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   Articles with "passive beamforming" as a keyword



URLLC Facilitated by Mobile UAV Relay and RIS: A Joint Design of Passive Beamforming, Blocklength, and UAV Positioning

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recommendations! Published in 2021 at "IEEE Internet of Things Journal"

DOI: 10.1109/jiot.2020.3027149

Abstract: Upcoming fifth-generation (5G) networks need to support novel ultrareliable and low-latency (URLLC) traffic that utilizes short packets. This requires a paradigm shift as traditional communication systems are designed to transmit only long data packets based… read more here.

Keywords: urllc facilitated; blocklength; mobile uav; ris ... See more keywords

Machine-Learning-Empowered Passive Beamforming and Routing Design for Multi-RIS-Assisted Multihop Networks

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recommendations! Published in 2022 at "IEEE Internet of Things Journal"

DOI: 10.1109/jiot.2022.3195543

Abstract: This article proposes a novel machine-learning-based routing optimization for the multiple reconfigurable intelligent surfaces (M-RIS)-assisted multihop cooperative networks, in which a practical phase model for reconfigurable intelligent surface (RIS) with the amplitude variation based on… read more here.

Keywords: passive beamforming; machine learning; design; ris ... See more keywords

Sum-Rate Maximization in IRS-Assisted Wireless-Powered Multiuser MIMO Networks With Practical Phase Shift

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recommendations! Published in 2023 at "IEEE Internet of Things Journal"

DOI: 10.1109/jiot.2022.3216449

Abstract: The newly emerging intelligent reflecting surface (IRS) with large-scale passive reflecting elements has great potentials to enhance the performance of wireless-powered Internet of Things (IoT) networks, by manipulating the wireless channel. However, most of the… read more here.

Keywords: wireless; phase shift; beamforming; passive beamforming ... See more keywords

Opportunistic Passive Beamforming for RIS-Assisted WiFi Network: System Design and Experimental Validation

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recommendations! Published in 2024 at "IEEE Internet of Things Journal"

DOI: 10.1109/jiot.2024.3411119

Abstract: Reflecting intelligent surface (RIS) has been widely used to enhance radio signals in wireless communications. However, RIS’s capabilities, other than signal enhancement, are rarely investigated, which restricts RIS’s role in assisting wireless communications. In this… read more here.

Keywords: opportunistic passive; network; passive beamforming; ris ... See more keywords

Federated-Learning-Assisted RIS Active and Passive Beamforming with ADMM for IoT Devices

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recommendations! Published in 2025 at "IEEE Internet of Things Journal"

DOI: 10.1109/jiot.2025.3631734

Abstract: Federated learning (FL) and reconfigurable intelligent surfaces (RISs) are pivotal technologies for future Internet of Things (IoT) networks, enhancing user privacy and system efficiency. However, realizing their full potential necessitates a cohesive and synergistic integration,… read more here.

Keywords: learning assisted; assisted ris; ris active; federated learning ... See more keywords

Passive Beamforming and Information Transfer Design for Reconfigurable Intelligent Surfaces Aided Multiuser MIMO Systems

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recommendations! Published in 2020 at "IEEE Journal on Selected Areas in Communications"

DOI: 10.1109/jsac.2020.3000811

Abstract: This paper investigates the passive beamforming and information transfer (PBIT) technique for multiuser multiple-input multiple-output (Mu-MIMO) systems with the aid of reconfigurable intelligent surfaces (RISs), where the RISs enhance the primary communication via passive beamforming… read more here.

Keywords: beamforming information; problem; ris; passive beamforming ... See more keywords
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Joint User Association and Passive Beamforming in Heterogeneous Networks With Reconfigurable Intelligent Surfaces

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recommendations! Published in 2021 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2021.3093362

Abstract: In this letter, the joint design of user association (UA) and passive beamforming (PBF) has been investigated for heterogeneous networks equipped with reconfigurable intelligent surfaces. Firstly, a closed-form lower bound of ergodic rate is derived… read more here.

Keywords: user association; heterogeneous networks; reconfigurable intelligent; passive beamforming ... See more keywords

Passive Beamforming for IRS-Assisted MU-MIMO Systems With One-Bit ADCs: An SER Minimization Design Approach

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2022.3149639

Abstract: In this letter, we investigate the passive beamforming for intelligent reflecting surface (IRS)-assisted multi-user multiple-input multiple-output systems with one-bit analog-to-digital converters aiming at minimizing the symbol error rate (SER). By leveraging the concept of signal… read more here.

Keywords: passive beamforming; one bit; ser; irs assisted ... See more keywords

MSE-Based Joint Transceiver and Passive Beamforming Designs for Intelligent Reflecting Surface-Aided MIMO Systems

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recommendations! Published in 2022 at "IEEE Wireless Communications Letters"

DOI: 10.1109/lwc.2021.3139024

Abstract: In this letter, novel schemes for joint transceiver and passive beamforming design in an intelligent reflecting surface (IRS)-aided multiple-input multiple-output (MIMO) system are developed. Specifically, active beamformer at the BS, passive beamfomer at the IRS,… read more here.

Keywords: reflecting surface; passive beamforming; intelligent reflecting; transceiver passive ... See more keywords

Novel RIS-Aided Receive Spatial Modulation via Joint Active and Passive Beamforming

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recommendations! Published in 2024 at "IEEE Wireless Communications Letters"

DOI: 10.1109/lwc.2024.3359849

Abstract: Existing reconfigurable intelligent surface-aided receive spatial modulation (RIS-RSM) suffers from severe performance degradation in Rician fading channels. To solve this problem, we propose a novel RIS-RSM scheme in this letter for multi-input-multi-output communications. In contrast… read more here.

Keywords: beamforming; ris rsm; passive beamforming; ris ... See more keywords

Joint Passive Beamforming and Deployment Design for Multi-Intelligent Refracting Surface-Aided High-Speed Railway Communication

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recommendations! Published in 2025 at "IEEE Wireless Communications Letters"

DOI: 10.1109/lwc.2025.3568871

Abstract: This letter investigates a multi-intelligent refracting surface (IRS) aided high-speed railway communication system that can provide cooperative passive beamforming gains without incurring additional channel estimation overhead. A novel multi-IRS passive beamforming framework is designed to… read more here.

Keywords: passive beamforming; multi intelligent; beamforming; beamforming deployment ... See more keywords