Research On Scattering Propagation Models For 5G At 28 GHz For A Rough Rectangular Surface

Compared to the relatively lower frequency in LTE/4G and before,the 5G propagation path loss model in the centimeter and millimeter wave presents much higher complexity as considering the tiny effects of any obstacles become more significant to the path loss budget.This thesis offers an improved version of the Bistatic Radar Equation at 28 GHz to cope with the scattering effect of a rough rectangular surface.The simplicity does not make the equation unacceptable.The simulation scenario is as pair as Huawei's simulations where the 28 GHz incident wave impinge a rough rectangular surface composed of 10 m × 5 m 400 small rectangular tiles.It takes account of the surface characteristics such as the dielectric constant and the surface roughness.The antenna locations are also important variables in this simulation for generality.The key point of this paper is to design the Radar Cross Section of the Bistatic Radar Equation modified using some correction factors after an empirical measurements have been obtained in Huawei.As a result,only 2 dBm overall error is observed when only specular scattering is considered.In the worst case,when diffuse scattering occurs,the upper bound overall error is no more than 10 dBm across the whole rectangular surface.The performance in the proposed scattering model shows close compliance with the reference results under its validity region.