Abstract
This work provides a comprehensive scaling law based performance analysis for single-cell multi-user massive multiple-input-multiple-output (MIMO) downlink systems with maximal-ratio transmission (MRT). Channel state information (CSI) error and channel spatial correlation are both considered. First, a sum-rate lower bound is derived by using Jensen's inequality and the asymptotically deterministic property of the received signal power. Via a general scaling model on the number of users, the CSI quality and the data transmission power, with respect to the number of base station (BS) antennas, the asymptotic performance scaling law is obtained, which reveals quantitatively the tradeoff of the above three parameters. In addition, the applicability of the derived asymptotic scaling law in practical systems with not-so-large antenna numbers is discussed. Finally, all analytical results are evaluated through simulations.
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