Downlink Beamforming for Dynamic Metasurface Antennas

In this work, we study the dynamic metasurface antennas (DMA) for use in the transmission of wireless communication signals instead of conventional metallic antennas. DMA belongs to a family of metamaterials, which allow their properties to be reconfigured in real-time. The reconfiguration of DMA is mostly hindered by the associated Lorentzian constrain. In this work, we propose a technique of splitting the Lorentzian constraints into two parts, which allows the avoidance of conventional relaxation techniques. The splitting technique eventually led to performance improvement in both single-user and multiuser MISO systems.