3D Modeling and Analysis of the Space–Time Correlation for 5G Millimeter Wave MIMO Channels
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The deployment of millimeter waves (mmW) in 5G mobile networks is considered as a challenging issue due to the lack of knowledge regarding the propagation of mmW in such multipath fading environments. Therefore, the analysis and modeling of such mobile fading channels is required. In this paper, we investigate the space–time correlation functions for multiple-input multiple-output (MIMO) channels in mmW frequency bands. We develop a 3-D geometry-based channel model for Rician channel to overcome the multipath fading. Such a model is able to provide a realistic channel propagation with multiple antenna elements surrounded by a scattering environment. We derive the space–time correlation functions for the scattering environments in terms of the different system parameters of the MIMO fading channel. We present the numerical evaluations to study the influence of the system parameters such as normalized time delay, vertical and horizontal antenna polarization, and separation between antenna elements on the performance of the space–time correlation functions.
Keywords5G millimeter-wave communication Channel modeling Multipath fading MIMO Space–time correlation functions
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