Multiple Heights

Compute path and transmission losses on three different prediction planes.

Model Type

The propagation project is for an indoor scenario for a large multi-floor building. The simulation is done for three different prediction planes.

Sites and Antennas

There are three antenna sites at different locations in the office building for better coverage. The antennas are placed at different locations and on different floors but operate on the same carrier frequency of 948 MHz. All antennas are omnidirectional antennas and transmit 0.1 W of power.
  • Antenna 1 at Site 1 is located at a height of 2.5 m.
  • Antenna 2 at Site 2 is located at a height of 6.2 m.
  • Antenna 3 at Site 3 is located at a height of 9.9 m.
Tip: Click Project > Edit Project Parameter and click the Sites tab to view the sites and antennas.

Computational Method

The computational method used is the multi-wall model (COST 231). The multi-wall model considers the basic path losses plus transmission losses for the walls and floors given a straight path between the transmitter and receiver. This model has a low dependency on the database accuracy, and because of this simple approach, very short computation time is required. Therefore no preprocessing of the building data is needed for the computation of the prediction. No settings need to be adapted for this prediction model.

Tip: Click Project > Edit Project Parameter and click the Computation tab to change the model.

Results

Propagation results show, at every location, the power received from each transmitting antenna individually. The results for antenna 1 are shown for three prediction planes of height 1.5 m, 5.2 m, and 8.9 m. The received power is highest on the floor where the antenna is located due to the absence of transmission loss through different floors.

Figure 1. Power received from antenna 1 at a prediction height of 1.5 m.


Figure 2. Power received from antenna 1 at a prediction height of 5.2 m.


Figure 3. Power received from antenna 1 at a prediction height of 8.9 m.