Rooftop to Street Radio Propagation Analysis on GSM 1800 Frequency Spectrum

The non-uniformity of the road-to-building distance results variations on mobile user signal strength on the road. Signal diffraction of the rooftop to street results signal disappearance in some areas as the path losses is tremendous. Predicting impact rooftop to street impact to path loss is an important part of planning a mobile base station installation in rooftop. Adjusted propagation model can be useful for this purpose. This work examines rooftop to street propagation loss by using Okumura-Hata, Lee, Ericsson9999, and Stanford University Interim (SUI) models. This research is divided into 11 measurement routes in the observed base station location. Based on the measurement analysis, SUI propagation model is much closer to measured loss with root mean square error of 25.7 dB. The highest correction is about 28.3 dB in route 6 with an average rooftop to street distance of 6.68 m.