Results 21 to 30 of about 60,314 (279)
On IRS-Assisted Covert Communication with a Friendly UAV
Drones, 2023 Driven by the rapidly growing demand for information security, covert wireless communication has become an essential technology and attracted tremendous attention.
Xiaobei Xu +6 more
doaj +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
Intelligent Reflecting Surface Aided Multigroup Multicast MISO Communication Systems [PDF]
, 2020 Intelligent reflecting surface (IRS) has recently been envisioned to offer unprecedented massive multiple-input multiple-output (MIMO)-like gains by deploying large-scale and low-cost passive reflection elements. By adjusting the reflection coefficients,
Nallanathan, Arumugam +4 more
core +2 more sources
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
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 Surfaces With Spatial Modulation: An Electromagnetic Perspective
IEEE Open Journal of the Communications Society, 2020 Electromagnetic wave control using the concept of a reflecting surface is first studied as a near-field and a far-field problem. Using a secondary source present in a wireless communication environment, such as a backscatter tag, it is possible to ...
Okan Yurduseven +2 more
doaj +1 more source
User Localization via Multiple Intelligent Reflecting Surfaces for LOS-Dominated Channels
IEEE Access, 2023 Intelligent reflecting surfaces (IRSs) in the millimeter-wave (mmWave) and terahertz (THz) frequency bands offer precise wireless localization capabilities for future networks.
Mojtaba Ghermezcheshmeh, Nikola Zlatanov
doaj +1 more source
Sensors, 2022 The existing sub-6 GHz band is insufficient to support the bandwidth requirement of emerging data-rate-hungry applications and Internet of Things devices, requiring ultrareliable low latency communication (URLLC), thus making the migration to millimeter ...
Fred Chimzi Okogbaa +6 more
doaj +1 more source
Intelligent Reflecting Surface Assisted Free-Space Optical Communications [PDF]
IEEE Communications Magazine, 2021 Free-space optical (FSO) systems are able to offer the high data-rate, secure, and cost-efficient communication links required for applications such as wireless front- and backhauling for 5G and 6G communication networks. Despite the substantial advancement of FSO systems over the past decades, the requirement of a line-of-sight connection between ...
Jamali, Vahid +5 more
openaire +3 more sources
Security Hardening of Intelligent Reflecting Surfaces Against Adversarial Machine Learning Attacks
IEEE Access, 2022 Next-generation communication networks, also known as NextG or 5G and beyond, are the future data transmission systems that aim to connect a large amount of Internet of Things (IoT) devices, systems, applications, and consumers at high-speed data ...
Ferhat Ozgur Catak +4 more
doaj +1 more source