Joint Beamforming for STAR-RIS in Near-Field Communications
- Resource Type
- Conference
- Authors
- Li, Haochen; Liu, Yuanwei; Mu, Xidong; Chen, Yue; Zhiwen, Pan
- Source
- GLOBECOM 2023 - 2023 IEEE Global Communications Conference Global Communications Conference, GLOBECOM 2023 - 2023 IEEE. :625-630 Dec, 2023
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineering Profession
General Topics for Engineers
Power, Energy and Industry Applications
Signal Processing and Analysis
Base stations
Array signal processing
Simulation
Reconfigurable intelligent surfaces
Global communication
MIMO communication
Optimization
- Language
- ISSN
- 2576-6813
A simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided near-field multiple-input multiple-output (MIMO) communication framework is proposed. A weighted sum rate maximization problem for the joint optimization of the active beamforming at the base station (BS) and the transmission/reflection-coefficients (TRCs) at the STAR-RIS is formulated. The resulting non-convex problem is solved by the developed block coordinate descent (BCD)-based algorithm. Numerical results illustrate that the near-field beamforming for the STAR-RIS aided MIMO communications significantly improve the achieved weighted sum rate.