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International Journal of Antennas and Propagation
Volume 2014, Article ID 798015, 9 pages
http://dx.doi.org/10.1155/2014/798015
Research Article

An Analytical Study of the Impact of Arbitrary Receive Antenna Correlation in TAS/MRC

Department of Electronic Technology, E.T.S.I. of Telecommunication, University of Malaga, 29071 Malaga, Spain

Received 13 March 2014; Accepted 29 May 2014; Published 16 June 2014

Academic Editor: Theodoros Tsiftsis

Copyright © 2014 Juan P. Peña-Martín and Juan M. Romero-Jerez. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Novel closed-form expressions are derived for the performance analysis of a multiple-input multiple-output (MIMO) system in Rayleigh fading using transmit antenna selection (TAS) at the transmitter and maximal ratio combining (MRC) at the receiver. Receive antennas are assumed to be arbitrarily correlated, as no restriction is imposed on the correlation matrix. General exact and asymptotic expressions to evaluate the bit error rate (BER) of different modulation schemes are presented for uncoded transmission, and a closed-form expression is presented for the channel capacity. It is demonstrated that channel capacity may improve due to correlation at the receive antennas if the transmit array size is large enough as a result of a higher signal variability and the antenna selection performed at the transmitter. Monte Carlo simulations have been carried out to validate the analysis, showing an excellent agreement with the theoretical results.