A new diffraction method that yields realistic simulations of the mobile channel in built-up areas is presented. The new model, using UTD-based edge equivalent currents, allows for integrating the finite dimension of building wedges in the field estimation, A comparison with 1.6GHz experimental data shows good agreement in terms of level-crossing rate, in contrast to results obtained with the basic UTD.
Oestges, C., & Vanhoenacker-Janvier, D. (2001). Infinitesimal diffraction model for mobile wireless communication systems. Electronics Letters, 37(13), 856-858. https://doi.org/10.1049/el:20010550 (Original work published 2001)