On the Performance of Mobile WiMAX System: Measurement and Propagation Studies

Abstract

In this paper, we present drive test results for mobile WiMAX system for desert and cosmopolitan terrains where there are few studies reported in the literature. The extensive measurement is performed in the framework of the physical performance of the WiMAX technology which is often considered as a 4G system. Path loss model is fitted for the collected data. The work is unique in the sense that most empirical channel models are produced in regions where the environments (weather, buildings, vegetation, among others) are quite different from the desert terrains that are considered in this study. We also show that shadowing is truly lognormal in dB and the standard deviation values are calculated for the desert terrain from the measurement data. The measurements are collected using WiMAX BS station, with greenpacket dongle, and NEMO versatile outdoor drive test equipment to evaluate and characterize the performance of the system. The received signal strength indicators measured, are analyzed to complement network design and network optimization for regions where the popular models may not be accurate

Urban Area Path loss Propagation Prediction and Optimisation Using Hata Model at 800MHz

“…This approach is referred to as filtering the variations [19]. Table 3 below shows the results of the average path loss for each site.…”

“…Second, the RMSE function computation of this residual is calculated based on the least squared algorithm which is used to determine the values of γ that minimizes the residual RMSE. Thirdly, similar to the work by [18] and [19], the RMSE is then subtracted from the equation (13) of Hata model to obtain optimised path loss models for all BS sites in the location of study as given in equation (18). …”

“…The aim is to get the predicted field strength as close as possible to the measured field strength. Propagation path loss models optimized for different wireless technologies and environments are abundant in literature (e.g., [17]- [19]. …”