Multi-User mmWave Uplink Communications Based on Collaborative Double-RIS: Joint Beamforming and Power Control
Qing Xue, Renlong Wei, Shaodan Ma, Yongjun Xu, Li Yan
Abstract
To explore the potential of multiple collaborative reconfigurable intelligent surfaces (RISs) for millimeter wave (mmWave) communications, in this letter, we consider a double-RIS-aided multi-user mmWave uplink communication system, which aims to maximize the system throughput by jointly optimizing multi-user transmission power, active beamforming, and passive beamforming. To address the challenging problem, a low complexity optimization algorithm with a semi-closed-form solution employing fractional programming and minimum mean square error criterion is proposed. The simulation results show that the proposed algorithm has superior performance.
Topics & Concepts
BeamformingTelecommunications linkComputer scienceThroughputPower controlMinimum mean square errorOptimization problemElectronic engineeringTransmission (telecommunications)Power (physics)Computer networkTelecommunicationsAlgorithmWirelessEngineeringMathematicsQuantum mechanicsEstimatorStatisticsPhysicsAdvanced Wireless Communication TechnologiesSatellite Communication SystemsIndoor and Outdoor Localization Technologies