Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Terje Tjelta"'
Publikováno v:
Journal of Telecommunications and Information Technology, Iss 3 (2016)
This article review lessons learned from the uses of radio-frequency (RF) spectrum at national and international scales. Its main purpose is to stimulate debate on how to allow new wireless systems to operate, and to reduce the chronic apparent short
Externí odkaz:
https://doaj.org/article/13cb475e35284b259489485c884b94d3
Publikováno v:
2023 17th European Conference on Antennas and Propagation (EuCAP).
Publikováno v:
Marine Geology. 373:26-38
Acoustic imaging has revealed more than 7000 pockmarks on the seafloor above the Troll East gas field in the Norwegian North Sea. We present the first comprehensive study conducted on one of the World's largest pockmark fields complementing the acous
Publikováno v:
12th European Conference on Antennas and Propagation (EuCAP 2018).
Publikováno v:
Radio Science. 49:1232-1244
Rainfall rate varies both temporarily and spatially. Radio systems, where rain attenuation causes outages, may take advantage of this effect to increase the radio link or satellite link availability using diversity techniques. In the Oslo region with
Autor:
Martin Rytir, Lars Erling Bråten, Terje Tjelta, Michael Cheffena, Jan Erik Hakegard, Per Arne Grotthing
Satellite services in the High North are utilized extensively for both communication purposes and for earth and climate observations. This paper presents results of two year measurements at 20 GHz and co-sited meteorological data. The results suggest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20eed397940edf49de3260223b84f813
https://hdl.handle.net/11250/2463082
https://hdl.handle.net/11250/2463082
Publikováno v:
IEEE Transactions on Antennas and Propagation
Analysis of two years of measurements from a three-site satellite beacon diversity experiment in Norway is presented. The operating frequency was 19.68 GHz, elevation angles were between 21.7° and 22°, and site separations 23, 29.7 and 50.1 km. Due
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1bca0d6bd90b2493d2efcf4c39c5cf3
http://hdl.handle.net/11250/2456544
http://hdl.handle.net/11250/2456544
Autor:
Jostein Mamen, Terje Tjelta
Publikováno v:
Radio Science. 49:788-797
Radio systems are affected by rainfall, and the attenuation increases significantly with rain rate and frequency. Above about 10 GHz rainfall must generally be considered for estimating expected link availability with sufficient attenuation margin in
Publikováno v:
IEEE Transactions on Antennas and Propagation. 58:3421-3426
We present a time dynamic channel simulator for broadband fixed wireless access systems which properly combines earlier reported models for single degradation effects. The wideband model combines the effect of rain, scintillation, vegetation and mult
Autor:
Terje Tjelta, David R. Bacon
Publikováno v:
IEEE Transactions on Antennas and Propagation. 58:1677-1682
Radio links are used in all parts of the world, and must operate reliably in local climatic conditions. Attenuation due to rain has been extensively studied, but the additional loss due to wet snow has received less attention. Until recently there ha