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Cell-Free Massive MIMO systems
2015 49th Asilomar Conference on Signals, Systems and Computers, 2015Cell-Free Massive MIMO systems comprise a large number of distributed, low cost, and low power access point antennas, connected to a network controller. The number of antennas is significantly larger than the number of users. The system is not partitioned into cells and each user is served by all access point antennas simultaneously.
Elina Nayebi +3 more
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2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2021
We derive formulas and algorithms to numerically calculate SINRs and max-min power controls for Cell-Free Massive MIMO in LoS channels. We consider MR (maximum-ratio), ZF (zero-forcing), and optimal linear processing for both downlink and uplink. Unlike cellular Massive MIMO, users in cell-free are statistically similar, thus dropping or rescheduling ...
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We derive formulas and algorithms to numerically calculate SINRs and max-min power controls for Cell-Free Massive MIMO in LoS channels. We consider MR (maximum-ratio), ZF (zero-forcing), and optimal linear processing for both downlink and uplink. Unlike cellular Massive MIMO, users in cell-free are statistically similar, thus dropping or rescheduling ...
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Full-Duplex Cell-Free Massive MIMO
ICC 2019 - 2019 IEEE International Conference on Communications (ICC), 2019This work studies a novel full-duplex (FD) cell-free massive multiple-input multiple-output (MIMO) network, where a very large number of multiple-antenna access points (APs) simultaneously serve many single-antenna uplink and downlink users in the same frequency band. The APs operate in the FD mode while the users in the half-duplex (HD) mode.
Vu, Tung T. +3 more
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SWIPT in Cell-Free Massive MIMO
2018 IEEE Global Communications Conference (GLOBECOM), 2018In this paper, the performance of simultaneous wireless information and power transfer (SWIPT) for training-based cell-free massive multiple-input multiple-output (MIMO) is investigated. The key idea is to simultaneously transmit information and power via a larger number of spatially-distributed single antenna access points (APs) towards geographically-
Rajan Shrestha, Gayan Amarasuriya
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SWIPT-Enhanced Cell-Free Massive MIMO Networks
IEEE Transactions on Communications, 2021Simultaneous wireless information and power transfer (SWIPT) has been advocated as a highly promising technology to provide near- perpetual operation to low-powered wireless devices in Internet-of-Things (IoT)-based wireless networks. In this paper, a SWIPT-enhanced cell-free massive MIMO network is proposed. In such a network, a large set of spatially
Guillem Femenias +2 more
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Cell-Free Massive MIMO: User-Centric Approach
IEEE Wireless Communications Letters, 2017Recently, the so-called cell-free (CF) massive MIMO architecture has been introduced, wherein a very large number of distributed access points simultaneously and jointly serve a much smaller number of mobile stations. This letter introduces a user-centric (UC) virtual cell approach to CF massive MIMO, wherein each user is served only by a limited ...
Stefano Buzzi, Carmen D'Andrea
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FDD-Based Cell-Free Massive MIMO Systems
2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2018Cell-free massive MIMO system is a promising technology of 5G wireless communications that provide a user-centric coverage to the user by the basestation cooperation. Most prior works on the cell-free massive MIMO systems assume the time division duplexing (TDD) systems, although the frequency division duplexing (FDD) systems dominate the current ...
Seungnyun Kim, Byonghyo Shim
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SWIPT-NOMA in Cell-Free Massive MIMO
2020 28th Iranian Conference on Electrical Engineering (ICEE), 2020In this paper, the performance of a Simultaneously Wireless Information and Power Transfer combined with the Non-Orthogonal Multiple Access (SWIPT-NOMA) in a cell-free massive MIMO (CFMM) network is evaluated, where users are authorized to decode data as well as harvest power simultaneously.
Shayan Zargari +3 more
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Power Minimization for Cell-Free Massive MIMO
2019 IEEE International Conference on Consumer Electronics - Taiwan (ICCE-TW), 2019In this paper, we investigate the total power minimization problem for the downlink cell-free massive multiple- input multiple-output (mMIMO) system, subjecting to the users' quality-of-service (QoS) constraint. Specifically, the total power consists of circuit power, data transmission power, and backhaul power.
Yao Zhang +4 more
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NOMA-Aided Cell-Free Massive MIMO Systems
IEEE Wireless Communications Letters, 2018A cell-free massive multiple-input multiple-output system with non-orthogonal multiple-access (NOMA) is investigated. An achievable sum rate is derived and compared against the orthogonal multiple access (OMA) counterpart. Thereby, the detrimental effects of intra-cluster pilot contamination, inter-cluster interference and imperfect successive ...
Yikai Li, Gayan Amarasuriya Aruma Baduge
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