We consider the impact of receiver correlation, antenna coupling, matching, and noise on the performance of coordinatedbeamforming systems. We present a new coordinated beamforming technique for two receivers that is suitable for MIMO broadcastchannels with signal and noise correlation at the receiver. We then apply this technique to the specific type of signal and noisecorrelation that occurs in the presence of receiver mutual coupling. Numerical results suggest that, even in the presence of strongcoupling, most of the benefits of coordinated beamforming can be preserved by using appropriate matching networks and linearbeamforming. Moreover, these benefits can be achieved even when feedback is limited.
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