Propagation path loss models for mobile communication

Signal propagation and path losses are the key elements of wireless network design. This paper describes tuning process of empirical propagation path loss models for typical environments (urban, suburban, open areas). The Hata based models were compared with data measured in Brno. Model corrections were suggested and tested for GSM frequency band. The correction is aimed on the short range propagation in cellular networks. For model fitting to the measured data and for a deviation error estimation was used the mean square error (MSE). The tuned propagation model was used for localization in cellular network using particle swarm optimization (PSO) technique and geometrical technique.