NEW UPPER AND LOWER BOUNDS LINE OF SIGHT PATH LOSS MODELS FOR MOBILE PROPAGATION IN BUILDINGS

Supachai Phaiboon (Electrical Engineering Department, Faculty of Engineering, Mahidol University Pisit)
P. Phokharatkul (Computer Engineering Department, Faculty of Engineering, Mahidol University)
Suripon Somkuarnpanit (Electronic Department, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang)

ASEAN Journal on Science and Technology for Development
Vol. 24 No. 4 (2007): ASEAN Journal on Science and Technology for Development (AJSTD)

This paper proposes a method to predict line-of-sight (LOS) path loss in buildings. We performed measurements in two different type of buildings at a frequency of 1.8 GHz and propose new upper and lower bounds path loss models which depend on max and min values of sample path loss data. This makes our models limit path loss within the boundary lines. The models include time-variant effects such as people moving and cars in parking areas with their influence on wave propagation that is very high.  The results have shown that the proposed models will be useful for the system and cell design of indoor wireless communication systems.