Results 51 to 60 of about 1,885,983 (159)
Space Weather, Volume 24, Issue 9, September 2026.Abstract Equatorial plasma bubbles (EPBs) are typically nighttime ionospheric irregularities, and their persistence into daytime sectors remains insufficiently understood. Here, we investigate long‐lived EPB‐related plasma depletion structures over the Pacific sector during the recovery phase of the 23–25 April 2023 geomagnetic storm using Formosa ...
Hailun Ye +12 more
wiley +1 more source
IRS-Assisted Ambient Backscatter Communications Utilizing Deep Reinforcement Learning
, 2022 We consider an ambient backscatter communication (AmBC) system aided by an intelligent reflecting surface (IRS). The optimization of the IRS to assist AmBC is extremely difficult when there is no prior channel knowledge, for which no design solutions are
Zhou, Xiangyun, Jia, Xiaolun
core +1 more source
ANM-Based DOA Estimation and Signal Detection for Multi-Tag Ambient Backscatter Communications
Applied SciencesAmbient backscatter communication is a promising low-power technology for the Internet of Things (IoT), yet direction of arrival (DOA) estimation and detection in multi-backscatter device (BD) scenarios remain challenging.
Yu Ren +3 more
doaj +1 more source
Cooperative Redox Catalysis of N2O Decomposition by Short‐Range RhOx and CeOx Anchored to Co3O4
Angewandte Chemie International Edition, Volume 65, Issue 34, 17 August 2026.A short‐range Rh–O–Co–O–Ce interfacial moiety drives low‐temperature N2O decomposition via a cooperative redox cycle. Operando modulated‐excitation XAS with phase‐sensitive detection (ME‐XAS + PSD) tracks rapid, reversible Rh oxidation coupled to Co reduction.
Daniel C. Cano‐Blanco +7 more
wiley +1 more source
Resource Allocation for Symbiotic Radio System With Fading Channels
IEEE Access, 2019 In this paper, we investigate the resource allocation problem for the symbiotic radio system, in which the passive backscatter transmission is parasitic in the primary transmission, and the cooperative receiver simultaneously detects the signals ...
Huayan Guo +4 more
doaj +1 more source
Advanced Materials, Volume 38, Issue 45, 13 August 2026.Vacuum‐assisted capillary infiltration delivers perovskite precursors deep into gold nanohole plasmonic hotspots, enabling uniform in situ crystallization of bulk‐like CsPbBr3 within confined cavities. Verified by peel‐off and structural analyses, the hybrid platform shows simulated |E/E₀| ≈2.80 at 800 nm and ∼40‐fold two‐photon absorption‐enhanced ...
Jung‐Jae Do +8 more
wiley +1 more source
, 2018 Integrating ambient backscatter communications into RF-powered cognitive radio networks has been shown to be a promising method for achieving energy and spectrum efficient communications, which is very attractive for low-power or no-power communications.
Longteng Xu +3 more
core +1 more source
First experimental evaluation of ambient backscatter communications with massive MIMO reader
, 2020 International audienceAmbient backscatter communications have been introduced as low-power communications for green networking. This technology is very promising as it recycles ambient radio frequency waves, however such systems have limitations and ...
Phan-Huy, D.-T +9 more
core +1 more source
Metasurface‐Enabled Active‐Like Passive Radar
Advanced Science, Volume 13, Issue 44, 7 August 2026.A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li +7 more
wiley +1 more source
Ambient Backscatter: A Novel Method to Defend Jamming Attacks for Wireless Networks [PDF]
, 2020 © 2012 IEEE. This letter introduces a novel idea to defend jamming attacks for wireless communications. In particular, when the jammer attacks the channel, the transmitter can leverage the jamming signals to transmit data by using ambient backscatter ...
Dutkiewicz, E +9 more
core +1 more source