Investigating the Visibility of 28 and 73 GHz Frequency Bands for Outdoor MIMO Channel

Abstract

As the world moves toward 5G networks, the wireless spectrum below 6 GHz will not meet future 5G network needs. Several new bands need to be investigated to check their characteristics and usability for future networks. In this paper, the investigation of outdoor performance of Multiple Input Multiple Output (MIMO) systems for 28 GHz and 73 GHz frequency bands is explored. A realistic scenario based on Statistical Spatial Channel Model (SSCM) over frequency selective Rayleigh fading channel is used in simulating MIMO channel. The channel performance is predicted for different propagation scenario, different combination of MIMO transmitter and receiver antennas and different antenna separation distances. Many parameters are computed, analyzed and compared to examine the MIMO performance for these frequencies. This includes the channel path loss, the received power, directional and Omni-directional Power Delay Profile (PDP), Angle of departure (AoD) and Angle of Arrival (AoA) power spectrum. The investigation of 28 GHz and 73 GHz frequencies is helpful in revealing the main features of the new frequency bands, their mmWave system-wide behavior, their maximum coverage distance as well as their usage visibility. The investigated frequencies are expected to be used in the first deployment of the 5G networks.