Author(s)

Farhan Khalid, Joachim Speidel

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This paper provides a comprehensive overview of critical developments in the field of multiple-input multiple-output (MIMO) wireless communication systems. The state of the art in single-user MIMO (SU-MIMO) and multiuser MIMO (MU-MIMO) communications is presented, highlighting the key aspects of these technologies. Both open-loop and closed-loop SU-MIMO systems are discussed in this paper with particular emphasis on the data rate maximization aspect of MIMO. A detailed review of various MU-MIMO uplink and downlink techniques then follows, clarifying the underlying concepts and emphasizing the importance of MU-MIMO in cellular communication systems. This paper also touches upon the topic of MU-MIMO capacity as well as the promising convex optimization approaches to MIMO system design.

Multiple-Input Multiple-Output (MIMO), Multiuser MIMO, Wireless Communications, Beamforming, Diversity, Precoding, Capacity

F. Khalid and J. Speidel, "Advances in MIMO Techniques for Mobile Communications—A Survey," International Journal of Communications, Network and System Sciences, Vol. 3 No. 3, 2010, pp. 213-252. doi: 10.4236/ijcns.2010.33031.