The search for the most reliable long-term rain attenuation CDF of a slant path and the impact on prediction models

Matricciani, Emilio; Riva, C.

doi:10.1109/tap.2005.854539

Cited by 49 publications

(50 citation statements)

References 4 publications

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“…Results obtained with the N-states Markov chain are not satisfactory with a strong overestimation of the experimental CDF. Concerning the SST, the overestimation of the experimental curve is logical as this technique relies on the conversion to attenuation of the concurrent rain rate time series, whose rain gauge availability is higher than the beacon one [28]. A similar analysis conducted at 30 GHz in Louvain-la-Neuve, at 40 GHz in Oberpfaffenhofen and at 50 GHz in Spino d'Adda is shown in Figure 10.…”

Section: Results In Terms Of Rain Attenuation Distributionsmentioning

confidence: 97%

Development and validation of time‐series synthesizers of rain attenuation for Ka‐band and Q/V‐band satellite communication systems

Lemorton

Castanet

Lacoste

et al. 2007

Satell Commun Network

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SUMMARYThe aim of this paper is to present recent developments in terms of propagation time-series synthesizers, carried out in the framework of the ESA study 16865/03/NL/EC 'Development of propagation models for telecommunication satellite systems' (ONERA Final Report RF 4/07757/DEMR, 2004). The paper is composed of three parts: a review of the initial requirements related to propagation time series for system performance simulation, a description of a collection of rain attenuation time-series synthesizers and of their related input parameters, and a comparative analysis of the output characteristics of these time-series synthesizers as compared with experimental data collected during the OLYMPUS and ITALSAT propagation experiments.

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Section: Results In Terms Of Rain Attenuation Distributionsmentioning

confidence: 97%

Development and validation of time‐series synthesizers of rain attenuation for Ka‐band and Q/V‐band satellite communication systems

Lemorton

Castanet

Lacoste

et al. 2007

Satell Commun Network

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“…), Italy, at 18.7, 39.6, and 49.5 GHz, in a 37.8°slant path (after proper postdetection filtering, the sampling time is 1 s), during the ITALSAT experimental campaign, in the years 1993-2000 (7 years). Second, because this data bank in the long term is not statistically complete because some intense rain-attenuation events were missed [7], we apply the SST to a large data bank of rain-rate time series collected at the same site in the years 1993-2002 (10 years), to simulate rainattenuation time series at the same frequencies and elevation angle ( Figure 1). Table I lists the values of the average efficiency at 18.7, 39.6, and 49.5 GHz both for filtered and non-filtered rain-attenuation time series measured with ITALSAT.…”

Section: Average Efficiency Experimental Resultsmentioning

confidence: 99%

A method to achieve clear-sky data-volume download in satellite links affected by tropospheric attenuation

Matricciani

2015

Int. J. Satell. Commun. Network.

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SUMMARYFor data downloading from satellites, the traditional approach of considering the complementary probability distribution, P(A trop ) of the total tropospheric attenuation A trop (dB), at a frequency, polarization, and elevation angle, may be too pessimistic, and it may lead to large overdesign. If the data volume downloaded in a given observation time T obs (a day, a week, a month, etc.), with a constant probability of symbol error, is more valuable than the instantaneous symbol, or bit rate (as it may be the case in Earth resources observation or in other services that allow long delays in communicating data), another approach can avoid overdesign, namely the various adaptive coding and modulation techniques. We study a particular time integral of A trop (t): (i) to define the average efficiency of a radio channel faded by the troposphere and (ii) to design a method that can theoretically achieve the same volume of data downloaded in clear-sky conditions (no troposphere), even if the radio link is faded by the troposphere. The average efficiency and its bounds can be calculated from the complementary probability distribution of A trop (t). We explicitly apply the theory to radio links faded by rain, by using the experimental rain-attenuation time series measured with satellite ITALSAT in a 37.8°slant path, at 18.7, 39.6, and 49.5 GHz at Spino d'Adda (Italy), and to those simulated with the synthetic storm technique. Based on the average efficiency, we define the method that can achieve in T obs , theoretically, the same data volume as in clear sky, directly applicable to quadrature phase-shift keying, multiple phase-shift keying, and Shannon capacity theorem. The method requires a fixed increase in power margin, and bandwidth, compared with clear-sky conditions, and delivers an average symbol rate equal to the maximum symbol rate obtainable when A trop (t) = 0. The method can also be used in terrestrial links at any frequency. We compare its theoretical performance with the traditional adaptive coding and modulation techniques and show that, even theoretically, these techniques cannot achieve unitary efficiency as, on the contrary, the novel method can do. Real-time satellite communications at frequencies above 10 GHz are characterized with the long-term probability distribution, P(A trop ), of total tropospheric attenuation A trop (dB) (a combination of attenuation due to rain, hail, snow, mist, water vapor, clouds, and oxygen), at a frequency, polarization, and elevation angle. This P(A trop ) refers to an average year, or to a shorter observation period, T obs , for example, a month, and is useful to calculate link budget and to assess link availability. The same approach holds for second-order statistics, such as fade duration and time derivative of fade (rate of change), which describe fading dynamics, especially with regard to rain attenuation, the most rapidly changing and less predictable tropospheric fade in slant paths. Fade duration statistics give information on the duration of continuous out...

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“…In equation (9) Table II is not uncommon in modeling efforts of rain effects on radio links [24], [25]. It is seen that the average values and the standard deviations of the errors resulting from the extended Misme and Fimbel model are generally less than the corresponding figures provided by that of reference [8].…”

Section: Comparison Between Calculations and Measurements And Momentioning

confidence: 99%

Extension of the Misme and Fimbel model for the estimation of the cumulative distribution function of the differential rain attenuation between two converging terrestrial links

Grynszpan

Costa

2013

J. Microw. Optoelectron. Electromagn. Appl.

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The search for the most reliable long-term rain attenuation CDF of a slant path and the impact on prediction models

Cited by 49 publications

References 4 publications

Development and validation of time‐series synthesizers of rain attenuation for Ka‐band and Q/V‐band satellite communication systems

Development and validation of time‐series synthesizers of rain attenuation for Ka‐band and Q/V‐band satellite communication systems

A method to achieve clear-sky data-volume download in satellite links affected by tropospheric attenuation

Extension of the Misme and Fimbel model for the estimation of the cumulative distribution function of the differential rain attenuation between two converging terrestrial links

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