Transmitter and Precoding Order Optimization for Nonlinear Downlink Beamforming
<|reference_start|>Transmitter and Precoding Order Optimization for Nonlinear Downlink Beamforming: The downlink of a multiple-input multiple output (MIMO) broadcast channel (BC) is considered, where each receiver is equipped with a single antenna and the transmitter performs nonlinear Dirty-Paper Coding (DPC). We present an efficient algorithm that finds the optimum transmit filters and power allocation as well as the optimum precoding order(s) possibly affording time-sharing between individual DPC orders. Subsequently necessary and sufficient conditions for the optimality of an arbitrary precoding order are derived. Based on these we propose a suboptimal algorithm showing excellent performance and having low complexity.<|reference_end|>
@article{michel2007transmitter,
    title={Transmitter and Precoding Order Optimization for Nonlinear Downlink
  Beamforming},
    author={Thomas Michel, Gerhard Wunder},
    journal={arXiv preprint arXiv:cs/0702122},
    year={2007},
    archivePrefix={arXiv},
    eprint={cs/0702122},
    primaryClass={cs.IT math.IT}
}