%0 Journal Article %T EVALUACI¨®N DE ENLACES INAL¨¢MBRICOS URBANOS USANDO PROTOCOLO IEEE 802.11b %A Correa A %A Cristian %A Godoy S %A Rodrigo %A Grote H %A Walter %A Orellana F %A Manuel %J Revista Facultad de Ingenier¨ªa - Universidad de Tarapac¨¢ %D 2005 %I Scientific Electronic Library Online %R 10.4067/S0718-13372005000300006 %X in this publication a link loss prediction model for fixed outdoor urban wireless wifi communications using the 2.45 ghz frequency band based on the okumura-hata model is proposed. the model evaluates the expected path losses using a modified okumura¡¯s prediction model and eye inspection of the link to determine the degree of obstruction. results are checked against experimental data to find that in 90% of the studied links it is accurate within a 5 db margin. we also analyze the coherence time of these links by performing long term measurements of the received signal. %K link loss prediction model %K ieee 802.11b protocol %K channel coherence time. %U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0718-13372005000300006&lng=en&nrm=iso&tlng=en