Results 51 to 60 of about 9,993 (193)
Sensors, 2022 Physical layer secret key generation (PLKG) is a promising technology for establishing effective secret keys. Current works for PLKG mostly study key generation schemes in ideal communication environments with little or even no signal interference.
Shengjie Liu +7 more
doaj +1 more source
IEEE Transactions on Wireless Communications, 2023 This paper studies the estimation of cascaded channels in passive intelligent reflective surface (IRS)- aided multiple-input multiple-output (MIMO) systems employing hybrid precoders and combiners. We propose a low-complexity solution that estimates the channel parameters progressively. The angles of departure (AoDs) and angles of arrival (AoAs) at the
Khawaja Fahad Masood +4 more
openaire +3 more sources
Advanced Energy Materials, EarlyView.This work uncovers the atomic‐scale origins of exceptional HER performance in amorphous Ni(OH)2 nanosheets by combining atom probe tomography, DFT simulations, and operando spectroscopy. We identify distinct short‐range‐order motifs that accelerate water dissociation, proton transport, and hydrogen adsorption. Embedding Pt single atoms further enhances
Xin Geng +4 more
wiley +1 more source
Advanced Intelligent Discovery, EarlyView.A machine learning‐guided self‐driving laboratory screened over 500 nickel‐based layered double‐hydroxide catalysts for alkaline oxygen evolution. Out of the eight metals, the robot uncovered a quaternary Ni–Fe–Cr–Co catalysts requiring only 231 mV overpotential to reach 20 mA cm−2.
Nis Fisker‐Bødker +3 more
wiley +1 more source
Sensors, 2022 An intelligent reflecting surface (IRS) can intelligently configure wavefronts such as amplitude, frequency, phase, and even polarization through passive reflections and without requiring any radio frequency (RF) chains.
Syed Agha Hassnain Mohsan +4 more
doaj +1 more source
CAUIM: Amazonian Cassava‐Based Programmable Biocolloid
Advanced Intelligent Systems, EarlyView.Bridging indigenous heritage and computation, this work introduces the usage of cauim, a traditional Amazonian cassava fermented beverage, as a programmable memristive‐like substrate and resistance switching. The material exhibits frequency‐dependent dynamics enabling reconfigurable Boolean logic operations.
Raphael Fortulan +5 more
wiley +1 more source
On outage performance of IRS‐assisted wireless communication with user mobility following RWP model
Electronics Letters, 2021 An intelligent reflecting surface (IRS)‐assisted wireless communication system with user mobility following random waypoint (RWP) model is investigated, where the user receives the reflection signal from the IRS controlled by the access point (AP) via a ...
Xiang Zhao, Jinyong Sun
doaj +1 more source
An Ultra‐Low‐Power and High‐Temperature‐Homogeneity Wafer‐Scale Infrared Source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A wafer‐scale MEMS infrared source with an Al@nanoforest radiation layer achieves high emissivity and temperature homogeneity at low power, enabling efficient CO2 detection for smart agriculture. Non‐dispersive infrared gas sensors, renowned for their high selectivity and high reliability, are extensively employed in applications of smart agriculture ...
Qirui Zhang +9 more
wiley +1 more source
Sensors, 2021 The concept of an intelligent reflecting surface (IRS) has recently emerged as a promising solution for improving the coverage and energy/spectral efficiency of future wireless communication systems.
Qasim Sultan +3 more
doaj +1 more source
Intelligent Reflecting Surfaces (IRS)-Enhanced Cooperative NOMA: A Contemporary Review
IEEE AccessThe integration of intelligent reflecting surfaces (IRS) into cooperative non-orthogonal multiple access (NOMA) systems revolutionizes wireless networks by enhancing signal strength, mitigating interference, and optimizing spectral efficiency. The cooperative NOMA (CNOMA) framework, empowered by IRS technology, further promises enhanced performance ...
Sanjeev Sharma +4 more
openaire +2 more sources