Results 21 to 30 of about 7,555 (184)

Study of Clustering Solutions for Scalable Cell-Free Massive MIMO

IEEE Access, 2023
In response to the requirements of 5G and beyond, cell-free systems have emerged to ensure uniform service throughout the area. However, the idea of having no cells leads to a considerably large monolithic system, which is not scalable.
Danaisy Prado-Alvarez, Daniel Calabuig, Jose F. Monserrat, Samer Bazzi, Wen Xu   +4 more
doaj   +1 more source

Energy‐efficient data transmission technique for wireless sensor networks based on DSC and virtual MIMO

ETRI Journal, 2020
In a wireless sensor network (WSN), the data transmission technique based on the cooperative multiple‐input multiple‐output (CMIMO) scheme reduces the energy consumption of sensor nodes quite effectively by utilizing the space‐time block coding scheme ...
Manish Kumar Singh, Syed Intekhab Amin
doaj   +1 more source

Isolation Enhancement of Wide-Band MIMO Array Antennas Utilizing Resistive Loading

IEEE Access, 2019
In this paper, we propose the use of resistor-loaded paired parallel-coupled resonators (PCRs) for mutual coupling reduction and isolation enhancement in wideband MIMO array antennas.
Jung-Dong Park, Muhibur Rahman, Hsiang Nerng Chen   +2 more
doaj   +1 more source

A Dual-Band Eight-Element MIMO Antenna Array for Future Ultrathin Mobile Terminals

Micromachines, 2022
An ultrathin dual-band eight-element multiple input–multiple output (MIMO) antenna operating in fifth-generation (5G) 3.4–3.6 GHz and 4.8–5 GHz frequency bands for future ultrathin smartphones is proposed in this paper.
Chuanba Zhang, Zhuoni Chen, Xiaojing Shi, Qichao Yang, Guiting Dong, Xuanhe Wei, Gui Liu   +6 more
doaj   +1 more source

Decoding Naturalistic Episodic Memory with Artificial Intelligence and Brain‐Machine Interface

Advanced Science, EarlyView.
Episodic memory weaves together what, where, and when of experience into a personal narrative. Cutting‐edge AI models may decode this intricate process in real‐life settings, revealing how neural activity encodes naturalistic memories. By merging AI with brain–machine interfaces, researchers are edging closer to mapping and even engineering memory ...
Dong Song
wiley   +1 more source

An Energy Efficiency Maximization Scheme for the Wireless Information and Power Transfer System With MU-MIMO Uplink Access

IEEE Access, 2018
In this paper, we consider the maximization of energy efficiency in the wireless information and power transfer system with multi-user multiple-input/multiple-output (MU-MIMO) as its uplink multiple access technique.
Su Pan, Jiannan Chen, Yuqing Chen, Xixia Sun   +3 more
doaj   +1 more source

Design of Wideband Decoupling Antenna Pairs for 5G Portable Devices at N77/N78/N79 Bands

Micromachines, 2022
We proposed an antenna pair that is applicable for mobile terminals: a type of coupling feed planar antenna that has a size of 28×6 mm2, a wide band, coupling suppression and compact size.
Kaiwen Du, Yongshun Wang, Lijun Zhang, Yao Hu   +3 more
doaj   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

On Distributed Radar Networks: Signal Model, Analysis, and Signal Processing

IEEE Journal of Microwaves
A key aspect of the imaging capability of radar systems is the angular resolution, which is determined by the aperture size of the antenna array. Therefore technologies such as MIMO and especially radar networks consisting of multiple independent MIMO ...
Vinzenz Janoudi, Pirmin Schoeder, Timo Grebner, Nils Appenrodt, Juergen Dickmann, Christian Waldschmidt   +5 more
doaj   +1 more source

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

Advanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source