Comparative Analysis of Rain–Induced Attenuation Models Over Some Selected Nigerian Cities

Abstract

The fair investigation carried out on rain-induced attenuation at 12.245-GHz over three selected Nigerian cities was carried out in this study. For this work, a time series of rain-induced attenuation at the 12.45 GHz based on 1-minute-rain rate measurements was obtained for -LAUTECH-Ogbomosho, ESUT-Enugu, and FUGUS-Zamfara, respectively in the South West,South East and North Eastern Nigeria over a three-year period (2017–2020). The Received Signal Level (RSL) and rain intensity measurements were sampled at intervals of 10 seconds and integrated over a period of 1 minute. A performance analysis established on the collective allocation of rain rate along with the collective allocation of rain-induced attenuation gotten was reported and compared with some existing rain attenuation models (Garcia Lopez, SAM,Moupfouma and ITU-R models). Attenuation caused by rain as predicted based on the ITU-R and SAM resulted in a clear variation from the measured values by 14%, while the Moupfouma model provides a better fit to the actual attenuation data and then followed by the Garcia Lopez model.The results of this study may be used for planning similar links at the choice frequency band over the locations of interest.