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Annales Des Télécommunications

, Volume 56, Issue 5–6, pp 353–362 | Cite as

Ice crystals and raindrop canting angle effects applied to satellite interference prediction with respect to heavy rain climatic zones

  • J. D. Kanellopoulos
  • A. D. Panagopoulos
Article
  • 80 Downloads

Abstract

For frequencies above 10GHz the performance of the operating satellite systems is mainly aggravated because of the potential existing severe rain attenuation. As a result of the above fading mechanism, the dominant interference sources encountered in this frequency band are the following: differential rain attenuation induced by an adjacent satellite system operating in the same frequency, and cross talk between orthogonally polarized signals. The latter source concerns of course satellite systems employing the dual polarization mode. In the present paper, an already existing method to predict interference statistics, due to above reasons, is properly modified to include ice crystals and raindrop canting angle effects. The assumption that the point rainfall rate statistics follows a gamma form, valid for heavy rain climatic regions such as J, M, N, P, Q zones, is also adopted. The sensitivity of various parameters affecting the interference performance, after introducing the novel assumptions, is finally investigated.

Keywords

Elevation Angle Angular Separation Rain Attenuation Angle Effect Dual Polarization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

PRISE EN COMPTE DES CRISTAUX DE GLACE ET DE ĽANGLE DE BISEAUTAGE DES GOUTTES DE PLUIE DANS LA PRÉDICTION DES BROUILLAGES SATELLITES DANS LES ZONES CLIMATIQUES DE PLUIE INTENSE

Résumé

Aux fréquences supérieures à 10 GHz, la cause principale de la détérioration de performance des systèmes de communication par satellite est ľaffaiblissement dû à une pluie éventuelle. A cause de ce mécanisme, les principales sources de brouillage dans cette bande de fréquences sont ľaffaiblissement différentiel dû à la pluie, induit par un système à satellite adjacent qui fonctionne à la même fréquence, et la diaphonie entre deux signaux polarisés orthogonalement; cette deuxième source ne concerne que les systèmes qui fonctionnent en double polarisation. Cet article présente ľextension ďune méthode — déjà utilisée pour la prédiction de la statistique des brouillages dus aux deux sources citées — qui prend en compte des cristaux de glace ainsi que des effets ďangle de biseautage des gouttes de pluie avec pour hypothèse que ľintensité de la pluie est décrite par une distribution gamma. Cette hypothèse est valable pour des régions de pluie intense, comme les zones J, M, N, P et Q. Une fois que les nouvelles hypothèses ont été introduites, on étudie la sensibilité des différents paramètres qui influencent la statistique des brouillages.

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References

  1. [1]
    Rogers (R.R.), Olsen R.L., Strickland (J.L.), Coulson (G.M.), Statistics of differential rain attenuation on adjacent Earth-space propagation paths,Ann. Telecommun. (1982),37, n° 11-12, pp. 445–452.Google Scholar
  2. [2]
    Kanellopoulos (J.D.), Ventouras (S.), Vazouras (C.N.), A revised model for the prediction of differential rain attenuation on adjacentEarth-space propagation paths, Radio Science, USA (1993),28, pp. 1071–1086.CrossRefGoogle Scholar
  3. [3]
    Kanellopoulos (J.D.), Margetis (D.), A predictive analysis of differential attenuation on adjacent satellite paths including rain height effects,European Transactions on Telecommun. (1997),8, n° 2, pp. 141–148CrossRefGoogle Scholar
  4. [4]
    Kanellopoulos (J.D.), Vazouras (C.N.), Predictive analysis of the interference on a dual polarized satellite system due to cross polarization and differential rain attenuation (gamma case),Inst. Electron. Inf. Commun. Eng. Trans. Commun. (1996),E79-B, pp. 587–594.Google Scholar
  5. [5]
    Kanellopoulos (J.D.),Panagopoulos (A.D.), A predictive analysis of the interference on a dual polarized satellite system due to cross polarization and differential rain attenuation including ice crystals and raindrop canting angle effects,Proceedings iceea’99, Torino 1999, pp. 93–96.Google Scholar
  6. [6]
    Morita (K.), Higuti (I.), Prediction methods for rain attenuation distributions of micro and millimeter waves, Review of the E.C.L., n.t.t. (1976),24, n° 7-8, p. 651.Google Scholar
  7. [7]
    Matricciani (E.), Mauri (M.), Cochannel interference in sattelite communication systems derived from rain attenuation measurements at 20 GHz,Int. Jour. of Sat. Commun. (1996),14, pp. 71–76.CrossRefGoogle Scholar
  8. [8]
    International Radio Consultative Committee, Prediction methods for depolarization in the design of the Earth-space telecommunication system,Report 564-3, Geneva (1985), Int. Telecommunication Union.Google Scholar
  9. [9]
    Abramovitz (M.), Stegun (I.), Handbook of Mathematical Functions,Dover Publications (1965), New York.Google Scholar
  10. [10]
    Crane (R.K.), Prediction of attenuation by rain,ieee Trans. on Commun. (1980),com -28, pp. 1717–1733.CrossRefGoogle Scholar
  11. [11]
    Crane (R.K.), A global model for rain attenuation prediction,ieee East Con. Rec. (1978), pp. 391–395.Google Scholar
  12. [12]
    International Radio Consultative Committee, Propagation data and prediction methods required for Earth-space telecommunication systems, Report 564-2, (MOD. F) Doc.5/1040-E, Geneva (1986), Int. Telecommun. Union.Google Scholar
  13. [13]
    Mattriciani (E.), Copolar and cochannel satellite interference during rain at 11.6GHz estimated from radar measurements,Int. Jour. of Sat. Commun. (1997),15, pp.65–71.CrossRefGoogle Scholar
  14. [14]
    Kanellopoulos (J.D.), Panagopoulos (A.D.), Livieratos (S.N.), A comparison of copolar and cochannel satellite interference prediction models with experimental results at 11.6 GHz and 20GHz,Int. Jour. of Sat. Commun., (2000), 18, 107–120.CrossRefGoogle Scholar
  15. [15]
    Kanellopoulos (J.D.), Ventouras(S.), KouKOULAs(S.G.), Prediction of the outage performance of an unbalanced orbital diversity Earth-space system (Gamma case),Jour. of Elec. Waves and Appl. (1993),7, pp. 1257–1270.CrossRefGoogle Scholar
  16. [16]
    Ha (T.T.), Digital Satellite Communications, MacMillan(1986), New York.Google Scholar
  17. [17]
    International Radio Consultative Committee, Attenuation by hydrometeors, in particular precipitation and other atmospheric particles, Report 721-3, Düsseldorf (1990), Int. Telecommun. Union.Google Scholar

Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • J. D. Kanellopoulos
    • 1
  • A. D. Panagopoulos
    • 1
  1. 1.Division of Electroscience, Department of Electrical and Computer EngineeringNational Technical University of AthensZografouGreece

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