Low Complexity Delay-Constrained Beamforming for Multi-User MIMO Systems With Imperfect CSIT

@article{Lau2013LowCD,
  title={Low Complexity Delay-Constrained Beamforming for Multi-User MIMO Systems With Imperfect CSIT},
  author={Vincent K. N. Lau and Fan Zhang and Ying Cui},
  journal={IEEE Transactions on Signal Processing},
  year={2013},
  volume={61},
  pages={4090-4099}
}
We consider the delay-constrained beamforming control for downlink multi-user MIMO (MU-MIMO) systems with imperfect channel state information at the transmitter (CSIT). The delay-constrained control problem is formulated as an infinite horizon average cost partially observed Markov decision process. To deal with the curse of dimensionality, we introduce a virtual continuous time system and derive a closed-form approximate value function using perturbation analysis w.r.t. the CSIT errors. To… CONTINUE READING
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