Improvising the performance of shadowing effects in urban terrains using empirical models

As degradation of signal issue become critical in today´s communication medium. So prediction of correct path loss is important for GSM radio network planning to estimate network interference level and cell planning deployment accurately. GSM (Global System Mobile Communications) signal throughput and coverage range is one of the most important factors that will impair the quality of broadband wireless systems [2]. The study focused on shadowing effect in urban (combination of green vegetation and high raised buildings) terrains for propagation characteristics of GSM systems. A GSM frequency 950 MHz used for this experiment in a typical urban terrains. The measurement results compared with Cost-walfisch Ikegami model, Okumura Hata model and Bertoni-walfisch model. Finally, the results show that Bertoni model is better for predicting the path loss in tall buildings. The results are obtained using MatLab simulation software.