In the present study, the performance of Over-Roof-Top (ORT) propagation models in dense urban environment is investigated. Based on a standard model for multiple knife-edge diffraction, several modifications aiming at improving its prediction capability are checked vs. measurements performed in the city of San Francisco in strongly non-line-of-sight (NLOS) locations where ORT is expected to be the dominant propagation mechanism. Results show that the standard ORT model generally overestimates attenuation, while a mean prediction error close to 0 dB and an error standard deviation of about 10 dB can be achieved including some modifications, even without modeling propagation off the vertical plane.
A study on the performance of over-roof-top propagation models in dense urban environment
Vitucci, E. M.
;Fuschini, F.;Barbiroli, M.;Zoli, M.;Degli-Esposti, V.
2018
Abstract
In the present study, the performance of Over-Roof-Top (ORT) propagation models in dense urban environment is investigated. Based on a standard model for multiple knife-edge diffraction, several modifications aiming at improving its prediction capability are checked vs. measurements performed in the city of San Francisco in strongly non-line-of-sight (NLOS) locations where ORT is expected to be the dominant propagation mechanism. Results show that the standard ORT model generally overestimates attenuation, while a mean prediction error close to 0 dB and an error standard deviation of about 10 dB can be achieved including some modifications, even without modeling propagation off the vertical plane.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
