INFLUENCE OF TERRAIN ON MULTIPATH PROPAGATION OF FM SIGNAL

Ján Klima - Marián Možucha

   FM signal propagating through the troposphere interacts with the terrain as a reflecting plane. These reflected signals are not included into calculations and predictions of the field strength. The reason is simple - it is too difficult for processing, and demanding high quality data. For recent capabilities of computers and resolution level of digital terrain models this is not an irresolvable problem. In the report the authors show a practical demonstration how to include the reflected FM signals into the field strength calculations as well as the comparison with standard methods of field strength predictions.

Keywords: digital terrain model (DTM), reflections, diffraction, multipath propagation

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