Results 21 to 30 of about 176,235 (317)

A Semiempirical MIMO Channel Model in Obstructed Viaduct Scenarios on High-Speed Railway

open access: yesInternational Journal of Antennas and Propagation, 2014
A semiempirical multiple-input multiple-output (MIMO) channel model is proposed for high-speed railway (HSR) viaduct scenarios. The proposed MIMO model is based on the combination of realistic single-input single-output (SISO) channel measurement results
Tao Zhou   +3 more
doaj   +1 more source

Robust Resource Allocation for Indoor Self-Blockage Millimeter Wave Device-to-Device Communications

open access: yesIEEE Open Journal of the Communications Society, 2022
The advancement of millimeter wave (mmWave) technology can meet the requirements of large amounts of data communications among intelligent devices for indoor scenarios. However, reducing interference in an enclosed region is still challenging because the
Haie Dou   +5 more
doaj   +1 more source

Broadband Faraday isolator [PDF]

open access: yesJournal of the Optical Society of America A, 2013
submitted to JOSA A, comments are ...
Berent, Michal   +2 more
openaire   +3 more sources

3D Fourier Ptychographic Microscopy Based on the Beam Propagation Method and Time-Reversal Scheme

open access: yesIEEE Access, 2019
3D Fourier ptychographic microscopy can recover objects with high resolution across large volumes, which is very challenging in 3D imaging particularly because multiple scattering may occur within the sample.
Yongbing Zhang   +4 more
doaj   +1 more source

In situ magnetometry study on the origin of anomalously capacity in transition metal sulfides

open access: yesChemPhysMater, 2023
Cobalt sulfides are considered as promising candidates for lithium-ion battery (LIB) anode materials with high energy densities. Their energy storage mechanism is widely understood to involve the traditional intercalation and conversion reaction. However,
Yan Liu   +10 more
doaj   +1 more source

Design of Optical Tunnel Switching Networks for Big Data Applications

open access: yesApplied Sciences, 2020
In this paper, we proposed large-scale optical tunnel switching networks based on the Torus topology network with WSS (Wavelength Selective Switch) for future big data applications.
Yuh-Jiuh Cheng   +3 more
doaj   +1 more source

Investigation of MIMO Channel Characteristics in a Two-Section Tunnel at 1.4725 GHz

open access: yesInternational Journal of Antennas and Propagation, 2017
This paper presents results from a wide band single-input–single-output (SISO) and 16 × 16 virtual multiple-input–multiple-output (MIMO) measurement campaign at a center frequency of 1.4725 GHz in a 100-meter long tunnel laboratory which is terminated by
Rongchen Sun   +5 more
doaj   +1 more source

RF Spectrum Sensing Based on an Overdamped Nonlinear Oscillator Ring for Cognitive Radios

open access: yesSensors, 2016
Existing spectrum-sensing techniques for cognitive radios require an analog-to-digital converter (ADC) to work at high dynamic range and a high sampling rate, resulting in high cost.
Zhi-Ling Tang, Si-Min Li, Li-Juan Yu
doaj   +1 more source

Investigation of Shadowing Effects in Typical Propagation Scenarios for High-Speed Railway at 2350 MHz

open access: yesInternational Journal of Antennas and Propagation, 2016
Based on realistic measurements in China, shadowing characteristics at the frequency of 2350 MHz were investigated in typical High-Speed Railway environments.
Liu Liu   +4 more
doaj   +1 more source

Fast Light and the Speed of Information Transfer in the Presence of Detector Noise

open access: yesIEEE Photonics Journal, 2009
The phenomenon of fast-light pulse propagation has seen renewed interest in recent years, but its relationship to the speed of information transfer is still being debated.
Michael Z. Feng   +2 more
doaj   +1 more source

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