Results 61 to 70 of about 4,006 (196)

Dynamic Multifunctional Metasurfaces Based on Passive Cascade Structure

open access: yesElectron, Volume 4, Issue 2, May 2026.
A dynamic multifunctional metasurface is proposed in this paper. Unlike mainstream multifunctional metasurface based on programmable metasurfaces, it consists of two passive metasurfaces, presenting a significant cost advantage. By controlling the displacement, different functions such as beam steering, focusing, and OAM wave generation can be realized
Xiangming Wu   +5 more
wiley   +1 more source

Contribution to the characterization and evaluation of multiple antenna systems for communications: prototyping, propagation and antenna perspective

open access: yes, 2007
The advent of new services and applications in mobile and wireless communications, most of them based on high data rates, is helping to reactivate the Telecommunication market.
García García, Laura
core   +1 more source

A spatial interference minimization strategy for the correlated LTE downlink channel [PDF]

open access: yes, 2010
In a downlink transmission, users can benefit from the high capacity gain achieved by transmitting independent data streams from multiple antennas to multiple users sharing the same physical time-frequency resources.
Nordin, R   +5 more
core   +1 more source

Mobile Base Station User Scheduling Optimization Algorithm Based on Graph Neural Network

open access: yesEngineering Reports, Volume 8, Issue 5, May 2026.
Multicell and multiuser downlink joint transmission wireless communication system. ABSTRACT With the upgrading of mobile communication technology and the rise of the mobile communications industry, the mobile Internet is booming. However, mobile Internet networks are facing the next technological revolution due to the explosive growth of mobile devices,
Jingya Zhang
wiley   +1 more source

Real Coded Genetic Algorithm with Enhanced Abilities for Adaptation Applied to Optimisation of MIMO Systems [PDF]

open access: yes, 2012
This article presents an investigation of real coded Genetic Algorithm Blend Crossover Alpha modification, with enhanced ability for adaptation, applied to minimisation of transmit power in multiple-input multiple-output (MIMO) systems beamforming.
Iliev, Georgi   +2 more
core  

Area spectral efficiency of soft-decision space–time–frequency shift-keying-aided slow-frequency-hopping multiple access [PDF]

open access: yes, 2012
Slow-frequency-hopping multiple access (SFHMA) can provide inherent frequency diversity and beneficially randomize the effects of cochannel interference.
Ngo, Hoang Anh   +3 more
core   +1 more source

Energy efficient RF chains selection based on integrated Hungarian and genetic approaches for uplink cell‐free millimetre‐wave massive MIMO systems

open access: yesIET Communications
The purpose of this work is to explore the decrease of total used power in cell‐free millimetre‐wave (mm‐Wave) massive multiple‐input multiple‐output (MIMO) systems, which can be regarded an essential technology for future wireless generations to improve
Abdulrahman Al Ayidh   +1 more
doaj   +1 more source

Mobile WiMAX: multi-cell network evaluation and capacity optimization [PDF]

open access: yes, 2008
The performance of a mobile WiMAX system is highly dependent on the application environment. Local clutter has a significant impact on the path loss exponent and the observed multipath statistics.
Nix, AR, Bian, YQ, Y. Q. Bian, A. R. Nix
core   +1 more source

MIMO Assisted Space-Code-Division Multiple-Access: Linear Detectors and Performance over Multipath Fading Channels

open access: yes, 2006
In this contribution we propose and investigate a multiple-input multiple-output space-division, code-division multiple-access (MIMO SCDMA) scheme. The main objective is to improve the capacity of the existing DS-CDMA systems, for example, for supporting
Yang, L.-L.
core  

Iterative Joint Channel Estimation and Multi-User Detection for Multiple-Antenna Aided OFDM Systems

open access: yes, 2007
Multiple-Input-Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems have recently attracted substantial research interest. However, compared to Single-Input-Single-Output (SISO) systems, channel estimation in the MIMO scenario
Akhtman, J, Jiang, M, Hanzo, L.
core  

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