Indoor power measurements

Students: Irene Mpasiaka – Kiriaki Tsirivakou

Supervisors: George TsoulosDimitra Zarbouti

Complete in: 2012

Abstract

In this thesis extensive power measurements were held in the first floor of the Science and Technology Faculty building. The thesis goal was to determine a convenient indoor path loss prediction model for this building area and to investigate its accuracy.

The layout of the first floor is depicted in the following picture.

Basiaka_Tsirivakoy-layout

The transmitter was fixed at A (inside the lab) and the receiver was moving along the corridor and the elevators area. Five separeted areas can be distinguished judging by the floor layout. Area 1 is inside the lab where the propagation is LOS, area 2 concerns the right part of the corridor, area 3 the left part of the corridor, 4 and 5 are the two elevator areas. Different path loss models were derived for each area.

In the table that follows the measurements parameters are summarized.

The mobile receiver was placed at discrete measurements locations 0.5m away.

Indicative results can be found in the next figures, where the path loss measurements and the distance-depending models that derived by linear fitting for areas 2 and 3 are shown. The path loss coefficient was 1.1, indicating the waveguide effect of the corridor area. Moreover, the model for area 2 is far more accurate than that for area 3 (smaller mse). This is because the corridor at the right is longer and hence it provides a better estimation of the the propagation waveguide effect.