A deterministic outdoor to indoor propagation modelling approach

A modelling approach is presented, based on a modified form of the Fresnel diffraction integral. The approach combines contributions through different building elements and interfaces, e.g. windows, walls and doors, in order to calculate the overall signal contributed to a certain point inside a building. The method could be used to investigate coverage and interference issues when overlaying line of site microcells with in-building picocells or similar scenarios where there is a line of site with the building of interest. Two different cases are considered depending on the receiver position within the building. The first case refers to a receiver position in the first room next to the external wall, while the second case to a position anywhere else in the building. The predicted results are compared with a set of measured data recorded in 3 different UK cities.