Results 51 to 60 of about 995,967 (198)

DFT codebook-based hybrid precoding for multiuser mmWave massive MIMO systems

open access: yesEURASIP Journal on Advances in Signal Processing, 2020
In millimeter wave (mmWave) massive MIMO (multiple-input multiple-output) systems, it is difficult to apply conventional digital precoding techniques due to hardware constraints.
Yu Huang   +3 more
doaj   +1 more source

On the effect of shadowing correlation and pilot assignment on hybrid precoding performance for cell-free mmWave massive MIMO UDN system

open access: yesICT Express, 2021
One of promising transmission technologies for beyond-5G wireless communication is cell-free massive MIMO where all the access nodes (ANs) cooperate to coherently serve all the user equipments (UEs).
Seung-Eun Hong
doaj   +1 more source

Rigorous Performance Characterisation of AI‐Enhanced 6G Underwater Optical Wireless Networks: Link Budget Correction and Empirical Gain Validation

open access: yesIET Optoelectronics, Volume 20, Issue 1, January/December 2026.
This document presents a revised mathematical framework for underwater 6G networks addressing common mistakes in research that result in overly optimistic outcomes. By employing established physical models and stringent technical limitations, we create a self‐validated benchmark of 776 Mbps over a distance of 44.8 m in clear ocean water with ...
Yousuf Islam   +2 more
wiley   +1 more source

Confidential communications technique based on message block precoder in multi-user MIMO systems

open access: yesTongxin xuebao, 2012
For confidential communications in a multi-user MIMO wiretap channel,though no information regarding the illegitimate receiver was presumed at the transmitter,an artificial interference and a precoding technique based on message block were proposed ...
Yao ZHU   +3 more
doaj   +2 more sources

Performance Analysis of Precoding Based on Massive MIMO System

open access: yesMATEC Web of Conferences, 2015
In order to improve the system performance, the authors consider a single-cell multiuser Massive MIMO downlink time-division duplex (TDD) system for the imperfect channel state information (CSI).
Li Yi, Wang Junxuan, Gao Zhenzhen
doaj   +1 more source

Fast Converging Iterative Precoding for Massive MIMO Systems: An Accelerated Weighted Neumann Series-Steepest Descent Approach

open access: yesIEEE Access, 2020
For massive multiple-input multiple-output (MIMO) systems, linear precoding is preferable to nonlinear precoding for better performance-complexity trade-off.
Qian Deng   +5 more
doaj   +1 more source

Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding [PDF]

open access: yes, 2010
The mobile WiMAX standard (802.16e) uses multiple-input multiple-output (MIMO) limited feedback linear precoding to exploit the channel state information at the transmitter.
Nix, AR, Tran, T, Doufexi, A
core   +1 more source

Genetic Algorithm‐Optimized Recurrent Neural Network for Channel Estimation in RIS‐Aided MIMO System With Rake Receiver

open access: yesJournal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.
The integration of reconfigurable intelligent surfaces (RIS) into multiple‐input multiple‐output (MIMO) systems offers transformative potential for enhancing spectral efficiency and mitigating channel impairments. However, efficient and accurate channel estimation (CE) remains a critical challenge due to multipath propagation, high dimensionality, and ...
Kevin M. Mwongera   +3 more
wiley   +1 more source

Comparing GFDM With OFDM for Use in 6G Communication From a New Perspective

open access: yesJournal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.
The most important challenges facing 6G communication systems are the large amount of data and low latency as compared to previous generations. Therefore, it has become necessary to use advanced technologies to meet the requirements of 6G wireless communication systems.
Mohammed Azher Therib   +2 more
wiley   +1 more source

Low Complexity Hybrid Precoding for Broadband mmWave Massive MIMO Systems

open access: yesAdvances in Electrical and Computer Engineering, 2018
Hybrid precoding becomes a candidate for Millimeter wave (mmWave) massive MIMO (Multiple-Input and Multiple-Output) systems because it can extremely reduce power consumption and high costs.
HUANG, Y., LIU, C., SONG, Y.
doaj   +1 more source

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