Bulg. J. Phys. vol.44 no.2 (2017), pp. 145-154

Optimization of Path Loss Models Based on Signal Level Measurements in 4G LTE Network in Sofia

Ph. Atanasov, Zh. Kiss'ovski
Faculty of Physics, University of Sofia, 5 James Bourchier Blvd., BG-1164 Sofia, Bulgaria
Abstract. In this paper we present results of code-selective measurements of the signal level in LTE network in Sofia. The investigated area is characterized by large buildings and park with trees. The power level of received reference signal in the selected area is measured by Narda SRM~3006. The path loss dependence on the distance between eNodeB and measurement equipment is obtained in this area. The measurement results are used to optimize of empirical models for correct prediction of the path loss in LTE network in Sofia. Comparison of the results obtained by empirical models before and after tuning is made. The optimized models are characterized by reduced RMS error, thereby increasing the accuracy of estimation of path loss in the investigated area in Sofia.

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