A new ‘event‐on‐demand’ synthesizer of rain attenuation time series at Ku‐, Ka‐ and Q/V‐bands

Abstract

SUMMARYTo develop and test real-time fade mitigation techniques control algorithms, propagation time series are needed. An alternative to using real data collected from propagation experiments is to generate typical fading time-series making use of climatological characteristics as well as geometrical and radio-electrical parameters of the link. The objective of this paper is to present a rain attenuation time-series synthesizer and able to generate events on demand. The model is based on an enhanced version of the Maseng-Bakken stochastic model. In the first part of this paper, the basic principles of the enhanced Maseng-Bakken model are recalled and the parameterization of this channel model is discussed for temperate European climates. Then, the theoretical bases of the Lacoste-Carrie 'event-on-demand' model and its validation constitute the second part of this paper. The enhanced Maseng-Bakken model is fully stochastic, whereas the Lacoste-Carrie 'event-on-demand' one offers the possibility to command the maximum attenuation level and the duration of the synthesized event.

Slant path rain attenuation synthesizers for tropical and equatorial regions

“…The proposition in this work is to use the Lacoste-Carrié (L-C) "event-on-demand" model [6] for this purpose. This model relies on the same theoretical basis as E.M-B model but allows the user to command some characteristics of each isolated event to be synthesized: duration D, maximum attenuation A max and moment of maximum attenuation D peak .…”

“…Two of them are versions based on Maseng-Bakken (M-B) theory [2]: the first one is the original version of the M-B model whereas the other one is an enhanced version of it [3], [4]. The third channel model is a composition of a macroscopic (periods of rain and clear sky generated by 2-state Markov-chains [5]) and a microscopic model (rain attenuation events created by the Lacoste-Carrié "event-on-demand" model [6]). …”

Design and Simulation of a DVB-S2-like Adaptive Air interface Designed for Low Bit Rate Emergency Communications Satellite Link in Ku/Ka/Q/V Bands

“…Step 2: The offline pre-processing propagation module written in C must be run in order to generate the needed attenuation time series for the return link in Ka and EHF bands using the enhanced stochastic Maseng-Bakken model developed by Lacoste and Carrié (Lacoste, 2005;Castanet et al, 2008;Carrié et al;Lemorton et al, 2007). The module uses the Juzzle C data-driven engine.…”

“…Nevertheless, it must be kept in mind that this uniform ACM scheme over the whole area is also a consequence of a simplistic assumption concerning the channel propagation modelling, in which no spatial variability is taken into account. Only a temporal variability is modeled using Carrié's enhancement of Lacoste's CNES/ONERA rain fading time series stochastic generator based on Maseng-Bakken model (Lacoste, 2005;Castanet et al, 2008;Carrié et al;Lemorton et al, 2007).…”

Special issue on ‘Channel modelling and propagation impairment simulation activities within the SatNEx project’

“…Guillaume CARRIE, Frederic LACOSTE, Laurent CASTANET: 'A New 'EventOn-Demand' Synthesizer of Rain Attenuation Time Series at Ku-, Ka-and Q/V-bands' [8] To develop and test real-time fade mitigation techniques control algorithms, propagation time series are needed. An alternative to using real data collected from propagation experiments is to generate typical fading time-series making use of climatological characteristics as well as geometrical and radio-electrical parameters of the link.…”