Absolute Heights
Calculate propagation in rural/suburban scenario with the site height set relative to sea level.
Model Type
The geometry is described by topography (elevation) and is shown in Figure 1. The
Database tree in the Tree view enables you to view the
topography (terrain elevation at every pixel). In this example, there is no
land-usage (clutter) database. The prediction area (red rectangle) is smaller than
the total available area and as a result, reduces computation time.
Tip: Click and click the Simulation tab to set the
prediction area.
Sites and Antennas
The model contains a site with one omnidirectional antenna. The antenna is placed at
an absolute height of 273 m, which is the height above sea level, and operates at a
frequency of 2 GHz. The transmitter power of the antenna is 10 W.
Tip: Click and click the Sites tab to view the
antennas and sites.
Computational Method
The selected method is DPM. Contrary to
several other methods for rural propagation, DPM is a 3D deterministic method. Propagation
exponents were too reasonable values for such a typical terrain where some of the
power is scattered by vegetation or other terrain features. Often these exponents
are fine-tuned using calibration based on a few measurements for a given
environment.
Tip: Click and click the Computation tab to set the
Path Loss Exponents.
Results
Propagation results show in every location the received power by a hypothetical omnidirectional receiving antenna at 1.5 m above ground. For example, Figure 2 shows the results for Site 1 Antenna 1.
A line-of-sight analysis was performed and is shown in Figure 3.
