Dynamic User Grouping and Joint Resource Allocation with Multi-Cell Cooperation for Uplink Virtual MIMO Systems [PDF]
, 2017 This paper proposes a novel joint resource allocation algorithm combining dynamic user grouping, multi-cell cooperation and resource block (RB) allocation for single carrier-frequency division multiple access (SC-FDMA) uplink in multicell virtual MIMO ...
Li, Wenna +3 more
core +1 more source
IEEE Access, 2020 In this paper, we propose user grouping, subcarrier allocation, and bit allocation schemes in multicarrier nonorthogonal multiple access (NOMA) systems on downlink beamforming to reduce the total transmit power while considering the data-rate and the ...
Jui-Hung Tseng +2 more
doaj +1 more source
Dynamic Beam Hopping Algorithm for LEO Satellite Systems Based on User Grouping
天地一体化信息网络, 2023 In a satellite communication system deployed with massive MIMO, when the number of users far exceeds the number of beams of the satellite, it is still difficult to satisfy the delay requirements of the satellite communication system even if the number of
Qing SHU +5 more
doaj +2 more sources
Space Division Multiple Access With Distributed User Grouping for Multi-User MIMO-VLC Systems
IEEE Open Journal of the Communications Society, 2020 To support multiple users in an indoor multiple-input multiple-output visible light communication (MIMO-VLC) system adopting spatial multiplexing, orthogonal frequency division multiple access (OFDMA) is usually adopted, where the overall modulation ...
Chen Chen +4 more
doaj +1 more source
Pilot Power Allocation Through User Grouping in Multi-Cell Massive MIMO Systems [PDF]
, 2016 In this paper, we propose a relative channel estimation error (RCEE) metric, and derive closed-form expressions for its expectation $\rm {Exp}_{rcee}$ and the achievable uplink rate holding for any number of base station antennas $M$, with the least ...
Jiang, Tao +4 more
core +2 more sources
Spectral Efficiency Optimization of Uplink Millimeter Wave MIMO-NOMA Systems
Sensors, 2022 In this paper, we considered uplink communication, focusing on the improvement of spectral efficiency (SE) for millimeter wave (mmWave) multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) systems.
Yinhao Zhang +5 more
doaj +1 more source
Visual grouping in menu interfaces [PDF]
, 2015 Menu interfaces often arrange options into semantic groups. This semantic structure is then usually conveyed to the user by supplementary visual grouping cues.
Brumby, DP, Zhuang, S
core +1 more source
Adaptive User Grouping Based on EVM Prediction for Efficient & Robust Massive MIMO in TDD
IEEE Access, 2019 Massive multiple-input, multiple-output (Ma-MIMO) offers significant capacity improvements for sub-6GHz wireless access. Evaluating the practicalities for real-world deployments and identifying solutions is the next critical step in the roll-out of this ...
Wael Boukley Hasan +4 more
doaj +1 more source
User Grouping for Hybrid VLC/RF Networks With NOMA: A Coalitional Game Approach
IEEE Access, 2019 Recently, visible light communication (VLC) networks have emerged as a promising alternative for indoor data access, due to high data rate, low implementation cost, and immunity to radio frequency (RF) interference.
Vasilis K. Papanikolaou +2 more
doaj +1 more source
A Physical Layer Multicast Precoding and Grouping Scheme for Bandwidth Minimization
IEEE Access, 2021 Physical layer multicasting exploits multiple antennas at the transmitter side to deliver a common message to a group of $K$ users. To this end, two formulations have been well addressed in the literature: i) the max-min-fair criterion, which maximizes
Francisco J. Martin-Vega +3 more
doaj +1 more source