Hata-Okumura Model Computer Analysis for Path Loss Determination at 900MHz for Maiduguri, Nigeria

摘要

Empirical propagation models are used extensively for coverage prediction during the design and planning of wireless networks. Some of the most widely used empirical models include the COST 231 Hata Model (COST 231 1999, Saunders 2000, COST 231 revision 2), COST 231-Walfisch-Ikegami Model (COST 231 1999), etc. These models, however, are not universally applicable due differences in terrain clutter. Thus, when planning a wireless communication network it is necessary to determine radio propagation characteristics optimal to the terrain in question. In this paper, the applicability of the COST 231 Hata Model to the metropolis of Maiduguri, Nigeria, is tested by computing variations between the COST 231 Hata predictions and predictions based on the Least Squares function, being the best fit curve through measured data points. This was achieved with the help of a software system comprising of Visual Basic as Front End and Microsoft Excel as Back End. The Root Mean Square Error (RMSE) was found to be 5.33dB, which is acceptable, the acceptable maximum being 6dB. Further statistical proof testifies to the acceptability of the COST 231 Hata Model for path loss prediction across the metropolis of Maiduguri, Nigeria.