Abstract
The predominant direction in modern wireless mobile communication is to take advantage of using new spectrums in the Fifth Generation (5G) of mobile networks which planned to be started by 2020. These new spectrums can be provided through Millimeter Wave (mmW) bands which extended from 30 GHz to 300 GHz and have not been exploited before in the previous generations of mobile. This paper presents a closed form expressions for small scale fading space-time correlation function at mmW bands to get the appropriate antenna spacing in MIMO systems to be used in uncorrelated mmW 5G systems. First a geometry based three dimensional (3D) cylinder channel model has been built followed by its impulse response. Form the model the MIMO channel space-time correlation at different mmW bands has been extracted. The analytical model validity has been checked by comparing its results with that published earlier for the Third generation as a special case.
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