Adaptive feedback rate control in MIMO broadcast systems with user scheduling

Zakhour, Randa;Gesbert, David
ITA 2008 Information Theory and Applications Workshop, January 28-30 2008, San Diego, USA

An adaptive scheme was introduced in view of optimizing the overall spectral efficiency of a multiuser MIMO wireless broadcast channel where the channel state information at the transmitting base station (CSIT), to be used for user scheduling and beamforming, is acquired over a limited-rate feedback channel. In this scheme, the feedback rate is no longer constant per scheduling period but rather optimized as a function of the time-dependent channel quality seen at the user side. The present paper further refines this idea and elaborates on some of the associated practical concerns.

Invited paper in a conference
San Diego
Systèmes de Communication
Eurecom Ref:
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