o modelo Rayleigh com dispers?o Doppler seguindo o cl?ssico espectro de Jakes, onde foram adotados os perfis de atraso de pot?ncia indicados pela 3GPP para testes de desempenho do sistema LTE (EPA5, EVA5, EVA70, ETU70 e ETU300). Os resultados da simula??o comprovam que a utiliza??o da nova t?cnica, principalmente quando aliada a outras j? aplicadas nesse tipo de sistema, e.g. interpola??o linear, melhora consideravelmente o processo de desconvolu??o de canal. O equalizador concorrente proposto foi capaz de realizar a desconvolu??o de todos os canais testados.
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