Propagation channel characterization for 28 and 73 GHz millimeter-wave 5G frequency band

The recent advancement in the 5G wireless technologies is demanding higher bandwidth, which is a challenging task to fulfill with the existing frequency spectrum i.e. below 6 GHz. It forces operators and researchers to go for higher frequency millimeter-wave (mm-wave) spectrum in order to achieve greater bandwidth. Enabling mm-wave, however, will come with various path loss, scattering, fading, coverage limitation, penetration loss and various different signal attenuation issues. Optimizing the propagation path is much essential in order to identify the behavior of channel response of the wireless channel before it is implemented in the real-world scenario. In this paper, we have analyzed the potential ability of mm-wave frequency band such as 28 and 73 GHz and compare our results with the existing 2.14 GHz LTE-A frequency band. We utilize the most current potential Alpha Beta Gama (ABG) propagation path loss model for designing urban microcell line of sight (LOS) scenario. We investigate the network performance by estimating average user throughput, average cell throughput, cell-edge user's throughput, peak user throughput, spectral efficiency and fairness index with respect to different user's capacity. The results express the significant improvement in spectrum efficiency of up to 95% for 28 GHz and 180% for 73 GHz is achieved in comparison with 2.14 GHz. It results also show that the 28 and 73 GHz frequency band is able to deliver up to 80 and 170% of enormous improvement in average cell throughput respectively as compared to currently LTE-A frequency band.

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