Results 31 to 40 of about 153,389 (275)
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
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
Spectral and Energy Efficiency of IRS-Assisted MISO Communication with Hardware Impairments [PDF]
, 2020 In this letter, we analyze the spectral and energy efficiency of an intelligent reflecting surface (IRS)-assisted multiple-input single-output (MISO) downlink system with hardware impairments.
Alouini, Mohamed-Slim +4 more
core +4 more sources
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
Detect Pilot Spoofing Attack for Intelligent Reflecting Surface Assisted Systems
IEEE Access, 2021 Pilot spoofing attack (PSA) is a kind of active eavesdropping, which launches the identical training sequence to manipulate the channel estimation outcome during the pilot training phase.
Xiaoming Liu +3 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
On Half-Power Beamwidth of Intelligent Reflecting Surface [PDF]
IEEE Communications Letters, 2021 Half-power beamwidth (HPBW) is a key parameter to measure the performance of antenna array and the newly proposed intelligent reflecting surface (IRS) systems. In this paper, we first establish a system model for IRS in uniform linear array (ULA) and uniform rectangular array (URA) configurations, then the IRS HPBW in both cases are derived under the ...
Han Han, Yihong Liu, Lei Zhang
openaire +1 more source
SWIPT With Intelligent Reflecting Surfaces Under Spatial Correlation [PDF]
IEEE Wireless Communications Letters, 2021 Intelligent reflecting surfaces (IRSs) can be beneficial to both information and energy transfer, due to the gains achieved by their multiple elements. In this work, we deal with the impact of spatial correlation between the IRS elements, in the context of simultaneous wireless information and power transfer.
Constantinos Psomas, Ioannis Krikidis
openaire +2 more sources
Deep Reinforcement Learning for Intelligent Reflecting Surface-assisted D2D Communications
EAI Endorsed Transactions on Industrial Networks and Intelligent Systems, 2023 In this paper, we propose a deep reinforcement learning (DRL) approach for solving the optimisation problem of the network’s sum-rate in device-to-device (D2D) communications supported by an intelligent reflecting surface (IRS).
Khoi Khac Nguyen +2 more
doaj +1 more source
On the Aperture Efficiency of Intelligent Reflecting Surfaces [PDF]
IEEE Wireless Communications Letters, 2021 The concept of intelligent reflecting surfaces (IRS) has recently gained significant attention due to their ability to manipulate the impinging electromagnetic signals and offer anomalous reflections. In this letter, we derive and address the missing piece of prior works, namely the IRS aperture efficiency .
Shih-Kai Chou +3 more
openaire +3 more sources