نتایج جستجو برای: intelligent reflecting surface

تعداد نتایج: 747955  

Journal: :IEEE Communications Letters 2023

In this letter, we study a rate-splitting multiple access (RSMA)-based intelligent reflecting surface (IRS)-aided multi-user multiple-input single-output (MISO) secure communication system with potential eavesdropper (Eve). Aiming to maximize the minimum secrecy rate (SR) among all legitimate users (LUs), design problem for jointly optimizing transmit beamforming artificial noise (AN), IRS beam...

Journal: :IEEE Transactions on Wireless Communications 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) orthogonal (OMA) networks studied, in which an IRS is deployed enhance the coverage by assisting a cell-edge user device (UD) communicate with base station (BS). To charact...

Journal: :IEEE Wireless Communications Letters 2021

Cell-free networks are considered to be a promising distributed network architecture satisfy the increasing number of users and high rate expectations in beyond-5G systems. However, further enhance capacity, an high-cost base stations (BSs) is required. To address this problem inspired by cost-effective intelligent reflecting surface (IRS) technique, we propose fully decentralized design framew...

Journal: :Electronics Letters 2021

The intelligent reflecting surface (IRS) is an emerging technique to extend wireless coverage. In this letter, the performance of hybrid automatic repeat request (hybrid ARQ) for IRS-assisted system analysed. More specifically, outage IRS-aided using ARQ protocol with chase combining studied. asymptotic analysis also shows that better and improves linearly by increasing number reflectors system...

Journal: :IEEE Journal on Selected Areas in Communications 2022

Intelligent reflecting surface (IRS) is envisioned to change the paradigm of wireless communications from “adapting channels” “changing channels”. However, current IRS configuration schemes, consisting sub-channel estimation and passive beamforming in sequence, conform conventional model-based design philosophies are difficult be realized practically complex radio environment. To create smart e...

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