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   Articles with "ris aided" as a keyword



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Subarray Partition Algorithms for RIS-Aided MIMO Communications

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

DOI: 10.1109/jiot.2022.3150971

Abstract: In order to reduce computational complexity and hardware cost for reconfigurable intelligent surface (RIS)-aided multiple-input–multiple-output (MIMO) systems, in this article, the subarray partition algorithm designs at RIS are investigated. Without instantaneous channel state information (CSI)… read more here.

Keywords: subarray partition; partition; partition algorithms; ris aided ... See more keywords
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RIS-Aided Ground-Aerial NOMA Communications: A Distributionally Robust DRL Approach

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recommendations! Published in 2022 at "IEEE Journal on Selected Areas in Communications"

DOI: 10.1109/jsac.2022.3143230

Abstract: A reconfigurable intelligent surface (RIS) aided air-to-ground uplink non-orthogonal transmission framework is investigated for next generation multiple access. Occupying the same spectrum resource, unmanned aerial vehicle (UAV) users and ground users (GUs) are connected to… read more here.

Keywords: distributionally robust; noma; ground; ris aided ... See more keywords
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Performance Analysis of RIS-Aided Networks With Co-Channel Interference

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2021.3122468

Abstract: In this letter, we investigate the performance of reconfigurable intelligent surface (RIS)-aided networks in the presence of non-identically distributed interferers at the destination. A mathematical framework is proposed to statistically characterize the cascaded channels and… read more here.

Keywords: ris aided; interference; analysis; aided networks ... See more keywords
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GSIC for RIS-Aided Uplink Multi-Antenna NOMA Systems

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2021.3125689

Abstract: The combination of non-orthogonal multiple access (NOMA) and reconfigurable intelligent surface (RIS) is capable of boosting spectrum and energy efficiency for future communication networks. In this letter, we aim to minimize the total transmit power… read more here.

Keywords: aided uplink; ris aided; uplink multi; transmit power ... See more keywords
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RIS-Aided D2D Communications Relying on Statistical CSI With Imperfect Hardware

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2021.3133321

Abstract: In this letter, we investigate a reconfigurable intelligent surfaces (RIS)-aided device to device (D2D) communication system over Rician fading channels with imperfect hardware including both hardware impairment at the transceivers and phase noise at the… read more here.

Keywords: aided d2d; hardware impairments; ris aided; imperfect hardware ... See more keywords
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RIS-Aided Multiple User Interference Mitigation via Fast Successive Upper-Bound Minimization Method

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2022.3173614

Abstract: Reconfigurable intelligent surfaces (RIS) aided multiple user interference mitigation with constant modulus constraint (CMC) is a key issue in the future 6G communication systems. Usually, the existing methods solve this problem either by relaxing the… read more here.

Keywords: interference mitigation; aided multiple; ris aided; method ... See more keywords
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A Novel Anchor-Assisted Channel Estimation for RIS-Aided Multiuser Communication Systems

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2022.3179298

Abstract: Channel state information (CSI) acquisition is a crucial but challenging task in reconfigurable intelligent surface (RIS)-aided wireless systems due to the passive property of RIS. In this letter, we investigate a novel anchor-assisted channel estimation… read more here.

Keywords: channel estimation; ris aided; assisted channel; anchor assisted ... See more keywords
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Worst-Case Design for RIS-Aided Over-the-Air Computation With Imperfect CSI

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2022.3183869

Abstract: Over-the-air computation (AirComp) enables fast wireless data aggregation at the receiver through concurrent transmission by sensors in the application of Internet-of-Things (IoT). To further improve the performance of AirComp under unfavorable propagation channel conditions, we… read more here.

Keywords: computation; ris aided; design; air computation ... See more keywords
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Rate-Splitting Multiple Access for RIS-Aided Cell-Edge Users With Discrete Phase-Shifts

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2022.3195199

Abstract: This letter investigates a reconfigurable intelligent surface (RIS)-aided multiple-input-single-output (MISO) communication system which uses rate-splitting multiple access (RSMA) protocol. A multi-antenna base-station (BS) communicates with $K$ cell-edge users using RSMA protocol. Each user is assisted… read more here.

Keywords: cell edge; ris aided; multiple access; splitting multiple ... See more keywords
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Input-Output Relation and Performance of RIS-Aided OTFS With Fractional Delay-Doppler

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recommendations! Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2022.3214678

Abstract: This letter presents an early investigation of reconfigurable intelligent surfaces (RIS)-aided orthogonal time-frequency space (OTFS) in high-Doppler channels. We derive the end-to-end delay-Doppler (DD) domain input-output relation of a RIS-aided OTFS system, considering rectangular pulses… read more here.

Keywords: aided otfs; ris aided; tex math; inline formula ... See more keywords
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Secure Wireless Communication in RIS-Aided MISO System With Hardware Impairments

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recommendations! Published in 2021 at "IEEE Wireless Communications Letters"

DOI: 10.1109/lwc.2021.3064992

Abstract: In practice, residual transceiver hardware impairments inevitably lead to distortion noise which causes the performance loss. In this letter, we study the robust transmission design for a reconfigurable intelligent surface (RIS)-aided secure communication system in… read more here.

Keywords: hardware impairments; system; hardware; communication ... See more keywords