Results 51 to 60 of about 24,859 (195)
Channel Estimation for mmWave Massive MIMO Based Access and Backhaul in Ultra-Dense Network
, 2016 Millimeter-wave (mmWave) massive MIMO used for access and backhaul in ultra-dense network (UDN) has been considered as the promising 5G technique. We consider such an heterogeneous network (HetNet) that ultra-dense small base stations (BSs) exploit ...
Dai, Linglong +2 more
core +1 more source
A New Look at Physical Layer Security, Caching, and Wireless Energy Harvesting for Heterogeneous Ultra-dense Networks [PDF]
, 2017 Heterogeneous ultra-dense networks enable ultra-high data rates and ultra-low latency through the use of dense sub-6 GHz and millimeter wave (mmWave) small cells with different antenna configurations.
Heath Jr, Robert W. +4 more
core +3 more sources
International Journal of Satellite Communications and Networking, EarlyView.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
Millimeter Wave Communications with Reconfigurable Antennas
, 2018 The highly sparse nature of propagation channels and the restricted use of radio frequency (RF) chains at transceivers limit the performance of millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems. Introducing reconfigurable antennas to
He, Biao, Jafarkhani, Hamid
core +1 more source
Advanced Optical Materials, Volume 14, Issue 1, 9 January 2026.A diffractive neural networkdesigned metasurface operating at 86 GHz generates multiple holographic patterns by controlling the phase of subwavelength unit cells. A phase‐smoothing regularization mitigates mutual coupling, enabling accurate multifunctional wavefront shaping.
Damián Rodríguez‐Trujillo +5 more
wiley +1 more source
Social Development & SecurityPurpose: The deployment of the fifth-generation (5G) of wireless communications that was launched worldwide in 2020 is entering its final stage in some countries.
Mykola Servetnyk, Ruslan Servetnyk
doaj +1 more source
A New Statistical Channel Model for Emerging Wireless Communication Systems
IEEE Open Journal of the Communications Society, 2020 A new composite fading model is introduced. This shadowed Beaulieu-Xie model is developed to characterize wireless communication in an environment with an arbitrary number of line-of-sight and non-line-of-sight signals, in contrast to the existing ...
Adebola Olutayo +2 more
doaj +1 more source
Wireless Powered Dense Cellular Networks: How Many Small Cells Do We Need? [PDF]
, 2017 This paper focuses on wireless powered 5G dense cellular networks, where base station (BS) delivers energy to user equipment (UE) via the microwave radiation in sub-6 GHz or millimeter wave (mmWave) frequency, and UE uses the harvested energy for uplink ...
Heath, Robert W. +3 more
core +1 more source
Phase‐Changing Vanadium Oxides for Electromagnetic Radiation Management
Small Science, Volume 6, Issue 1, January 2026.Vanadium dioxide's reversible insulator‐to‐metal transition near room temperature enables ultrafast, broadband electromagnetic modulation from ultraviolet to radiofrequencies. With femtosecond switching speeds and cycling endurance exceeding 100 million cycles, VO2 metasurfaces achieve tuneable absorption, beam steering, and polarisation control. These
Mohammad Taha +2 more
wiley +1 more source
FDD Channel Estimation Via Covariance Estimation in Wideband Massive MIMO Systems
Sensors, 2020 A method for channel estimation in wideband massive Multiple-Input Multiple-Output systems using hybrid digital analog architectures is developed.
José P. González-Coma +3 more
doaj +1 more source