Nonlinear Downlink Beamforming Under QOS Constraints: Optimum Precoding Order and the Need for Time-Sharing

We consider the downlink of a multi-antenna system where the transmitter performs nonlinear dirty-paper coding (DPC) and each receiver is equipped with a single antenna. Assuming that the base station must support a certain quality of service (QoS) for each user, we analyze the minimum power transmit strategy consisting of filters, power allocation and… CONTINUE READING