Results 11 to 20 of about 65,120 (254)
Telecom, 2022 In this paper, we propose a hybrid beamforming architecture with constant phase shifters (CPSs) for uplink cell-free millimetre-wave (mm-Wave) massive multiple-input multiple-output (MIMO) systems based on exploiting antenna selection to reduce power ...
Abdulrahman Al Ayidh +4 more
doaj +1 more source
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
Advances in MIMO Antenna Design for 5G: A Comprehensive Review
Sensors, 2023 Multiple-input multiple-output (MIMO) technology has emerged as a highly promising solution for wireless communication, offering an opportunity to overcome the limitations of traffic capacity in high-speed broadband wireless network access.
Tej Raj +3 more
doaj +1 more source
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
openaire +1 more source
Advancing 5G Connectivity: A Comprehensive Review of MIMO Antennas for 5G Applications
International Journal of Antennas and Propagation, 2023 The review focuses on the emergence of 5G wireless communication and the need for multiple-input multiple-output antennas to support high-speed communication systems.
Poonam Tiwari +5 more
doaj +1 more source
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
openaire +3 more sources
Dual-band MIMO coplanar waveguide-fed-slot antenna for 5G communications
Heliyon, 2021 This paper presents two new designs of MIMO dual band coplanar waveguide (CPW)-fed-slot antennas operating in the 5G frequency band (28 and 38 GHz). The first antenna is an XX MIMO antenna and the second antenna is an XY MIMO antenna.
Amjad Omar +3 more
doaj +1 more source
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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A novel approach to design compact, wideband, and high-gain circularly polarized MIMO antenna using dual-polarized elements and hybrid couplers. [PDF]
Sci RepTran H +4 more
europepmc +3 more sources
User Effect on Antenna Cluster Based MIMO Antenna [PDF]
Antennas and Propagation Conference 2019 (APC-2019), 2019 Peer ...
Hannula, Jari Matti +5 more
openaire +3 more sources