Post-Newtonian parameter $γ$ and the deflection of light in ghost-free massive bimetric gravity
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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
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Scalable Cell-Free Massive MIMO Networks With LEO Satellite Support
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Performance Analysis and Optimization of NOMA-Based Cell-Free Massive MIMO for IoT
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Cell-Free Massive MIMO-OFDM for High-Speed Train Communications
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Journal on Selected Areas in Communications"
DOI: 10.1109/jsac.2022.3196088
Abstract: Cell-free (CF) massive multiple-input multiple-output (MIMO) systems show great potentials in low-mobility scenarios, due to cell boundary disappearance and strong macro diversity. However, the great Doppler frequency offset (DFO) leads to serious inter-carrier interference in… read more here.
Keywords: cell free; massive mimo; mimo ofdm; free massive ... See more keywords
Asynchronous Cell-Free Massive MIMO With Rate-Splitting
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Journal on Selected Areas in Communications"
DOI: 10.1109/jsac.2023.3240709
Abstract: In practical cell-free (CF) massive multiple-input multiple-output (MIMO) networks with distributed and low-cost access points, the asynchronous arrival of signals at the user equipments increases multi-user interference that degrades the system performance. Meanwhile, rate-splitting (RS),… read more here.
Keywords: cell free; free massive; mimo; massive mimo ... See more keywords
Spectral and Energy Efficiency in Cell-Free Massive MIMO Systems Over Correlated Rician Fading
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Systems Journal"
DOI: 10.1109/jsyst.2020.2993048
Abstract: In this article, we investigate the downlink (DL) of a cell-free massive multiple-input multiple-output (MIMO) system over spatially correlated Rician fading, in which many distributed access points (APs) equipped with multiple antennas serve single-antenna users.… read more here.
Keywords: mimo; cell free; rician fading; correlated rician ... See more keywords