Results 11 to 20 of about 61,754 (211)
IET Networks, EarlyView., 2023 We utilise a metaheuristic optimisation method, inspired by nature, called the Lévy‐flight firefly algorithm (LFA), to tackle the power regulation and user grouping in the NOMA systems. Abstract The non‐orthogonal multiple access strategies have shown promise to boost fifth generation and sixth generation wireless networks' spectral efficiency and ...
Zaid Albataineh +4 more
wiley +1 more source
IET Microwaves, Antennas & Propagation, 2021 A method to significantly increase the gain and isolation of a wideband multiple‐input multiple‐output (MIMO) antenna using metamaterial structures is reported.
Farzad Khajeh‐Khalili +3 more
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Correlation in MIMO Antennas [PDF]
Electronics, 2020 Multiple-input multiple-output (MIMO) antennas are commonly evaluated by using the correlation coefficient. However, the correlation has several different definitions and calculation methods, and this misleads the real performance of the MIMO antennas.
Naoki Honma, Kentaro Murata
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Multiplexing Efficiency of MIMO Antennas [PDF]
IEEE Antennas and Wireless Propagation Letters, 2011 A simple and intuitive metric of multiplexing efficiency is proposed for evaluating the performance of multiple-input-multiple-output (MIMO) antennas in the spatial multiplexing mode of operation. Apart from gaining valuable insights into the impact of antenna efficiency, efficiency imbalance, and correlation on multiplexing performance, the metric is ...
Tian, Ruiyuan +2 more
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Fundamental Bounds on MIMO Antennas [PDF]
IEEE Antennas and Wireless Propagation Letters, 2018 Antenna current optimization is often used to analyze the optimal performance of antennas. Antenna performance can be quantified in e.g., minimum Q-factor and efficiency. The performance of MIMO antennas is more involved and, in general, a single parameter is not sufficient to quantify it.
Ehrenborg, Casimir, Gustafsson, Mats
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ETRI Journal, 2023 In this study, we developed a co-located and space-shared multiple-input multiple-output (MIMO) antenna module with a modular design and high integration level.
Longyue Qu, Haiyan Piao, Guohui Dong
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User Effect on Antenna Cluster Based MIMO Antenna [PDF]
Antennas and Propagation Conference 2019 (APC-2019), 2019 Peer ...
Hannula, Jari Matti +5 more
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Scaling up MIMO: Opportunities and Challenges with Very Large Arrays [PDF]
, 2012 This paper surveys recent advances in the area of very large MIMO systems. With very large MIMO, we think of systems that use antenna arrays with an order of magnitude more elements than in systems being built today, say a hundred antennas or more ...
Buon Kiong Lau +19 more
core +2 more sources
IEEE Access, 2020 This paper presents a twelve-port multiple-input multiple-output (MIMO) antenna system for multi-mode 4G/5G smartphone applications. Characteristic mode analysis (CMA) is used to illustrate the operation principle and optimize the geometrical structure ...
Jian Dong, Shan Wang, Jinjun Mo
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Highly Compact 4 × 4 Flower-Shaped MIMO Antenna for Wideband Communications
Applied Sciences, 2023 This paper introduces an MIMO antenna with a highly compact size of 30 mm width and 30 mm length. Four symmetrical MIMO antenna radiators are utilized with decoupling stubs in the top and bottom planes of the substrate to improve the isolation level. The
Wael A. E. Ali, Rowan A. Ibrahim
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