Downlink multicasting beamforming with imperfect CSI on both transceiver sides

This paper deals with the issue of robust beamforming design of multicast downlink system with bounded imperfect channel state information (CSI) on both transceiver sides. Two optimization objectives are considered: the minimization of transmit power that subject to the quality of service (QoS) constraints of all receivers; the maximization of worst case effective signal-to-interference-plus-noise ratio (eSINR) bounded by the transmit power. Both of the optimization problems encounter non-convex constraints. By utilizing mathematical approaches like S-lemma and semidefinite relaxations (SDR), these stubborn obstacles can be eliminated and the problems can therefore be solved efficiently. Numerical results are provided to demonstrate the performance of proposed designs.