Results 281 to 290 of about 462,203 (338)

IRS-Assisted High Mobility Communications Using OTFS Modulation

IEEE Wireless Communications Letters, 2023
Intelligent reflecting surface (IRS) has emerged as a promising technology for fifth generation (5G) and beyond wireless networks that are expected to support high mobility applications. Supporting IRS-assisted high mobility communications is nonetheless
A. Bora, Khoa T. Phan, Yi Hong
semanticscholar   +1 more source

Exploiting Benefits of IRS in Wireless Powered NOMA Networks

IEEE Transactions on Green Communications and Networking, 2022
We consider an intelligent reflecting surface (IRS) wireless-powered NOMA Internet-of-Things (IoT) network, where multiple NOMA IoT devices can communicate with access point (AP) with the aid of IRS.
Xingwang Li, Zhen Xie, Zheng Chu, Varun G. Menon, Shahid Mumtaz, Jian-hua Zhang   +5 more
semanticscholar   +1 more source

Spectrum and Energy Efficiency Optimization in IRS-Assisted UAV Networks

IEEE Transactions on Communications, 2022
Unmanned aerial vehicles (UAVs) have been widely employed in wireless communications, and the performance can be enhanced with the assistance of intelligent reflecting surface (IRS).
Yuhua Su, Xiaowei Pang, Shan-zhi Chen, Xu Jiang, Nan Zhao, Fei Yu   +5 more
semanticscholar   +1 more source

Robust and Secure Sum-Rate Maximization for Multiuser MISO Downlink Systems With Self-Sustainable IRS

IEEE Transactions on Communications, 2021
This paper investigates robust and secure multiuser multiple-input single-output (MISO) downlink communications assisted by a self-sustainable intelligent reflection surface (IRS), which can simultaneously reflect and harvest energy from the received ...
Shaokang Hu, Zhiqiang Wei, Yuanxin Cai, Chang Liu, Derrick Wing Kwan Ng, Jinhong Yuan   +5 more
semanticscholar   +1 more source

IRS-UAV Assisted Secure Integrated Sensing and Communication

IEEE wireless communications
Thanks to its concurrent and dual functions, integrated sensing and communication (ISAC) has been considered as a promising technology for 6G networks.
Jinlei Xu, Xianglin Yu, Lexi Xu, Chengwen Xing, Nan Zhao, Xianbin Wang, D. Niyato   +6 more
semanticscholar   +1 more source

Power Measurement-Based Channel Estimation for IRS-Enhanced Wireless Coverage

IEEE Transactions on Wireless Communications
Intelligent reflecting surface (IRS) has been recognized as a transformative technology for enabling smart and reconfigurable radio environment cost-effectively by leveraging its controllable passive reflection.
He Sun, Lipeng Zhu, Weidong Mei, Rui Zhang   +3 more
semanticscholar   +1 more source

Exploring Sum Rate Maximization in UAV-Based Multi-IRS Networks: IRS Association, UAV Altitude, and Phase Shift Design

IEEE Transactions on Communications, 2022
This paper studies the unmanned aerial vehicle (UAV) based multiple intelligent reflecting surface (IRS) network, where the hovering UAV acts as a base station, and the IRS enhances signal transmission to across obstacle between users and UAV. To achieve
Yabo Li, Haijun Zhang, Keping Long, A. Nallanathan   +3 more
semanticscholar   +1 more source

Resource Allocation for IRS Assisted SGF NOMA Transmission: A MADRL Approach

IEEE Journal on Selected Areas in Communications, 2022
Non-orthogonal multiple access (NOMA) assisted semi-grant-free (SGF) transmission has been viewed as one of the promising technologies to meet massive connectivity requirements of the next-generation networks.
Jian Chen, Liang Guo, Jie Jia, Jian-dong Shang, Xingwei Wang   +4 more
semanticscholar   +1 more source

IR Models

Proceedings of the 2013 Conference on the Theory of Information Retrieval, 2012
In IR research it is essential to know IR models. Research over the past years has consolidated the foundations of IR models. Moreover, relationships have been reported that help to use and position IR models. Knowing about the foundations and relationships of IR models can significantly improve building information management systems.The first part of
openaire   +1 more source

Modeling of Ir adatoms on Ir surfaces

Physical Review B, 1996
We used the embedded-atom method potential to study the structures, adsorption energies, binding energies, migration paths, and energy barriers of the Ir adatom and small clusters on fcc Ir (100), (110), and (111) surfaces. We found that the barrier for single-adatom diffusion is lowest on the (111) surface, higher on the (110) surface, and highest on ...
, Chang, , Wei, , Chen
openaire   +2 more sources