Results 31 to 40 of about 168,252,286 (288)
MODELLING OF THE FUNCTIONAL UNITS OF THE TRANSMITTING AND RECEIVING RADIO PATHS OF TERAHERTZ
Information and Telecommunication Sciences, 2016 Background. One of the promising applications of terahertz technology are communication systems and telecommunications. In particular, it provides for the creation of fundamentally new in size, noise immunity and energy efficiency devices and ...
Mykhailo Ilchenko +4 more
doaj +1 more source
Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review
Sensors, 2020 High Frequency (HF) communications through ionospheric reflection is a widely used technique specifically for maritime, aeronautical, and emergency services communication with remote areas due to economic and management reasons, and also as backup system.
Marcos Hervás +2 more
doaj +1 more source
Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication
Advanced Materials Technologies, EarlyView.The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting +5 more
wiley +1 more source
Direct Wideband Coherent Localization by Distributed Antenna Arrays
Sensors, 2019 We address wideband direct coherent localization of a radio transmitter by a distributed antenna array in a multipath scenario with spatially-coherent line-of-sight (LoS) signal components.
Nenad Vukmirović +3 more
doaj +1 more source
Advanced Materials Technologies, EarlyView.Dense tactile streams from across the humanoid body converge on collide in a central wiring and data bottleneck. By relocating computation closer to and then into the skin itself, near‐ and in‐sensor architectures, together with neuromorphic computing, chart a path toward perception‐native electronic skin, in which the conversion of stimulus into ...
Mijin Kim +6 more
wiley +1 more source
IEEE Open Journal of the Communications SocietyFirst responder and mission-critical IoT applications require infrastructure-less, energy-efficient ad-hoc networks. We present MRAM, a custom handheld platform featuring a multi-radio mesh system that integrates long-range Wi-Fi and HaLow technologies ...
Kavin Kumar Thangadorai +3 more
doaj +1 more source
A Radio Channel Model for D2D Communications Blocked by Single Trees in Forest Environments
Sensors, 2019 In this paper we consider the D2D (Device-to-Device) communication taking place between Wireless Sensor Networks (WSN) elements operating in vegetation environments in order to achieve the radio channel characterization at 2.4 GHz, focusing on the radio ...
Imanol Picallo +8 more
doaj +1 more source
IEEE Access, 2021 Wireless communications refer to data transmissions in unguided propagation media through the use of wireless carriers such as radio frequency (RF) and visible light (VL) waves.
Hisham Abuella +6 more
doaj +1 more source
Advanced Materials Technologies, EarlyView.Transparent microelectrode arrays enable simultaneous optical and electrical electrophysiology with high spatiotemporal resolution, allowing multimodal observations of dynamic biological systems. Advances in materials and device architectures improve device performance by addressing key trade‐offs between optical transparency, impedance, and ...
Michael Abraham Listyawan +6 more
wiley +1 more source
EURASIP Journal on Wireless Communications and Networking, 2018 Optical wireless communications (OWC) has emerged as a strong candidate for wireless communications, due to the capacity limitation in the radio frequency (RF) spectrum.
Hasan Farahneh +2 more
doaj +1 more source