Practical RIS-Aided Coded Systems: Joint Precoding and Passive Beamforming

Article Engineering, Electrical & Electronic

Reconfigurable Intelligent Surface-Assisted Non-Orthogonal Multiple Access

Gang Yang et al.

Summary: Reconfigurable intelligent surface (RIS) is a revolutionary technology for efficient wireless networks, and the paper proposes algorithms to optimize rate performance in an RIS-assisted NOMA system by jointly optimizing transmit beamforming and RIS phase shifts, with efficient algorithms leveraging coordinated descent and SDR techniques. Simulation results show significant rate performance improvement compared to traditional NOMA systems.

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS (2021)

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Article Computer Science, Hardware & Architecture

Reconfigurable-Intelligent-Surface Empowered Wireless Communications: Challenges and Opportunities

Xiaojun Yuan et al.

Summary: Reconfigurable intelligent surfaces (RISs) are considered a promising emerging hardware technology to enhance the performance of wireless networks by altering the propagation environment of electromagnetic waves. This article focuses on the challenges and solutions for incorporating RISs into wireless networks, as well as discussing future research directions.

IEEE WIRELESS COMMUNICATIONS (2021)

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Article Engineering, Electrical & Electronic

Energy Efficiency and Spectral Efficiency Tradeoff in RIS-Aided Multiuser MIMO Uplink Transmission

Li You et al.

Summary: The study focuses on the tradeoff between energy efficiency and spectral efficiency in multiuser MIMO uplink communications aided by reconfigurable intelligent surfaces. A transmission strategy based on partial channel state information and joint optimization of transmit precoding and reflective beamforming is developed to maximize resource efficiency. Numerical results show the effectiveness and rapid convergence rate of the proposed optimization framework.

IEEE TRANSACTIONS ON SIGNAL PROCESSING (2021)

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Article Engineering, Electrical & Electronic