Results 51 to 60 of about 789 (166)

The Cell-Free Networks Enhancement by Relays Implementa-tion [PDF]

International Journal of Telecommunications, 2023
Data rates that users can sustain in both uplink and downlink can be increased because of multiple input multiple output (MIMO) technology. MIMO is therefore a new technology for 5G networks and beyond.
doaj   +1 more source

Asynchronous Cell-Free Massive MIMO With Rate-Splitting

IEEE Journal on Selected Areas in Communications, 2023
In practical cell-free (CF) massive multiple-input multiple-output (MIMO) networks with distributed and low-cost access points, the asynchronous arrival of signals at the user equipments increases multi-user interference that degrades the system performance. Meanwhile, rate-splitting (RS), exploiting the transmission of both common and private messages,
Jiakang Zheng, Jiayi Zhang 0001, Julian Cheng, Victor C. M. Leung, Derrick Wing Kwan Ng, Bo Ai 0001   +5 more
openaire   +2 more sources

Integrated LEO Constellation and In‐Cabin Distribution System for Continuous Aircraft 5G Connectivity

International Journal of Satellite Communications and Networking, Volume 44, Issue 5, Page 594-606, September/October 2026.
ABSTRACT The integration of low Earth orbit (LEO) satellite constellations with commercial aircraft communication systems presents critical challenges in maintaining continuous connectivity during dynamic flight conditions. Current geostationary satellite systems suffer from high round‐trip latency ( > 500 ms) and inadequate coverage at high latitudes,
Raúl Parada, Victor Monzon Baeza, Carlos Horcajo Fernández de Gamboa, Rocío Serrano Camacho, Carlos Monzo   +4 more
wiley   +1 more source

Optical Phased Arrays on Photonic Integrated Circuit Platforms: Challenges, Opportunities, and Future Applications

Nanophotonics, Volume 15, Issue 14, 27 July 2026.
Integrated optical phased arrays are emerging as scalable engines for solid‐state beam steering and programmable wavefront control. This Review maps the field from beam‐steering principles and core building blocks to material platforms, system‐level bottlenecks, and application frontiers, highlighting how heterogeneous integration, aperiodic ...
Jingwei Li, Yuyuan Han, Aoxiang Chen, Pengpeng Li, Xinglin Zhu, Guanbao Zhao, Luohan Peng, Huaibin Zheng   +7 more
wiley   +1 more source

Effective Channel Gain-Based Access Point Selection in Cell-Free Massive MIMO Systems

IEEE Access, 2020
In this paper, we investigate the selection problem of access points (APs) in cell-free massive multiple-input multiple-output (MIMO) systems, where APs equipped with a large number of antennas are geographically distributed over a wide area with no cell
Hieu Trong Dao, Sunghwan Kim
doaj   +1 more source

The state of the art in beyond 5G distributed massive multiple-input multiple-output communication system solutions [version 1; peer review: 1 approved, 2 approved with reservations]

Open Research Europe, 2022
Beyond fifth generation (5G) communication systems aim towards data rates in the tera bits per second range, with improved and flexible coverage options, introducing many new technological challenges in the fields of network architecture, signal ...
F. Ponzini, A. Filippi, U. Johannsen, D. Kruglov, E. Meyer, R. Argaez-Ramirez, M. Krivic, A. Briseno Ojeda, Y. Zhang, K. Alekseev, K. Smirnova, B. Cimbili, M. Safari Mugisho, Y. Dang, N. Farid, M. Ensan, M. Shahid, H. Bao, J. Banar, U. Gustavsson, M. Matters-Kammerer, T. Zwick, F. Demuynck, C. Fager, M. Acar, M. Ivashina, M. van der Heijden, M. Hasselblad, D. Caratelli, K. Eriksson, A.B. Smolders, M. Tanveer, C. Ulusoy, R. Maaskant, M. Johannson, D. Floriot, R. Quay, L.A. Bronckers, M. Bao, M.C. van Beurden, J. Fridén, C. Kolitsidas, B.P. de Hon, Hamdi Joudeh, D. Blanco, T. Eriksson, F.M.J. Willems   +46 more
doaj   +1 more source

CNN‐DDQN Spatial Learning for Fractional Frequency Reuse Optimization in 5G Heterogeneous Networks

Engineering Reports, Volume 8, Issue 7, July 2026.
This study proposes a spatially aware DRL framework that uses multichannel network‐state tensors and a lightweight CNN‐DDQN architecture to capture interference patterns and user clustering in 5G heterogeneous networks (HetNets). The model is computationally efficient with only 7361 trainable parameters, achieving 115× faster execution and < 10 ms ...
Christian Onu, Abdulwaheed Musa, Olalekan Ogunbiyi, Lambe Mutalub Adesina, Bilkisu Jimada‐Ojuolape, Monsurat Balogun, Abdurrhaman Ademola Isa, Aliyu Ahmed, Ishmael Zibani, Adamu Murtala Zungeru   +9 more
wiley   +1 more source

Performance of Multiuser Downlink Cell-Free Massive MIMO Systems With Hard Deadlines

IEEE Access, 2022
Cell-free massive MIMO (mMIMO) is expected to be a novel network architecture to support massive connections, ultra-high transmission rate, and ultra-reliability low-latency transmission.
Le Tan, Ziyang Zhang, Dongming Wang
doaj   +1 more source

Beyond 5G and Non‐terrestrial Network (NTN) Integrated Architecture: Access Challenges for Expanding Artificial Intelligence of Things (AIoT)

International Journal of Satellite Communications and Networking, Volume 44, Issue 4, Page 378-393, July/August 2026.
ABSTRACT This study analyzes the architecture of the beyond 5G‐NTN (Non‐terrestrial Network) integrated network and presents the technical, legal, and regulatory challenges and considerations for expanding the Artificial Intelligence of Things (AIoT) ecosystem.
Byung Woon Kim, Ga Eun Choi
wiley   +1 more source

A Joint Channel Modeling, Parameter Estimation and Geometry‐Based Indoor Localization for 5G Systems

Transactions on Emerging Telecommunications Technologies, Volume 37, Issue 6, June 2026.
We propose an end‐to‐end method to accurately localize mobile stations in indoor scenarios, such as those found in Industry 4.0. To this end, we jointly perform wireless channel modeling considering mmWave and MIMO technologies, parameter estimation in 3D, and simple and fine‐grained geometry‐based localization.
Paulo Francisco da Conceição, Rodrigo Pinto Lemos, Flávio Geraldo Coelho Rocha   +2 more
wiley   +1 more source