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|Title: ||Optimal antenna selection based on capacity maximization for MIMO systems in correlated channels|
|Authors: ||Dai, Lin|
Letaief, K. B.
|Keywords: ||Correlated channels|
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.|
|Appears in Collections:||CenWIT Preprints|
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