Outdoor Radio Simulation

Published 12 May 2006 by Alberto Escudero Pascual

bulletDownload: mmtk_wireless_radio-simulation_handout.pdf

Outdoor Radio Simulation - A training unit for the Community Wireless Connectivity Training Initiative in Africa, sponsored by IDRC.

This unit serves as an introduction to the software “Radio Mobile”, a radio simulation tool for outdoor environments. By simulating your wireless deployment, you will be able to evaluate the viability of a network architecture (topology) and estimate the number of nodes needed to cover a certain area.

Radio Mobile is a software tool written by Roger Coudé (VE2DBE) that it is used to predict the performance of outdoor radio systems. Although it was initially conceived for traditional amateur radio systems (voice and data communications in UHF and VHF), it allows calculations of link budgets in a wide frequency range.

Radio Mobile uses the information from terrain elevation data (digital maps) to automatically compute the path profile between an emitter and a receiver.

The software uses the ITM (Irregular Terrain Model) for radio propagation. The ITM or Longley-Rice Model (1968) is a general purpose model based on electromagnetic theory and statistical analysis of terrain features. Radio Mobile implements ITM and because the model is valid in the range of 20 Mhz to 20 Ghz, the software can be used to predict the median attenuation of radio signals in WLAN and WMAN systems.

Radio Mobile does not only calculates link budgets but can produce a variety of virtual maps, 3D views, stereoscopic views, and even animations. Unfortunately, for legal reasons the maps need to be downloaded at least “once” from the Internet as its relies on external sources for cartography.

Keyword(s): Radio Mobile,