Skip to content

The use of measurement data to analyse the performance of rooftop diffraction and foliage loss algorithms in a 3-D integrated urban/rural propagation model

Research output: Contribution to conferenceAbstract

Original languageEnglish
Pages303 - 307
StatePublished - May 1998


This paper describes a 3-D integrated propagation model, which considers propagation effects in both urban and rural environments. It uses a variable resolution digital terrain map (DTM) as well as building and foliage databases. Scattering off terrain pixels and building walls is modelled, as are off-axis terrain and rooftop diffraction contributions. The scattered power is estimated from radar cross-section analysis of the illuminated pixels and walls. The effects of foliage attenuation are also fully considered. The model predicts signal strength and time dispersion and provides fading and arrival angle information for the propagation channel. Narrowband measurements in both urban and rural areas show very good agreement with the predicted results. The accuracy of different foliage-loss and diffraction-loss models has been assessed, with the ITU-R foliage-loss model and the UTD model giving the best results. It is shown that large errors can result if the effects of foliage are ignored in the modelling process.

Additional information

Sponsorship: Much of the work described in this paper was carried out under the Virtual University Research Initiative (VURI) and funded by British Telecommunication Research Laboratories at Martlesham, UK. Terms of use: Copyright © 1998 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference, Spring 1998. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it. Name of Conference: 48th Vehicular Technology Conference 1998 (VTC 1998-Spring) Venue of Conference: Ottawa

Research areas

  • UHF radio propagation

Download statistics

No data available





View research connections

Related faculties, schools or groups