Results 31 to 40 of about 5,532 (201)

Intelligent Reflecting Surface Enabled Covert Communications in Wireless Networks

IEEE Network, 2020
With growing security threats to the evolving wireless systems, protecting user privacy becomes progressively challenging. Even if the transmitted information is encrypted and the potential wiretap channel is physically limited (e.g. through information-theoretic security approaches), the raw data itself, such as transmitter position and transmission ...
Lu, Xiao, Hossain, Ekram, Shafique, Tania, Feng, Shaohan, Jiang, Hai, Niyato, Dusit   +5 more
openaire   +2 more sources

Capacity Improvement for Intelligent Reflecting Surface-Assisted Wireless Systems With a Small Portion of Active Elements

IEEE Access, 2022
In this study, the use of intelligent reflecting surfaces (IRSs) to improve the capacity of a multi-user multiple-input-single-output downlink system is investigated.
Jung-Chieh Chen
doaj   +1 more source

Physical Layer Security Enhancement via Intelligent Omni-Surfaces and UAV-Friendly Jamming

IEEE Access, 2023
Intelligent reflecting surfaces (IRS) are considered one of the prominent technologies to be adopted in 6G and beyond networks. However, one of the main IRS limitations is restricting the communication to the reflective dimension, which means that users ...
A. M. Benaya, Mahmoud H. Ismail, Ahmed S. Ibrahim, A. Abdelaziz Salem   +3 more
doaj   +1 more source

Joint Beamforming and Phase Shift Design for Hybrid IRS and UAV-Aided Directional Modulation Networks

Drones, 2023
Recently, intelligent reflecting surfaces (IRSs) and unmanned aerial vehicles (UAVs) have been integrated into wireless communication systems to enhance the performance of air–ground transmission. To balance performance, cost, and power consumption well,
Rongen Dong, Hangjia He, Feng Shu, Qi Zhang, Riqing Chen, Shihao Yan, Jiangzhou Wang   +6 more
doaj   +1 more source

IRS, LIS, and Radio Stripes-Aided Wireless Communications: A Tutorial

Applied Sciences, 2022
This is a tutorial on current techniques that use a huge number of antennas in intelligent reflecting surfaces (IRS), large intelligent surfaces (LIS), and radio stripes (RS), highlighting the similarities, differences, advantages, and drawbacks.
Ali Gashtasbi, Mário Marques da Silva, Rui Dinis   +2 more
doaj   +1 more source

Impact of Amplitude Response on the Capacity of an Intelligent-Reflecting-Surface-Enabled Narrowband SISO System

Engineering Proceedings, 2023
Future wireless networks are characterized as having a combination of various technologies such as artificial intelligence, machine learning, combined communication, sensing and others.
Aisha Danish, Naureen Farhan
doaj   +1 more source

Intelligent Reflecting Surface-Assisted Multi-User MISO Communication: Channel Estimation and Beamforming Design

IEEE Open Journal of the Communications Society, 2020
The concept of reconfiguring wireless propagation environments using intelligent reflecting surfaces (IRS)s has recently emerged, where an IRS comprises of a large number of passive reflecting elements that can smartly reflect the impinging ...
Qurrat-Ul-Ain Nadeem, Hibatallah Alwazani, Abla Kammoun, Anas Chaaban, Merouane Debbah, Mohamed-Slim Alouini   +5 more
doaj   +1 more source

mmWave Doubly-Massive-MIMO Communications Enhanced With an Intelligent Reflecting Surface: Asymptotic Analysis

IEEE Access, 2020
As a means to control wireless propagation environments, the use of emerging and novel intelligent reflecting surfaces (IRS) is envisioned to enhance and broaden many applications in future wireless networks.
Dian-Wu Yue, Ha H. Nguyen, Yu Sun
doaj   +1 more source

RIS Assisted Anti-Jamming in Next-Generation Wireless Communication Networks: A Survey of Threats, Solutions, and Research Challenges

IEEE Open Journal of the Communications Society
Rapid growth in wireless data traffic and the increasing demand for secure, low-latency communication have driven research toward next-generation (6G) technology, which aims to provide ubiquitous, secure wireless connectivity.
Zain Ul Abideen Tariq, Emna Baccour, Aiman Erbad, Mounir Hamdi   +3 more
doaj   +1 more source

A Survey on RIS Advances in Terahertz Communications: Emerging Paradigms and Research Frontiers

IEEE Access
Communication at terahertz (THz) frequencies has emerged as a potential answer to the challenge of providing massive capacity and ultra-high data speeds for 6G wireless networks.
Manzoor Ahmed, Abdul Wahid, Wali Ullah Khan, Feroz Khan, Asim Ihsan, Zain Ali, Khaled M. Rabie, Thokozani Shongwe, Zhu Han   +8 more
doaj   +1 more source