Results 1 to 10 of about 92,485 (293)

Physical Layer Security: Channel Sounding Results for the Multi-Antenna Wiretap Channel [PDF]

open access: yesEntropy, 2023
Many physical-layer security works in the literature rely on purely theoretical work or simulated results to establish the value of physical-layer security in securing communications.
Daniel Harman   +5 more
doaj   +2 more sources

Deep convective clouds at the tropopause [PDF]

open access: yesAtmospheric Chemistry and Physics, 2011
Data from the Atmospheric Infrared Sounder (AIRS) on the EOS Aqua spacecraft each day show tens of thousands of Cold Clouds (CC) in the tropical oceans with 10 μm window channel brightness temperatures colder than 225 K.
H. H. Aumann   +2 more
doaj   +4 more sources

Information-Theoretic Analysis of MIMO Channel Sounding [PDF]

open access: yesIEEE Transactions on Information Theory, 2011
99 pages, 14 figures, submitted to IEEE Transactions on Information ...
Baum, Daniel S., Bölcskei, Helmut
openaire   +4 more sources

Exploring the Feasibility of Fall Detection Using Bluetooth Low Energy Channel Sounding in Residential Environments [PDF]

open access: yesSensors
Falls represent a major health risk for older adults living independently, motivating the development of unobtrusive and privacy-preserving monitoring solutions.
Šarūnas Paulikas, Simona Paulikiene
doaj   +2 more sources

Real-Time Channel Sounding for Channel-Adaptive Data Links [PDF]

open access: yes, 2014
The development of wideband mobile communications systems requires a good knowledge of the characteristics of the mobile channel as described by its impulse response. Such impulse response can be modeled as a tapped delay line with delays, amplitudes and phases associated with each tap.
GANIS, ALEXANDER RUDOLF   +3 more
openaire   +3 more sources

Doppler shifts of HF radio waves along oblique propagation paths in the ionosphere

open access: yesВісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023
Urgency. The ionosphere is widely used as a channel for radar, radioastronomy, radio navigation, communication links, and space-based  sounding the Earth.
L. F. Chernogor, Y. H. Zhdanko
doaj   +1 more source

Computer Vision Aided Beamforming Fused With Limited Feedback

open access: yesIEEE Transactions on Machine Learning in Communications and Networking, 2023
The growing antenna array scale, the uncorrelated fadings between downlink and uplink of frequency division duplex (FDD) or analog beamforming design increases the difficulty of channel sounding or estimation.
T. Xiang   +4 more
doaj   +1 more source

High-Frequency Channel Modeling Based on the Multi-Source Ionospheric Assimilation Model

open access: yesRemote Sensing, 2022
In this paper, we explored how to more accurately predict the quality of high-frequency links and how to better research and improve the capabilities of high-frequency communication, reconnaissance, and positioning systems.
Mingjie Lv   +7 more
doaj   +1 more source

Industrial wireless channel measurements in a 2.4 GHz ISM radio band using a low-cost SDR-based channel sounder

open access: yesReCIBE, 2020
Industrial wireless channel is a challenge for the design of communication systems, due to non-Line-of-Sight transmission, caused by the presence of many highly reflective obstacles, and machines in operation, which are a source of the increased noise ...
Grzegorz Korzeniewski   +1 more
doaj   +1 more source

Methodology for Measuring the Frequency Dependence of Multipath Channels Across the Millimeter-Wave Spectrum

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
Millimeter-wave (mmWave) communications promise Gigabit/s data rates thanks to the availability of large swaths of bandwidth between 10–100 GHz.
Damla Guven   +9 more
doaj   +1 more source

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