Results 81 to 90 of about 4,393 (215)

Tracing Three Decades of Low Earth Orbit Satellite Communication Development: A Bibliometric and Main Path Analysis of Network Architectures, Protocol Evolution, and Emerging Intelligent Services

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite communication systems have evolved into a critical component of global broadband networks, enabling wide‐area connectivity, IoT services, and intelligent multilayer satellite–terrestrial integration. Despite rapid advancements in constellation deployment, routing mechanisms, resource management, and LEO–5G/6G ...
Wei‐Hao Su, Ya‐Chen Chuang, Long‐Sheng Chen   +2 more
wiley   +1 more source

Hybrid beamforming for single-user MIMO with partially connected RF architecture [PDF]

, 2017
Hybrid analog-digital beamforming has been recognized as a promising solution for a practical implementation of massive multiple-input multiple-output (MIMO) systems based on millimeter-wave technology.
Harri Pennanen, Tervo, Nuutti, Moilanen, Aleksi, Latva-aho, Matti, Aleksi Moilanen, Tölli, Antti, Matti Latva-aho, Mohammad Majidzadeh, Antti Tolli, Pennanen, Harri, Majidzadeh, Mohammad, Nuutti Tervo   +11 more
core   +3 more sources

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

International Journal of Satellite Communications and Networking, EarlyView.
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 ...
Raúl Parada, Victor Monzon Baeza, Carlos Horcajo Fernández de Gamboa, Rocío Serrano Camacho, Carlos Monzo   +4 more
wiley   +1 more source

Low‐Complexity Hybrid Beamforming for LEO Satellites: Beam Update Rate Analysis and Advanced Adaptive Precoding

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite constellations offer unprecedented opportunities for global broadband connectivity but pose significant beamforming challenges due to rapid platform motion and stringent onboard hardware constraints. Fully digital architectures, while optimal in theory, remain impractical for satellite payloads, motivating ...
Mohammad Momani, Thomas Delamotte, Andreas Knopp   +2 more
wiley   +1 more source

HYBRID BEAMFORMING FOR SINGLE CARRIER MMWAVE MIMO SYSTEMS [PDF]

2018 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2018
Hybrid analog and digital beamforming (HBF) has been recognized as an attractive technique offering a tradeoff between hardware implementation limitation and system performance for future broadband millimeter wave (mmWave) communications. In contrast to most current works focusing on the HBF design for orthogonal frequency division multiplexing based ...
Tian Lin 0004, Jiaqi Cong, Yu Zhu 0002
openaire   +2 more sources

Low-Complexity and Robust Quantized Hybrid Beamforming and Channel Estimation [PDF]

, 2019
Hybrid beamforming with phase shifters and switches has been identified as a low-cost and energy-efficient approach to harness the benefits of massive multiple-input multiple-output (MIMO) systems.
Sellathurai, M, Payami, Sohail, Sellathurai, Mathini; id_orcid, Payami, S, Masouros, C, Masouro, Christos   +5 more
core   +1 more source

Dynamic Cell Division for Interference Management in Satellite Direct‐to‐Cell Systems

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Direct‐to‐cell (D2C) connectivity enables future non‐terrestrial networks to provide service directly to standard terrestrial user equipment (UE) when terrestrial networks (TN) are unavailable. In this work, the satellite system is considered as a secondary network that supplements existing TN coverage while minimizing interference to the ...
Satya Chan, Hee Wook Kim, Bon‐Jun Ku, Daesub Oh   +3 more
wiley   +1 more source

Beamforming With Hybrid Reconfigurable Parasitic Antenna Arrays

IEEE Transactions on Wireless Communications
A parasitic reconfigurable antenna array is a low-power approach for beamforming using passive tunable elements. Prior work on reconfigurable antennas in communication theory is based on ideal radiation pattern abstractions. It does not address the problem of physical realizability.
Nitish Vikas Deshpande 0001, Miguel Rodrigo Castellanos, Saeed R. Khosravirad, Jinfeng Du, Harish Viswanathan, Robert W. Heath Jr.   +5 more
openaire   +2 more sources

ANALISA KOMUNIKASI MILIMETER-WAVE BERBASIS HYBRID BEAMFORMING [PDF]

, 2019
Beberapa tahun belakangan ini pertumbuhan telekomunikasi meningkat pesat, sehingga dibutuhkan teknologi baru untuk menangani masalah tersebut. Salah satu teknologi pada komunikasi wireless dimasa yang akan datang adalah teknologi mmwave. Banyaknya antena
ULFAH SULISTIYANI
core  

GENERALIZED INVERSE BEAMFORMING INVESTIGATION AND HYBRID ESTIMATION [PDF]

, 2020
Conventional beamforming, among the several techniques that can be used for noise source localization, has been widely used in complex problems, including aeroacoustics applications.
W De Roeck, P Sas, P A G Zavala, J R F Arruda, K Janssens, W Desmet   +5 more
core