Optimal beamforming with combined channel and path CSIT for multi-cell multi-user MIMO

  title={Optimal beamforming with combined channel and path CSIT for multi-cell multi-user MIMO},
  author={Wassim Tabikh and Dirk T. M. Slock and Yi Yuan-Wu},
  journal={2016 Information Theory and Applications Workshop (ITA)},
We consider a combined form of partial CSIT (Channel State Information at the Transmitter(s) (Tx)), comprising both channel estimates (mean CSIT) and covariance CSIT. In particular multipath induced structured low rank covariances are considered that arise in Massive MIMO and mmWave settings. For the beamforming optimization, we first revisit Weighted Sum Rate (WSR) maximization with perfect CSIT and introduce yet another equivalent approach: Weighted Sum Unbiased MSE (WSUMSE). We then turn to… 

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