NLOS and LOS of the 28 GHz bands millimeter-wave in 5G cellular networks

5G cellular systems tend to operate at the centimeter-wave frequency band (3-30 GHz) or millimeter-wave frequency band (30 to 100 GHz). Line of Sight (LOS) is a direct line between the radio transmitter and receiver and many types of radio transmissions depend on it. Unfortunately, for arbitrary transmission networks, obstacles are commonly caused by non-line-of-sight (NLOS) conditions. This paper presents a comparison study of LOS and NLOS performance in the 28 GHz band for millimeter-Wave wireless networks, where a vast amount of underutilized bandwidth exists world-wide. This paper discusses the radio propagation mechanisms that impacts the performance of the network in the form of time delays, received power, azimut AoD, Evevation AoD, Azimut AoA, Elevation AoA, path-lost and RMS delay in LOS and NLOS environments.