Abstract

Multi-user MIMO (MU-MIMO) networks reveal the unique opportunities arising from a joint optimization of antenna combining techniques with resource allocation protocols. Furthermore, it brings robustness with respect to multipath richness, allowing for compact antenna spacing at the BS and, crucially, yielding the diversity and multiplexing gains without the need for multiple antenna user terminals. To realize these gains, however, the BS should be informed with the user's channel coefficients, which may limit practical application to TDD or low-mobility settings. To circumvent this problem and reduce feedback load, combining MU-MIMO with opportunistic scheduling seems a promising direction. The success for this type of scheduler is strongly traffic and QoS-dependent, however.

Keywords

MIMOComputer scienceSpatial multiplexingMultiplexing3G MIMORobustness (evolution)Multipath propagationMulti-user MIMOScheduling (production processes)Computer networkElectronic engineeringChannel (broadcasting)TelecommunicationsEngineeringMathematical optimizationMathematics

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Publication Info

Year
2007
Type
article
Volume
24
Issue
5
Pages
36-46
Citations
1066
Access
Closed

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Cite This

David Gesbert, Marios Kountouris, Robert W. Heath et al. (2007). Shifting the MIMO Paradigm. IEEE Signal Processing Magazine , 24 (5) , 36-46. https://doi.org/10.1109/msp.2007.904815

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DOI
10.1109/msp.2007.904815

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