Assessment of the real public exposure to base stations over a day from instantaneous measurement

espanolEn este trabajo se investiga la evaluacion de la exposicion publica diaria real a las senales emitidas por las antenas de las estaciones base de telefonia celular a partir de una medicion instantanea realizada en cualquier momento durante el dia. Las senales de RF consideradas son las de campo lejano de los enlaces descendientes GSM850 y GSM1900 de las comunicaciones moviles en un lugar exterior fijo en un medio urbano. Se analizaron dos canales de trafico: Ch133 (870.2 MHz), correspondiente a la GSM850 y Ch674 (1962.6 MHz) correspondiente a la GSM1900. Se propuso un modelo matematico basado en el valor medio Ē(t) y la desviacion estandar σE (t)de la intensidad del campo electrico instantanea E(t) para predecir la maxima exposicion diaria al campo electrico Emax para una semana a partir de una medicion instantanea. Los resultados de la evaluacion de la maxima exposicion al campo electrico usando este metodo fueron comparados con los obtenidos usando otro metodo propuesto recientemente por otros autores y se demostro que ellos pueden ser mas realistas. EnglishThe assessment of the real public exposure to signals emitted by base station antennas of mobile telephony over a day from an instantaneous measurementperformed any time during the day is investigated. The considered RF field sources were the mobile communication GSM850 and GSM1900 downlink far-field signals received in an outdoor fixed site in an urban environment. Two traffic channels were analyzed: Ch133 (870.2 MHz), corresponding to the GSM850 and Ch674 (1962.6 MHz), corresponding to the GSM1900. A mathematical model, based on the mean value Ē(t) and the standard deviation σE (t) of the instantaneous electric field intensity E(t), was proposed for predicting the maximum electric field exposure Emax over a day for a week starting from an instantaneous measurement. The results of assessment of the maximum electric field exposure using this method were compared with those obtained using another method recently proposed by other authors, and it was shown that they can be more realistic.