Modelling of path loss coefficient and loss due to roof for a indoor Wi-Fi system

Nowadays, every one want to use cell phone and access internet from anywhere at home, office or public place due to rapid growth of Electronic and Telecommunication industry. Due to these demands the analysis of signal propagation inside and outside building is necessary. The outdoor propagation is simple as compared to indoor propagation. This paper models the path loss coefficient and general expression for loss due to roof for an indoor Wi-Fi system (Wi-Fi= Wireless Fidelity). It was concluded that the path loss coefficient depends on the objects inside the room and loss due to roof depends on the roof thickness.