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Title: Optimal antenna selection based on capacity maximization for MIMO systems in correlated channels
Authors: Dai, Lin
Sfar, Sana
Letaief, K. B.
Keywords: Correlated channels
Antenna selection
MIMO systems
Channel capacity
Singular value decomposition
Issue Date: 2005
Citation: Submitted toIEEE Transactions on Communications
Abstract: Recent work has shown that multiple-input multiple-output (MIMO) systems with multiple antennas at both the transmitter and receiver are able to achieve great capacity improvement. In such systems, it is desirable to select a subset of the available antennas so as to reduce the number of RF chains. This paper addresses the problem of optimal antenna selection in correlated channels. We consider a narrow-band communication system with M transmit and N receive antennas. We present the criterion for selecting the optimal Lt out of M transmit and Lr out of N receive antennas in terms of capacity maximization, assuming that only the long-term channel statistics, instead of the instantaneous channel state information, are known. Simulations will be used to validate our theoretical analysis and demonstrate that the number of required RF chains can be significantly decreased using our proposed selection strategy while achieving even better performance than the conventional MIMO system without antenna selection.
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