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We derive an analytical space-time fading correlation for the MIMO channel as a function of antenna spacing, angle spread, and Doppler spread. We investigate the performance of uplink spatial fading correlation of the MIMO channel. We consider four uniform circular array (UCA) elements at both the mobile station (MS) and the base station (BS). The angle of arrival (AOA), and the angle of departure (AOD), at the BS and the MS is distributed by a truncated Gaussian PDF and uniform PDF, respectively. We also compare the analytical results with the simulation results. For large values of N, the simulation and analytical results agree.