Results 71 to 80 of about 4,370 (213)

Low Complexity and Robust Codebook-Based Analog Beamforming for Millimeter Wave MIMO Systems

IEEE Access, 2017
Millimeter-wave (mm-Wave) MIMO systems have been proposed to achieve higher spectral efficiency via the hybrid beamforming structure, which consists of analog beamforming and digital beamforming.
Yong Niu, Ziqi Feng, Min Chen, Yong Li, Zhangdui Zhong, Bo Ai   +5 more
doaj   +1 more source

Hybrid Beamforming for Multi-User Millimeter-Wave Heterogeneous Networks

, 2022
Millimeter-wave (mmWave) communications are a critical technique with next-generation network characteristics such as ultra-dense small cells can meet the skyrocketing demand for mobile data. Hybrid precoding, which combines analog and digital processing
Tao Chen, Zhannan Li
core   +1 more source

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

Deep Learning-based Compensation for Doppler Shifts in Hybrid Beamforming for mmWave Communication

Journal of Telecommunications and Information Technology
Millimeter-wave (mmWave) communication is a key enabler of 5G and future wireless systems, providing vast bandwidth for high-speed data transfers.
Kartik Ramesh Patel, Sanjay Dasrao Deshmukh   +1 more
doaj   +1 more source

Energy‐efficiency hybrid beamforming architecture design for MIMO network

Electronics Letters, 2022
This letter investigates the hybrid beamforming architecture design for MIMO network, where the connection between each antenna and each radio frequency chain is controlled by a switch. The optimization of the switch‐controlled connection state vector is
Kuo Cao, Jiao Zhang, Jun Xiong
doaj   +1 more source

Tensor-Based Joint Beamforming with Ultrasonic and RIS-Assisted Dual-Hop Hybrid FSO mmWave Massive MIMO of V2X

Photonics, 2023
Reconfigurable intelligent surface (RIS)-assisted millimeter-wave (mmWave) communication systems relying on hybrid beamforming structures are capable of achieving high spectral efficiency at a low hardware complexity and with low power consumption ...
Xiaoping Zhou, Zhaonan Zeng, Jiehui Li, Zhen Ma, Le Tong   +4 more
doaj   +1 more source

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

A Flexible Low-Cost Hybrid Beamforming Structure for Practical Beamforming Applications [PDF]

2019 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT), 2019
In this paper, a simplified yet flexible half-duplex hybrid beamforming (HBF) architecture along with the adaptive beam scanning and direction-finding methodology for the 360° HBF system has been proposed. The structure is constructed using up to 4 units of n × 4 antenna arrays with choice of gain and coverage sector, which is powered by only 4 RF ...
Tan, Moh Chuan, Li, Minghui, Abbasi, Qammer H., Imran, Muhammad   +3 more
openaire   +1 more source

Hybrid Beamforming Design for Millimeter Wave Massive MIMO Communications [PDF]

, 2021
Wireless connectivity is a key driver for the digital transformation that is changing how people communicate, do business, consume entertainment and search for information.
Martignago Zilli, Guilherme
core