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Home  >  Volume 26 (March 2014)

49. Statistical Modification of Hata Model for Pathloss Prediction in the Coastal City of Warri, Nigeria by Ogbeide O.K and Ojo J. S. Volume26, (March, 2014), pp 369 – 374.
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The aim of this study is to test the performance of the Hata model for pathloss prediction in the  coastal city of Warri, Delta state Nigeria. In this study, the applicability of the Hata model is tested by comparing the Hata predicted pathloss with the measured pathloss. Pathloss models are important tools as they are useful in estimating radio propagation coverage during radio system planning. The Hata model was used due to its simplicity and reliability. A quantitative signal strength measurement was carried out using the Delta Broadcasting Service (DBS) Station operating at the ultra high frequency band (UHF) at a frequency of 636MHz. The results showed that the Hata model in its original form did not predict the pathloss as depicted by the terrain of Warri. This was observed using the performance metric of the Root Mean square error (RMSE) value. The computed RMSE value was found to be 24.62dB which is outside the accepted range for pathloss prediction models. Statistically modifying the original Hata model yielded a modified Hata model which gave a lower and acceptable root mean square error of 3.96dB accepted for pathloss prediction. The modified equation was validated using data obtained from measurements in another location in  the city of Warri.

Keywords:Path loss, Hata model, rmse, prediction