Results 11 to 20 of about 2,316 (239)

Material Characterization and Radio Channel Modeling at D-Band Frequencies

open access: yesIEEE Access, 2021
As the throughput requirements for wireless communication links keep rising, characterization of sub-THz radio channels is necessary. This paper presents the results of a radio channel measurement campaign in which we characterize the full D-band ...
Brecht De Beelde   +5 more
doaj   +1 more source

Empirical Season’s Fadings in Radio Communication at 6 GHz Band

open access: yesJournal of Telecommunications and Information Technology, 2009
This paper covers unavailability of line-of-sight radio links due to multipath propagation. Multipath fading in the atmosphere is not permanent phenomenon.
Jan Bogucki, Ewa Wielowieyska
doaj   +1 more source

Hybrid Optical-Radio Transmission System Link Quality: Link Budget Analysis

open access: yesIEEE Access, 2020
From the last few decades' radio frequency (RF) spectrum remained attractive for wireless/wire-line applications. RF spectrum becomes dense and occupied, which makes its availability difficult to other broadband channels.
Hasnain Kashif   +2 more
doaj   +1 more source

Reliability of line-of-sight radio-relay systems

open access: yesJournal of Telecommunications and Information Technology, 2006
The modern radio transmission systems are specifically designed for catching principally two main objectives: on one side to provide a radio solution for long distance where large configurations are required to fulfill the high capacity transmissions ...
Jan Bogucki, Ewa Wielowieyska
doaj   +1 more source

A radiometeorological study of the Chios-Lemnos line of sight radio link

open access: yespure and applied geophysics, 1967
This study deals with the conditions of radio wave propagation in the link between the islands Chios and Lemnos and especially with the influence of weather situations upon this propagation. The field fading forms have been classified into three typesA, B andC which have an annual course of large amplitude.
Anastassiades, M., Carapiperis, L.
openaire   +3 more sources

Lightweight Biometric Sensing for Walker Classification Using Narrowband RF Links

open access: yesSensors, 2017
This article proposes a lightweight biometric sensing system using ubiquitous narrowband radio frequency (RF) links for path-dependent walker classification.
Tong Liu, Zhuo-qian Liang
doaj   +1 more source

Secure key distribution exploiting error rate criticality for radio frequency links

open access: yesRoyal Society Open Science, 2023
We propose a method by which two radio frequency (RF) communication terminals exchange encryption keys or other data securely. This method draws on the approach developed for quantum key distribution (QKD) for detecting eavesdroppers but our method does ...
Christopher J. Stevens   +2 more
doaj   +1 more source

Rainfall rate modeling and worst month statistics for millimetric line‐of‐sight radio links in South Africa [PDF]

open access: yesRadio Science, 2007
Rain attenuation has a serious impact on the availability and performance of radio communication services operating in the frequencies above 10 GHz. In order to reliably predict rain attenuation for a given location, there is a need for studying monthly and seasonal rainfall variability, worst month and average worst month statistics of rain, and ...
Pius A. Owolawi, Thomas J. Afullo
openaire   +1 more source

LoRa Mobile-To-Base-Station Channel Characterization in the Antarctic

open access: yesSensors, 2017
Antarctic conditions demand that wireless sensor nodes are operational all year round and that they provide a large communication range of several tens of kilometers.
Johnny Gaelens   +3 more
doaj   +1 more source

Blockage-Aware Flow Control in E-UTRA-NR Dual Connectivity for QoS Enhancement

open access: yesIEEE Access, 2022
Millimeter-wave (mmWave) communication included in new radio (NR) provides high throughput to meet the stringent requirements of modern applications. However, its performance is highly dependent on whether obstacles are blocking line-of-sight (LOS) paths.
Jungjun Kim, Saewoong Bahk
doaj   +1 more source

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