Articles with "noma system" as a keyword



Optimized Power Allocation for a Cooperative NOMA System with SWIPT and an Energy-Harvesting User

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Published in 2020 at "International Journal of Electronics"

DOI: 10.1080/00207217.2020.1756432

Abstract: ABSTRACT This paper investigates the solution to an optimisation problem to minimise the total transmission power at the transmitter in a cooperative non-orthogonal multiple access (NOMA) system with simultaneous wireless information and power transfer (SWIPT)… read more here.

Keywords: noma system; power; energy harvesting; problem ... See more keywords
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Full-duplex cooperative NOMA system under impacts of residual SI and MAI

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Published in 2020 at "International Journal of Electronics"

DOI: 10.1080/00207217.2020.1818844

Abstract: ABSTRACT In this paper, we investigate the performance of a downlink cooperative non-orthogonal multiple access (C-NOMA) system with full-duplex decode-and-forward relaying, where a NOMA user with better channel operates as a full-duplex (FD) relay to… read more here.

Keywords: system; cooperative noma; impacts residual; noma ... See more keywords

Physical Layer Security Performance Analysis of the FD-Based NOMA-VC System

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Published in 2019 at "IEEE Access"

DOI: 10.1109/access.2019.2936036

Abstract: In this paper, we consider the secrecy outage probability (SOP) of a cooperative non-orthogonal multiple access (NOMA) vehicular communication (VC) system, where the relay is working in either half-duplex (HD) or full-duplex (FD) mode. We… read more here.

Keywords: physical layer; system; layer security; performance ... See more keywords

Investigations on Secrecy Performance of Downlink Overlay CR-NOMA System With SIC Imperfections

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Published in 2024 at "IEEE Access"

DOI: 10.1109/access.2024.3361038

Abstract: Cognitive radio (CR) and non-orthogonal multiple access (NOMA) are two technologies witnessed to offer tremendous possibilities for the next generation wireless networks to maximise their usage of available spectrum. In this work, we evaluate the… read more here.

Keywords: performance; noma system; downlink; secrecy performance ... See more keywords

4-D Structured Tensor Decomposition-Based Channel Estimation for RIS-Aided mmWave MIMO-NOMA System in Internet of Vehicles

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Published in 2025 at "IEEE Internet of Things Journal"

DOI: 10.1109/jiot.2025.3550933

Abstract: Severe Doppler shift and the obstruction of the Line-of-Sight (LoS) path significantly decrease the communication performance. This article considers a downlink channel estimation problem for reconfigurable intelligent surface (RIS)-aided millimeter-wave (mmWave) multiple-input-multiple-output nonorthogonal multiple access… read more here.

Keywords: tensor; ris aided; mimo noma; noma system ... See more keywords

On the Achievable Spectral Efficiency of Spatial Modulation Aided Downlink Non-Orthogonal Multiple Access

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Published in 2017 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2017.2707068

Abstract: In this letter, a novel spatial modulation aided non-orthogonal multiple access (SM-NOMA) system is proposed. We use mutual information (MI) to characterize the achievable spectral efficiency (SE) of the proposed SM-NOMA system. Due to the… read more here.

Keywords: multiple access; spatial modulation; non orthogonal; modulation aided ... See more keywords

Energy Efficiency–Delay Tradeoff for a Cooperative NOMA System

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Published in 2019 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2019.2900320

Abstract: The tradeoff between the energy efficiency (EE) and delay problem in the cooperative relaying system is studied by using non-orthogonal multiple access (NOMA) in this letter. To obtain an efficiency tradeoff between EE and delay,… read more here.

Keywords: energy efficiency; system; cooperative noma; noma system ... See more keywords

Ergodic Performance of Downlink Untrusted NOMA System With Imperfect SIC

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Published in 2022 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2021.3126746

Abstract: In this letter, the ergodic performance of a non-orthogonal multiple access (NOMA) system with untrusted users and imperfect successive interference cancellation based decoding is manifested. Closed-form expressions of the ergodic rate and the ergodic secrecy… read more here.

Keywords: performance downlink; ergodic performance; downlink untrusted; noma system ... See more keywords

Index Modulation for STAR-RIS Assisted NOMA System

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Published in 2023 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2022.3223968

Abstract: In this letter, we first incorporate the concept of index modulation (IM) into simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided non-orthogonal multiple access (NOMA) system to improve the spectral efficiency. Specifically, the proposed… read more here.

Keywords: star ris; noma system; star;
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Average Rate Maximization for Mobile STAR-RIS-Aided NOMA System

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Published in 2023 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2023.3261442

Abstract: Simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) has been regarded as a revolutionary technology for the sixth generation (6G) mobile networks. This letter investigates the transmission scheme for mobile STAR-RIS-assisted non-orthogonal multiple access (NOMA)… read more here.

Keywords: star ris; noma system; star; mobile star ... See more keywords

Transmit Power Minimization for RIS-Assisted MIMO-NOMA System

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Published in 2024 at "IEEE Communications Letters"

DOI: 10.1109/lcomm.2024.3384228

Abstract: Reconfigurable intelligent surfaces (RISs), especially the simultaneous transmitting and reflecting RISs (STAR-RISs), can be integrated with multiple-input mutiple output (MIMO) and non-orthogonal multiple access (NOMA) to improve coverage and save power usage. In this letter,… read more here.

Keywords: transmit power; noma; mimo noma; noma system ... See more keywords