Results 11 to 20 of about 5,257 (262)
Intelligent Reflecting Surface-Aided Wireless Communications: A Tutorial [PDF]
IEEE Transactions on Communications, 2021 Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal prorogation in wireless networks. By smartly tuning the signal reflection via a large number of low-cost passive reflecting elements, IRS is capable of dynamically altering wireless channels to enhance the communication performance.
Qingqing Wu +4 more
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Semi-Blind Channel Estimation for Intelligent Reflecting Surfaces in Massive MIMO Systems
IEEE Access, 2022 Intelligent reflecting surface (IRS) is considered as a promising technology for enhancing the transmission rate in cellular networks. Such improvement is attributed to considering a large IRS with high number of passive reflecting elements, optimized to
Ahmed S. Alwakeel, Ahmed Elzanaty
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Intelligent Reflecting Surface Enhanced Millimeter-Wave NOMA Systems [PDF]
IEEE Communications Letters, 2020 In this paper, a downlink intelligent reflecting surface (IRS) enhanced millimeter-wave (mmWave) non-orthogonal multiple access (NOMA) system is considered. A joint optimization problem over active beamforming, passive beamforming and power allocation is formulated. Due to the highly coupled variables, the formulated optimization problem is non-convex.
Jiakuo Zuo +3 more
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Revolutionizing Optical Wireless Communications via Smart Optics
IEEE Open Journal of the Communications Society, 2022 The heterogeneity of optical wireless networks (OWNs) has expanded over decades in terms of services, node densities, mobility requirements, bandwidth needs, responsiveness, and physical device profile.
Amr M. Abdelhady +3 more
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Intelligent Reflecting Surfaces for Underwater Visible Light Communications
IEEE Photonics Journal, 2023 Intelligent reflecting surfaces (IRSs) offer paradigm shift towards enhancing the capabilities of wireless communications. The use of this emerging technology in the realm of underwater wireless systems is a promising solution to overcome the limitations
Yalcin Ata +4 more
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Covert Federated Learning via Intelligent Reflecting Surfaces
IEEE Transactions on Communications, 2023 Over-the-air computation (OAC) is a promising technology that can achieve rapid model aggregation by utilizing the wireless waveform superposition feature to harness the interference of multiple-access channel for wireless federated learning (FL). However, OAC-based aggregation for OAC faces critical security challenges due to unfavorable and wireless ...
Jie Zheng +5 more
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Massive MIMO Communication With Intelligent Reflecting Surface
IEEE Transactions on Wireless Communications, 2023 This paper studies the feasibility of deploying intelligent reflecting surfaces (IRSs) in massive MIMO (multiple-input multiple-output) systems to improve the performance of users in the service dead zone. To reduce the channel training overhead, we advocate a novel protocol for the uplink communication in the IRS-assisted massive MIMO systems.
Zhaorui Wang +3 more
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Enabling Panoramic Full-Angle Reflection Via Aerial Intelligent Reflecting Surface [PDF]
2020 IEEE International Conference on Communications Workshops (ICC Workshops), 2020 This paper proposes a new three dimensional (3D) networking architecture enabled by aerial intelligent reflecting surface (AIRS) to achieve panoramic signal reflection from the sky. Compared to the conventional terrestrial IRS, AIRS not only enjoys higher deployment flexibility, but also is able to achieve 360$^\circ$ panoramic full-angle reflection ...
Lu, Haiquan +3 more
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Electromagnetic Model of Reflective Intelligent Surfaces [PDF]
IEEE Open Journal of the Communications Society, 2021 An accurate and simple analytical model for the computation of the reflection amplitude and phase of Reconfigurable Intelligent Surfaces is presented. The model is based on a transmission-line circuit representation of the RIS which takes into account the physics behind the structure including the effect of all relevant geometrical and electrical ...
Costa F., Borgese M.
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Hybrid Relay-Reflecting Intelligent Surface-Assisted Wireless Communications
IEEE Transactions on Vehicular Technology, 2022 Reconfigurable intelligent surface (RIS) has emerged as a cost- and energy-efficient solution to enhance the wireless communication capacity. However, recent studies show that a very large surface is required for a RIS-assisted communication system; otherwise, they may be outperformed by the conventional relay.
Nhan Thanh Nguyen +3 more
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