Propagation simulation for outdoor wireless communications in urban areas
Author(s)
Advisor
Altıntaş, AyhanDate
2002Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
A propagation simulation of wireless communication for urban environments is
aimed. Firstly, propagation path loss from a base station to a receiver point
was calculated according to Walfisch-Ikegami model which is an empirical model
based on the measurement data. Building database around the base station was
used to calculate the path losses. Outdoor regions between buildings were divided
into grid points and path losses are calculated as if there is a receiver at
a given grid point. For a given radiated power from the base station, received
power was obtained at each grid point. Visual output of the received power
distribution was plotted. Results were compared with the Walfisch-Ikegami implementation
of a commercial software called Winprop. Almost identical power
distribution was observed. Secondly, ray tracing model of Winprop was used for
the same area. Assuming ray tracing model gives more accurate results, situations
for which Walfisch-Ikegami model better approaches to ray tracing model
were found. Coherence bandwidth were obtained by using the impulse response
produced by the ray tracing model.
Keywords
propagation simulationpath loss
Walfisch-Ikegami model
ray tracing
coherence bandwidth
wireless systems