Well,
radio wave propagation is a complex process, it is impossible to precisely
predict. Use of radio frequency bands of the electromagnetic spectrums is
regulated by governments of the in most countries.
In the
spectrum management process it is also known as frequency or spectrum
allocation. Giving the technical and electronic reason government has to sought
out the digital map RF planning. Radio wave propagation is a
very complex process. It is impossible to precisely predict how waves will
spread and what values we will measure at some particular point. Therefore we
have some mathematical models to approximate radio propagation and to calculate
field strength values according to predefined probability.
The propagation model, which is based
on electromagnetic theory and on statistical analysis of both digital map features and radio
measurements, predicts the median attenuation of the radio signal as a function
of distance and the variability of the signal in time and in space. Propagation
models define curves and formulas. With such model we can predict propagation
in arbitrary distance from the transmitter. Curves and mathematical formulas
manually is a very tough task. In order to automate and speed up such
calculations many software tools were developed. Normally, radio 3d digital model software packages are
used by broadcasters, mobile operators and radio frequency authorities. Because
of complexity and small number of potential customers, the price of such
software package can be pretty high. But there is one exception to this rule.
The author has decided to publish it
under the "freeware" license which means that the software is freely
available on the web. This software is primarily dedicated to amateur radio;
however, it can be also used in other areas including broadcasting and
professional mobile communications.
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