%0 Journal Article %T Modelo del desvanecimiento selectivo en frecuencia %A Pedraza %A Luis %A Hern¨˘ndez %A Cesar %A Ballesteros %A Dora Mar¨Şa %J Revista Facultad de Ingenier¨Şa Universidad de Antioquia %D 2011 %I Scientific Electronic Library Online %X 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). %K fading %K orthogonal frequency division multiplexing %K diversity %K equalization %K cognitive radio. %U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-62302011000200012&lng=en&nrm=iso&tlng=en