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Path loss models are the most fundamental part of wireless propagation channel models. Path loss is typically modelled as a (single-slope or multi-slope) power-law dependency on distance plus a log-normally distributed shadowing attenuation. Determination of the parameters of this model is usually done by fitting the model to results from measurements or ray tracing. The authors show that the typical...
The path loss model describing the power-law dependency on distance plus a log-normally distributed shadowing attenuation, is a staple of link budgets and system simulations. Determination of the parameters of this model is usually done from measurements and ray tracing. We show that the typical least-square fitting to those data points is inherently biased to give the best fitting to the link distances...
This paper consider a fundamental issue of pathloss modeling in urban environments, namely the spatial consistency of the model as the mobile station (MS) moves along a trajectory through street canyons. We show that the traditional model of power law pathloss plus lognormally distributed variations can provide misleading results that can have serious implications for system simulations. Rather, the...
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