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   Articles with "free massive" as a keyword



Post-Newtonian parameter $γ$ and the deflection of light in ghost-free massive bimetric gravity

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recommendations! Published in 2017 at "Physical Review D"

DOI: 10.1103/physrevd.95.124049

Abstract: We consider the parametrized post-Newtonian (PPN) limit of ghost-free massive bimetric gravity with two mutually non-interacting matter sectors coupled to the two metrics. Making use of a gauge-invariant differential decomposition of the metric perturbations, we… read more here.

Keywords: ghost free; deflection; post newtonian; deflection light ... See more keywords

Achievable Rate Optimization for Aerial Intelligent Reflecting Surface-Aided Cell-Free Massive MIMO System

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recommendations! Published in 2021 at "IEEE Access"

DOI: 10.1109/access.2020.3047450

Abstract: The intelligent reflecting surface (IRS) is considered a core technology of next-generation mobile communication. It has significant advantages in enhancing network coverage, spectrum efficiency, energy efficiency, and deployment cost. Compared with the conventional massive multiple-input-multiple-output… read more here.

Keywords: mimo; system; mimo system; cell free ... See more keywords

Spectral Efficiency of Network-Assisted Full-Duplex for Cell-Free Massive MIMO System Under Pilot Contamination

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recommendations! Published in 2021 at "IEEE Access"

DOI: 10.1109/access.2021.3100491

Abstract: A cell-free massive multiple-input multiple-output (MIMO) network-assisted full-duplex (NAFD) system has been proposed to satisfy the exploding demand of higher data transmission speed and more efficient communication. However, a growing number of users in a… read more here.

Keywords: system; cell free; free massive; pilot contamination ... See more keywords
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Scalable Cell-Free Massive MIMO Networks With LEO Satellite Support

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3164097

Abstract: This paper presents an integrated network architecture combining a cell-free massive multiple-input multiple-output (CF-M-MIMO) terrestrial layout with a low Earth orbit satellite segment where the scalability of the terrestrial segment is taken into account. The… read more here.

Keywords: cell free; free massive; satellite segment; network ... See more keywords

Performance of Multiuser Downlink Cell-Free Massive MIMO Systems with Hard Deadlines

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3176946

Abstract: Cell-free massive MIMO (mMIMO) is expected to be a novel network architecture to support massive connections, ultra-high transmission rate, and ultra-reliability low-latency transmission. Therefore, applications in ultra-reliable low-latency communications (URLLC) can be served by the… read more here.

Keywords: cell free; free massive; transmission; massive mimo ... See more keywords

Cell-Free Massive MIMO-OFDM Over Spatially Correlated Doubly Selective Channels

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3220907

Abstract: This paper investigates the impact of doubly selective fading channels on the design and performance analysis of cell-free massive multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) networks. Time and frequency selectivity, as well as the… read more here.

Keywords: doubly selective; cell free; frequency; free massive ... See more keywords

Physical Layer Security for IRS-UAV-Assisted Cell-Free Massive MIMO Systems

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recommendations! Published in 2024 at "IEEE Access"

DOI: 10.1109/access.2024.3419888

Abstract: An intelligent reflecting surface (IRS) is a promising technology for future wireless communication. It comprises many hardware-efficient passive elements. The applications of unmanned aerial vehicles (UAVs) have expanded beyond military missions owing to their mobility,… read more here.

Keywords: cell free; irs uav; free massive; layer security ... See more keywords

Performance Analysis and Optimization of NOMA-Based Cell-Free Massive MIMO for IoT

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

DOI: 10.1109/jiot.2021.3130026

Abstract: This article investigates the performance of nonorthogonal multiple access (NOMA)-based cell-free massive multiple-input–multiple-output (mMIMO) for the Internet of Things (IoT) considering spatially correlated Rician fading channels. The exact closed form of downlink spectral efficiency (SE)… read more here.

Keywords: cell free; noma based; free massive; based cell ... See more keywords

G-SC-IRSA: Graph-Based Spatially Coupled IRSA for Age-Critical Grant-Free Massive Access

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

DOI: 10.1109/jiot.2022.3232568

Abstract: In this article, we focus on a grant-free massive access setup and analyze its Age of Information (AoI), where a large number of user equipments (UEs) are randomly activated and attempt to transmit status update… read more here.

Keywords: grant free; massive access; age; free massive ... See more keywords

Pilot Assignment and Power Control in Secure UAV-Enabled Cell-Free Massive MIMO Networks

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

DOI: 10.1109/jiot.2023.3296736

Abstract: This article investigates the pilot assignment and power control (PC) problems for secure unmanned aerial vehicle (UAV) communications in a cell-free massive multi-input–multioutput network with the user-centric scheme, where numerous distributed access points (APs) simultaneously… read more here.

Keywords: cell free; pilot assignment; assignment power; power control ... See more keywords

Cell-Free Massive MIMO-OFDM: Asynchronous Reception and Performance Analysis

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

DOI: 10.1109/jiot.2023.3333532

Abstract: Cell-free massive multiple-input–multiple-output (CF mMIMO) is a promising technology to enhance the spectrum efficiency in future wireless systems by leveraging distributed access points (APs) to jointly serve the users over the same time-frequency resource. However,… read more here.

Keywords: reception; cell free; asynchronous reception; free massive ... See more keywords