MIMO CHANNEL TECHNOLOGY: BARRIERS TO ADOPTION IN 5G NETWORKS

Abstract

Abstract: Multiple Input Multiple Output (MIMO) method, well-suited for millimetre-wave (mm Wave) communications, enable the creation of extensive connexion channel arrays with practical form section for both outdoor and indoor environments. These systems can achieve reliable coverage in both scenarios, benefiting from the high gains provided by the arrays. However, implementing MIMO method in frequency division duplex (FDD) mode presents a significant challenge due to the substantial feedback overhead required for transmitting the channel state information (CSI) to the transmitter, which stems from the multiplexing algorithm employed. By 2020, the adoption of 5G technologies was anticipated to be widespread, making it essential to explore the integration of MIMO systems with orthogonal frequency division multiplexing (OFDM) revision in the 5G framework. This study focuses on the demand associated with deploying MIMO-OFDM in 5G discipline. Four distinct models are proposed, each featuring different number of transmitters and recipient antenna elements, with all models maintaining two elements per array in both the transmitter and recipient arrays. The models were evaluated under two environments:  Non-Line of Sight (NLOS), Line of Sight (LOS). Key mathematical indicators, including the transmission channel rate and the condition issue of the channel matrix, were employed to assess MIMO channel performance. The disorder number was derived from the outcome of the four models and analysed alongside the channel rank metrics to provide a comprehensive evaluation of MIMO channel technology.