Influence of atmospheric parameters on speech quality in GSM/UMTS

Abstract

The paper deals with a relation between atmospheric conditions and speech quality in GSM/UMTS networks. The results are based on more than 20 thousand measurements. Authors developed monitoring tool which carried out a call every five minutes and the transmitted calibrated speech samples were compared with the received by PESQ method, the computed MOS to every call was stored in database. The meteorological station, which was located in university campus provided information about a temperature, a humidity, a dew point, a rain, a wind speed and an atmospheric pressure. The aim of our research project was to investigate a correlation between the speech quality in GSM/UMTS and meteorological data. The measured data were analysed by K-means clustering method. We observed nearly a 50 percent decrease of MOS during a heavy rain. The paper describes the way of measurements and analysis of collected data.