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Modelo del desvanecimiento selectivo en frecuenciaKeywords: fading, orthogonal frequency division multiplexing, diversity, equalization, cognitive radio. Abstract: in this paper a mathematical analysis of the frequency selective fading produced by multipath propagation is presented, as well as recent techniques to reduce the effects of this phenomenon as: the diversity of antennas, the rake receiver, the adaptive equalization and ofdm (orthogonal frequency division multiplexing).
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