Rural, DTR

Calculate propagation in a rural scenario using the deterministic two ray model (DTR).

Model Type

In this rural/suburban scenario, the geometry is described by topography (elevation) and clutter (land usage).

Sites and Antennas

The topography contains three sites, each with a sector antenna. Each antenna is mounted at a height of 25 m from the ground and transmits 10 W of power at a single carrier frequency of 2000 MHz.

Tip: Click Project > Edit Project Parameter and click the Sites tab to view the sites and antennas.

For example, the Sites tab shows you the number of antennas in each site, carriers (frequency) used, and height of sites.

Computational Method

The deterministic two ray model (DTR) model computes the direct ray and the ground reflected ray with ray optical algorithms. If a ray is shadowed by obstacles, it is not considered.

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

Figure 1 shows a prediction with the DTR method in a coastal area scenario. The received power is only predicted for pixels which can be reached by the direct ray and/or the ground reflected ray. All pixels in areas without line-of-sight to the transmitter are not predicted.

Results

Results are computed for each transmitter at a prediction plane of 1.5 m. Propagation results include power coverage of each transmitting antenna, field strength, and path loss for all three sites. An example is shown in Figure 2. White pixels are not computed because there is no line-of-sight between the transmitter and the pixel.