Results 11 to 20 of about 1,048 (180)
STAR‐RIS‐assisted scheme for enhancing physical layer security in NOMA systems
IET Communications, 2022 Simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR‐RIS) is capable of achieving full coverage area compared with conventional reflection‐only reconfigurable intelligent surface (RIS).
Shu Xu +4 more
doaj +1 more source
Energy efficiency maximisation for STAR‐RIS assisted full‐duplex communications
IET Communications, 2023 Reconfigurable intelligent surface (RIS) has emerged as a promising technique for enhancing the performance of wireless networks. However, the traditional reflecting‐only RIS requires that the transmitter and receiver ought to be on the same side of the ...
Pengxin Guan +3 more
doaj +1 more source
IEEE Access, 2022 Reconfigurable intelligent surface (RIS) has been proven to be a promising technology for improving the performance of future wireless systems. However, since conventional RIS can only reflect or transmit (i.e., refract) incident signals, it limits the ...
Yiru Wang +3 more
doaj +1 more source
Hybrid Precoding Applied to Multi-Beam Transmitting Reconfigurable Intelligent Surfaces (T-RIS)
Electronics, 2023 In this work, we study hybrid precoding techniques applied to multi-user Transmitting Reconfigurable Intelligent Surface (T-RIS) systems. The T-RIS considered here is a large array of electronically reconfigurable antenna elements illuminated by a small set of active sources.
David Demmer +6 more
openaire +2 more sources
A Review of Phase-Change Materials and Their Potential for Reconfigurable Intelligent Surfaces
Micromachines, 2023 Phase-change materials (PCMs) and metal-insulator transition (MIT) materials have the unique feature of changing their material phase through external excitations such as conductive heating, optical stimulation, or the application of electric or magnetic
Randy Matos, Nezih Pala
doaj +1 more source
IEEE Journal on Selected Areas in Communications, 2022 A novel air-to-ground communication paradigm is conceived, where an unmanned aerial vehicle (UAV)-mounted base station (BS) equipped with multiple antennas sends information to multiple ground users (GUs) with the aid of a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS). In contrast to the conventional RIS whose
Jingjing Zhao +5 more
openaire +3 more sources
Beamforming design for active RIS‐aided NOMA networks
IET Communications, 2023 This paper studies the beamforming design for an active reconfigurable intelligent surface (RIS) aided non‐orthogonal multiple access (NOMA) network. It aims to minimize the transmission power while satisfying the requirement of the quality of service ...
Fengming Yang, Jianxin Dai, Cunhua Pan
doaj +1 more source
IEEE Vehicular Technology Magazine, 2022 Reconfigurable intelligent surfaces (RISs) assist in paving the way for the evolution of conventional vehicular networks to autonomous driving. Having said that, the 3rd Generation Partnership Project (3GPP) faces numerous open challenges concerning the RIS-aided vehicle-to-everything (V2X) solutions of the near future.
Chen, Yuanbin +4 more
openaire +3 more sources
Cross-Tier Interference Mitigation for RIS-Assisted Heterogeneous Networks
Technologies, 2023 With the development of the next generation of mobile networks, new research challenges have emerged, and new technologies have been proposed to address them.
Abdel Nasser Soumana Hamadou +2 more
doaj +1 more source
On the Ergodic Capacity of Reconfigurable Intelligent Surface (RIS)-Aided MIMO Channels
2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall), 2022 Accepted by IEEE VTC 2022 ...
Ouyang, Chongjun +3 more
openaire +2 more sources