Date Added: May 2011
A novel decentralized Coordinated MultiPoint (CoMP) technique facilitated by receiver feedback is proposed. If multiple Base Stations (BSs) access the same radio resource; downlink transmissions from one BS cause Co-Channel Interference (CCI) towards users served by neighboring BSs. To mitigate CCI in a Multiple-Input-Multiple-Output (MIMO) network, the Mobile Station (MS) scheduled in a tagged cell (i.e. the active user) emits a Busy Burst (BB) on a time multiplexed feedback slot, applying the precoder used earlier for receiving data. Prior to transmission a neighboring BS must scan the feedback slot using the spatial precoder(s) intended for data transmission. Consequently, in a Time Division Duplex (TDD) system the channels of the data and the feedback slots become reciprocal.