CDMA2000 Radio Measurements at 1.9GHz and Comparison of Propagation Models in Three Built-Up Cities of South-South, Nigeria.

Radio propagation measurements and prediction, realized by the mobile terminal or the base station, is needed to guarantee quality of service and to supervise the planned coverage area. A wide variety of approaches have been developed over the years to predict signal pathloss using what are known as propagation models. In this paper, we compare the measured pathloss obtained for the urban areas with seven existingpropagation models, that is, SUI, Lee, Hata, ECC and COST-231 W/I and W/B. Firstly, for both areas, the results show that the path loss is not constant at various locations for a constant distance around the respective base station (BS). This shows that the terrains of studied cities are irregular. Secondly, observations show that the W/B gives better agreement for all the studied three cities; hence, it can be used to model signal coverage area of cellular networks in any region of South-South Nigeria