Refracting RIS-Aided Hybrid Satellite-Terrestrial Relay Networks: Joint Beamforming Design and Optimization - Lin, Zhi; Niu, Hehao; An, Kang; Wang, Yong; Zheng, Gan; Chatzinotas, Symeon; Hu, Yihua (IEEE transactions on aerospace and electronic systems, 2022)
Keywords: Alternating optimization (AO); Array signal processing; Beamforming; Design optimization; Downlink; hybrid satellite-terrestrial relay networks (HSTRNs); joint beamforming; Linear antenna arrays; Mathematical analysis; Optimization; Penalty function; Phase shifters; Radio equipment; Reconfigurable intelligent surfaces; refracting RIS; Relay networks; Satellite antennas; Satellites; Singular value decomposition; Taylor series; User requirements; Vectors (mathematics)