Results 31 to 40 of about 520,343 (350)

METHOD OF AN ESTIMATION OF INFLUENCE ANISOTROPIC IRREGULARITIES IN AN IONOSPHERE ON CHARACTERISTICS OF THE CHANNEL OF A SATELLITE COMMUNICATION

open access: yesВестник Северо-Кавказского федерального университета, 2022
In the article action of the anisotropic irregularities in an ionosphere on a satellite channel is investi- gated. Relations between the exponent, characterising depth of fadings in a communication channel, with sta- tistical performances of the ...
Vyacheslav Anatolievich Shevchenko
doaj  

Unmanned Aerial Vehicle Propagation Channel over Vegetation and Lake Areas: First- and Second-Order Statistical Analysis

open access: yesSensors, 2021
The use of unmanned aerial vehicles (UAV) to provide services such as the Internet, goods delivery, and air taxis has become a reality in recent years.
Deyvid L. Leite   +4 more
doaj   +1 more source

Analysis of energy detection of unknown signals under Beckmann fading channels [PDF]

open access: yes, 2017
(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or ...
Lopez-Martinez, F. Javier   +2 more
core   +1 more source

Massive MIMO With Spatially Correlated Rician Fading Channels [PDF]

open access: yesIEEE Transactions on Communications, 2018
This paper considers multi-cell massive multiple-input multiple-output systems, where the channels are spatially correlated Rician fading. The channel model is composed of a deterministic line-of-sight path and a stochastic non-line-of-sight component ...
Özgecan Özdogan   +2 more
semanticscholar   +1 more source

Exploring types of individual unlearning by local health-care managers: an original empirical approach

open access: yesHealth Services and Delivery Research, 2013
Background: The ability of health-care managers or organisations to adapt and respond to change is vital if they are to succeed in the contemporary health-care environment. Change involves the learning of new behaviours and giving up, or abandoning, some
CR Coombs   +4 more
doaj   +1 more source

Online Regularization of Complex-Valued Neural Networks for Structure Optimization in Wireless-Communication Channel Prediction

open access: yesIEEE Access, 2020
This article proposes online-learning complex-valued neural networks (CVNNs) to predict future channel states in fast-fading multipath mobile communications.
Tianben Ding, Akira Hirose
doaj   +1 more source

Development of Ag-Doped ZnO Thin Films and Thermoluminescence (TLD) Characteristics for Radiation Technology

open access: yesNanomaterials, 2022
This work examined the thermoluminescence dosimetry characteristics of Ag-doped ZnO thin films. The hydrothermal method was employed to synthesize Ag-doped ZnO thin films with variant molarity of Ag (0, 0.5, 1.0, 3.0, and 5.0 mol%).
Hammam Abdurabu Thabit   +5 more
doaj   +1 more source

Performance of BPSK subcarrier intensity modulation free-space optical communications using a log-normal atmospheric turbulence model [PDF]

open access: yes, 2010
In this paper, we present simulation results for the bit error rate (BER) performance and the fading penalty of a BPSK - subcarrier intensity modulation (BPSK-SIM) free-space optical (FSO) communication link in a log-normal atmospheric turbulence model ...
Ghassemlooy, Zabih   +6 more
core   +2 more sources

OFDM comparison with FFT and DWT processing for DVB-T2 wireless channels

open access: yesInge-Cuc, 2018
Introduction: Recent studies on the FFT processing (Fast Fourier Transform) or DWT (Discrete Wavelet Transform) of the OFDM signal (Orthogonal Frequency Division Multiplexing) have shown pros and cons for DVB-T2 (Digital Video Broadcasting-Second ...
Hernan Paz Penagos
doaj   +1 more source

Statistical properties for multipath-relayed communications over fading channels [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2008
In this paper, a multipath transmission with no regenerative relays over fading channels has been addressed. The probability density function of minimum amplitude at relay stations input has been determined.
Stefanović Mihajlo   +3 more
doaj   +1 more source

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