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Toward a reconfigurable MIMO downlink air interface and radio resource management: the SURFACE concept

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5 Author(s)
Kovacs, I.Z. ; Nokia Siemens Networks, Aalborg, Denmark ; Ordoez, L.G. ; Navarro, M. ; Calvo, E.
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This article presents a reconfigurable multiple-input multiple-output air interface design combined with radio resource management algorithms applicable to multi-user MIMO transmission in downlink orthogonal frequency-division multiple access systems. A low-complexity, adaptive, and channel-aware single-user and multi-user MIMO transmission solution is proposed based on the findings of the SURFACE European Commission funded research project. The resulting cross-layer design covers the reconfigurable air interface, and practical layer 1 and layer 2 RRM mechanisms for time-frequency packet scheduling. System-level performance analysis, including the effects of limited and imperfect feedback from the terminals, shows that the SURFACE air interface provides an attractive practical solution for operations with high-rate adaptive MIMO transmission schemes in the context of next-generation wireless communication systems.

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Communications Magazine, IEEE  (Volume:48 ,  Issue: 6 )