Open Access

On the Channel Capacity of Multiantenna Systems with Nakagami Fading

EURASIP Journal on Advances in Signal Processing20062006:039436

Received: 12 September 2005

Accepted: 9 March 2006

Published: 7 May 2006


We discuss the channel capacity of multiantenna systems with the Nakagami fading channel. Analytic expressions for the ergodic channel capacity or its lower bound are given for SISO, SIMO, and MISO cases. Formulae for the outage probability of the capacity are presented. It is shown that the channel capacity could be increased logarithmically with the number of receive antennas for SIMO case; while employing 3–5 transmit antennas (irrespective of all other parameters considered herein) can approach the best advantage of the multiple transmit antenna systems as far as channel capacity is concerned for MISO case. We have shown that for a given SNR, the outage probability decreases considerably with the number of receive antennas for SIMO case, while for MISO case, the upper bound of the outage probability decreases with the number of transmit antennas when the transmission rate is lower than some value, but increases instead when the transmission rate is higher than another value. A critical transmission rate is identified.


Authors’ Affiliations

Department of Electronic and Computer Engineering, University of Limerick
Department of Communication Systems, Faculty of Electrical Engineering, University Duisburg-Essen


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© F. Zheng and T. Kaiser 2006

This article is published under license to BioMed Central Ltd. 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.