Downlink and Uplink Intelligent Reflecting Surface Aided Networks: NOMA and OMA
, 2021 Intelligent reflecting surfaces (IRSs) are envisioned to provide reconfigurable wireless environments for future communication networks. In this paper, both downlink and uplink IRS-aided non-orthogonal multiple access (NOMA) and orthogonal multiple ...
Cheng, Yanyu +4 more
core +1 more source
Federated Learning via Intelligent Reflecting Surface [PDF]
IEEE Transactions on Wireless Communications, 2022 Over-the-air computation (AirComp) based federated learning (FL) is capable of achieving fast model aggregation by exploiting the waveform superposition property of multiple access channels. However, the model aggregation performance is severely limited by the unfavorable wireless propagation channels.
Zhibin Wang +6 more
openaire +3 more sources
Design of Intelligent Reflecting Surface (IRS)-Boosted Ambient Backscatter Systems
IEEE Access, 2022 Passive technologies like ambient backscatter communication (AmBC) and intelligent reflecting surface (IRS) hold enormous potential for ubiquitous connectivity of Internet of Things (IoT) devices in future wireless networks.
Sahar Idrees +3 more
doaj +1 more source
Intelligent Reflecting Surface-Enhanced OFDM: Channel Estimation and Reflection Optimization [PDF]
IEEE Wireless Communications Letters, 2019 In the intelligent reflecting surface (IRS)-enhanced wireless communication system, channel state information (CSI) is of paramount importance for achieving the passive beamforming gain of IRS, which, however, is a practically challenging task due to its
Beixiong Zheng, Rui Zhang
semanticscholar +1 more source
Intelligent Reflecting Surface: Practical Phase Shift Model and Beamforming Optimization [PDF]
ICC 2020 - 2020 IEEE International Conference on Communications (ICC), 2019 Intelligent reflecting surface (IRS) that enables the control of the wireless propagation environment has been looked upon as a promising technology for boosting the spectrum and energy efficiency in future wireless communication systems.
Samith Abeywickrama, Rui Zhang, C. Yuen
semanticscholar +1 more source
Intelligent Reflecting Surface Enhanced Multi-UAV NOMA Networks [PDF]
IEEE Journal on Selected Areas in Communications, 2021 Intelligent reflecting surface (IRS) enhanced multi-unmanned aerial vehicle (UAV) non-orthogonal multiple access (NOMA) networks are investigated. A new transmission framework is proposed, where multiple UAV-mounted base stations employ NOMA to serve ...
Xidong Mu +4 more
semanticscholar +1 more source
Plasma-Based Intelligent Reflecting Surface for Beam-Steering and Polarization Conversion
IEEE Access, 2023 The design of a reflective surface operated in the GHz range is proposed to enable beam-steering and polarization conversion simultaneously. The concept presented in this work relies on plasma-based Intelligent Reflecting Surfaces (IRS) in which the ...
Mirko Magarotto +4 more
doaj +1 more source
Intelligent Reflecting Surface Meets OFDM: Protocol Design and Rate Maximization [PDF]
IEEE Transactions on Communications, 2019 Intelligent reflecting surface (IRS) is a promising new technology for achieving both spectrum and energy efficient wireless communication systems in the future.
Yifei Yang +3 more
semanticscholar +1 more source
Intelligent Reflecting Surface Assisted Terahertz Communications Toward 6G [PDF]
IEEE Wireless Communications, 2021 Terahertz (THz) communications have emerged as a promising candidate to support the heavy data traffic and exploding network capacity in the future 6G wireless networks. However, THz communications are facing many challenges for practical implementation, such as propagation loss, signal blockage, and hardware cost. In this article, an emerging paradigm
Chen, Zhi +4 more
openaire +2 more sources
Intelligent Reflecting Surface Versus Decode-and-Forward: How Large Surfaces are Needed to Beat Relaying? [PDF]
IEEE Wireless Communications Letters, 2019 The rate and energy efficiency of wireless channels can be improved by deploying software-controlled metasurfaces to reflect signals from the source to the destination, especially when the direct path is weak.
Emil Björnson +2 more
semanticscholar +1 more source