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It has been well recognized that Channel State Information (CSI) feedback is important for downlink transmissions of closed-loop wireless networks. In this paper, the authors investigate the CSI feedback rate control problem in the analytical setting of a game theoretic framework, where a multiple-antenna Base Station (BS) communicates with a number of co-channel Mobile Stations (MS) through a Minimum Mean Square Error (MMSE) precoder. Specifically, they present a Non-cooperative Feedback-rate Control game with Price (NFCP) over orthogonal feedback channels with a total bandwidth constraint. The game utility is defined as the performance gain by CSI feedback minus the price as a linear function of the CSI feedback rate, subject to an overall bandwidth constraint.
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