… To that end, an ellipsoid approach was adopted to capture the … resources to satisfy rarely
occurring worst-case events. … the channel reciprocity of the downlink and uplink channels.…

… timate as the center of an ellipsoid in a multidimensional complex space … We use a worstcase
robust precoding scheme as a … robust transmit optimization for multiuser MISO downlinks: …

… to construct robust beamformers that minimize the worst-case … different optimization criteria,
viz., minimization of the total downlink … This is termed as the ellipsoidal uncertainty model and …

… ellipsoid model for the reflection channel uncertainties is adopted. To the best of our knowledge,
this is the first work to study the worst-case robust … propose an alternate optimization (AO…

… uncertainties are bounded by predefined ellipsoids. Then, we consider the worst-case EE to
… and then use it to model the worst-case power optimization problem. After applying a set of …

… • We formulate a worst-case minimum SINR maximization … location error realizations for joint
optimization of the deployment … uncertainty set is appropriately described by an ellipsoid, ie, …

… , we formulate the robust SLP optimization problem as a second-… Under the ellipsoidal
uncertainty model, usually no … of the proposed robust design formulations based on the worst-case …

… through an optimization problem under the deterministic error … provide higher robust compared
to the worst-case design … which is the edge of the ellipsoid. This model has been widely …

… 2In this letter, we assume linear precoding at the BS and consider the worstcase … Robust
linear MIMO in the downlink: A worst-case optimization with ellipsoidal uncertainty regions…

… We consider an OFDM-based single-user MIMO downlink, … evaluate the robustness of P2
against channel uncertainty. … requirement is 45 dB—worst-case of measured ACLR in the …