Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Laurent Féral"'
Publikováno v:
International Journal of Antennas and Propagation, Vol 2022 (2022)
Current spatial resolutions achieved by mesoscale weather forecast models allow them to be used to generate the state of the lowest layers of the atmosphere over areas as small as a few square kilometers which corresponds to the typical size of the t
Externí odkaz:
https://doaj.org/article/3fdab6690d86430b9325ff6350b52755
Publikováno v:
International Journal of Antennas and Propagation, Vol 2012 (2012)
The design and optimization of propagation impairment techniques for space telecommunication systems operating at frequencies above 20 GHz require a precise knowledge of the propagation channel both in space and time. For that purpose, space-time cha
Externí odkaz:
https://doaj.org/article/fba17982a1944164b55e8609a06f8cfb
Publikováno v:
Radio Science.
Autor:
Laurent Quibus, Valentin Le Mire, Julien Queyrel, Xavier Boulanger, Laurent Castanet, Laurent Féral
Publikováno v:
IEEE Antennas and Wireless Propagation Letters
IEEE Antennas and Wireless Propagation Letters, 2022, 22 (3), pp.601-605. ⟨10.1109/LAWP.2022.3219776⟩
IEEE Antennas and Wireless Propagation Letters, 2022, 22 (3), pp.601-605. ⟨10.1109/LAWP.2022.3219776⟩
International audience; Earth-space communications are to make use of higher frequencies, at and above 20 GHz, to offer new services and increased data rates. A consequence is a strong attenuation of the carrier waves by the troposphere, particularly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eba0d397014de71d5d6e239525d29c73
https://hal.science/hal-04051903/file/demr22066.pdf
https://hal.science/hal-04051903/file/demr22066.pdf
Publikováno v:
12th European Conference on Antennas and Propagation (EuCAP 2018).
The ionosphere influence on radio electric signals propagating from a satellite to the Earth can lead to rapid amplitude and phase variations for the receiver : the ionospheric scintillation. We developed an analytic propagation model to link the par
Autor:
Laurent Féral, Laurent Castanet, Nicolas Jeannin, Françoise Carvalho, Xavier Boulanger, Frederic Lacoste
Publikováno v:
International Journal of Satellite Communications and Networking. 32:423-441
SUMMARY This set of two companion papers aims at providing a model for the inter-annual variability of earth-space propagation statistics and for the inherent risk and CIs. In part I, it was proposed to model the yearly variance σ² of empirical com
Publikováno v:
International Journal of Satellite Communications and Networking. 32:407-421
SUMMARY This set of two companion papers aims at providing a statistical framework to quantify the inter-annual variability observed on the statistics of rain attenuation or rainfall rate derived from Earth-space propagation measurements. This part I
Publikováno v:
Space Communications. 22:59-70
To insure a favourable link budget in order to reach the required availabilities and to counteract severe propagation impairments, Fade Mitigation Techniques FMT, such as adaptive coding [8, 9] have to be implemented in the fixed satellites telecommu
Publikováno v:
Beacon Satellite Symposium BSS 2016
Beacon Satellite Symposium BSS 2016, Jun 2016, TRIESTE, Italy
HAL
Beacon Satellite Symposium BSS 2016, Jun 2016, TRIESTE, Italy
HAL
International audience; Ionospheric scintillations, in particular at equatorial and polar latitudes, are responsible of GNSS receiver loss of lock and accuracy decreasing. To improve the future GNSS systems, an understanding of the effect of the iono
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::3f6bab9f9d469e30afb31c5ed42a27c7
https://hal.archives-ouvertes.fr/hal-01353714/document
https://hal.archives-ouvertes.fr/hal-01353714/document
Publikováno v:
IEEE Transactions on Antennas and Propagation. 56:3350-3355
A worldwide modelling of integrated liquid water and water vapor content distributions is proposed and evaluated. The knowledge of those distributions is valuable to predict attenuation for Earth-space communication systems operating at frequencies h