Energy efficiency-spectral efficiency trade-off of transmit antenna selection

Rayel, O. K., Brante, G., Rebelatto, J. L., Souza, R. D. and Imran, M. A. (2014) Energy efficiency-spectral efficiency trade-off of transmit antenna selection. IEEE Transactions on Communications, 62(12), pp. 4293-4303. (doi:10.1109/TCOMM.2014.2364040)

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Abstract

We investigate the energy efficiency-spectral efficiency (EE-SE) trade-off of transmit antenna selection/maximum ratio combining (TAS) scheme. A realistic power consumption model (PCM) is considered, and it is shown that using TAS can provide significant energy savings when compared to multiple-input multiple-output (MIMO) in the low to medium SE region, regardless the number of antennas, as well as outperform transmit beamforming scheme (MRT) for the entire SE range. For a fixed number of receive antennas, our results also show that the EE gain of TAS over MIMO becomes even greater as the number of transmit antennas increases. The optimal value of SE that maximizes the EE is obtained analytically, and confirmed by numerical results. Moreover, the influence of receiver correlation is also evaluated and it is shown that considering a non-realistic PCM can lead to mistakes when comparing TAS and MIMO.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Rayel, O. K., Brante, G., Rebelatto, J. L., Souza, R. D., and Imran, M. A.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IEEE Transactions on Communications
Publisher:IEEE
ISSN:0090-6778
Copyright Holders:Copyright © 2014 IEEE
First Published:First published in IEEE Transactions on Communications 62(12): 4293-4303
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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