A Radiance Model for Predicting Radio Wave Propagation in Irregular Dense Urban Areas

We present a deterministic model of radio wave propagation based on radiance transfers. Our model uses radiosity techniques to determine facet-to-facet specular reflections according to a 3D building description. The model contains two main components. First, visibility between elements is determined and used to establish links that represent radiance transfers that include diffraction and free space losses based on geometric approximations. Secondly, links are used to define a transfer equation whose solution provides the transfer intereflections. The solution is obtained by using hierarchical radiosity. The results of the model show a good agreement with measurements made in urban areas. in ria -0 05 10 17 3, v er si on 2 11 J an 2 01 1 Author manuscript, published in "IEEE Transactions on Antennas and Propagation 51, 11 (2003) 30973108"