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2015-06-01
Analysis of Bistatic Scattering Due to Hydrometeors on SHF and EHF Links in a Subtropical Location: a Comparative Study Based on the Rain Cell Models
By
Progress In Electromagnetics Research M, Vol. 42, 95-107, 2015
Abstract
The inevitable increase in radio interference within microwave systems continue to be of major concern as more of radio communication services compete with bandwidth assigned to the fixed service, fixed satellite service and broadcasting satellite service. Interference hampers coverage and capacity of these services often lead to the reduction in the signal to noise ratio at the receiving terminals. The existing global hydrometeor scatter model proposed by the International Telecommunication Union, when applied to the tropical and subtropical location often leads to considerable inaccuracies due to the wide range of intense climatic and geographical nature of this region. In this study, the bistatic intersystem interference due to hydrometeors between satellite systems and terrestrial downlink receiver terminal systems in a subtropical station computation is based on the Awaka and Capsoni cell models. For the attenuation of both wanted and unwanted paths to the receiver, the existing model based on the specific attenuation has been modified to include the equivalent path length through rain in the estimation of the attenuation. Results obtained show that the Capsoni model exhibits the normal trend under a moist atmosphere with a gaseous attenuation more pronounced at frequencies greater than or equal to 30 GHz. Also at high rain rates greater than 70 mm/h and considering the rain with melting layer, up to about 70 dB difference was observed between transmission losses estimated using Awaka and Capsoni models at link probabilities ranging between 1-10-3% unavailability of the time.
Citation
Pius Adewale Owolawi Tom Walingo , "Analysis of Bistatic Scattering Due to Hydrometeors on SHF and EHF Links in a Subtropical Location: a Comparative Study Based on the Rain Cell Models," Progress In Electromagnetics Research M, Vol. 42, 95-107, 2015.
doi:10.2528/PIERM15031706
http://www.jpier.org/PIERM/pier.php?paper=15031706
References

1. Capsoni, C., F. Fedi, C. Magistroni, A. Pawlina, and A. Paraboni, "Data and theory for a new model of the horizontal structure of rain cells for propagation applications," Radio Science, Vol. 22, No. 3, 395-404, 1987.
doi:10.1029/RS022i003p00395

2. Ojo, J. S. and R. C. Okeowo, "The application of 3D rain scatter model on horizontally polarized shf signal propagation in tropical location," Int. J. of Infrared Millimeter Waves, Vol. 29, 1136-1145, 2008.
doi:10.1007/s10762-008-9406-1

3. Crane, R., "Bistatic scatter from rain," IEEE Trans. Antennas and Propagation, Vol. 22, No. 2, 12-320, 1974.

4. Ajewole, M. O. and J. S. Ojo, "Intersystem interference due to hydrometeor scattering on satellite downlink signals in tropical locations," African Journal of Science and Technology (AJST) Science and Engineering Series, Vol. 6, No. 2, 84-89, 2005.

5. Ojo, J. S., S. K. Sarkar, and A. T. Adediji, "Intersystem interference on horizontally polarized radio signals in tropical climate," Indian Journal of radio and Space Physics, Vol. 37, 408-413, 2008.

6. Ojo, J. S. and C. I. Joseph-Ojo, "An estimate of interference effect on horizontally polarized signal transmission in the tropical locations: A comparison of rain-cell models," Progress In Electromagnetics Research C, Vol. 6, 67-79, 2008.
doi:10.2528/PIERC08022601

7. Doherty, L. H. and S. A. Stone, "Forward scatter from rain," IEEE Trans. Antennas Propagation, Vol. 8, No. 4, 414-418, 1960.
doi:10.1109/TAP.1960.1144879

8. Awaka, J., "A 3D rain cell model for the study of interference due to hydrometeor scattering," J. Comm. Res. Lab., Vol. 36, No. 147, 13-44, 1989.

9. Olsen, R. L., D. V. Rogers, R. A. Hulays, and M. M. Z. Kharadly, "Interference due to hydrometeor scatter on satellite communication links," Proc. IEEE, Vol. 81, No. 6, 914-922, 1993.
doi:10.1109/5.257688

10. Capsoni, C. and M. D’Amico, "A physically based simple prediction method for scattering interference," Radio Sci., Vol. 32, No. 2, 397-407, 1997.
doi:10.1029/96RS03211

11. CakajShkelzen, K. and A. L. Scholtz, "Modelling of interference caused by uplink signal for low Earth orbiting satellite ground stations," Proceedings of the 17th IASTED Int. Conference on Applied Simulation and Modeling, 187-191, Corfu, Greece, 2008.

12. Ajewole, M. O., L. B. Kolawole, and G. O. Ajayi, "Evaluation of bistatic intersystem interference due to scattering by hydrometeors on tropical paths," Int. J. of Satell. Commun., Vol. 17, 337-356, 1999.

13. Ajewole, M. O., "Bistatic interference due to tropical rainfall types: A comparison of rain-cell models," Attidella Fondazione Giorgio Ronchi, Vol. 58, No. 1, 121-141, 2003.

14. Owolawi, P. A., M. O. Fashuyi, and T. J. Afullo, "Rainfall rate modeling for LOS radio systems in South Africa," SAIEE Transactions, African Research Journal, Vol. 97, No. 1, 2006.

15. Owolawi, P., "Raindrop size distribution model for the prediction of rain attenuation in Durban," PIERS Proceedings, 1068-1075, Suzhou, China, Sep. 12-16, 2011.

16. Alonge, A. A. and T. J. Afullo, "Seasonal analysis and prediction of rainfall effects in eastern South Africa at microwave frequencies," Progress In Electromagnetics Research B, Vol. 40, 279-303, 2012.
doi:10.2528/PIERB12020305

17. Kerr, D. E., Propagation of Short Radio Waves, Sect 2:1, Mc Graw Hill, New York, 1951.

18. Ishimaru, A., Wave Propagation and Scattering in Random Media, IEEE Press and Oxford University Press, New York, NY, USA, 1997.

19. Ajayi, G. O. and I. E. Owolabi, "Rainfall parameters from disdrometer dropsize measurements at a tropical station," Ann. Telecomm., Vol. 42, No. 1--2, 3-12, 1987.

20. Glover, I. A. and P. M. Grant, Digital Communication, 3rd Ed., Pearson Education Ltd., Edinburgh Gate, Harlow, England, 2010.

21. Owolawi, P. A. and S. J. Malinga, "Computation of rain scattering properties at SHF and EHF for radio wave propagation in South Africa," Presented at URSI 2013, Ottawa, Ontario, Canada, 2013.

22. Commission of the European Communities on Cooperation in the Fields of Scientific and Technical Research, COST Project 210 Campaign, Final Rept. EUR 13407EN-C, ISBN 92-826-2400-5, Brussels, 1991.

23. ITU-R, Rec. P.836-5, "Water vapour surface density and total columnar content,", ITU Geneva, 2013.

24. Ray, R. S., "Broadband complex refractive indices of ice and water," Appl. Opt., Vol. 11, No. 8, 1811-1836, 1972.
doi:10.1364/AO.11.001836

25. http://www.satellite-calculations.com/Satellite/Downlink.htm.

26. Bryant, G. H., I. Adimula, C. Riva, and G. Brusaard, "Rain attenuation statistics from rain cell diameters and heights," Int. J. Satell. Commun., Vol. 19, 263-283, 2001.
doi:10.1002/sat.673

27. ITU-R Rec. P.837-6 Characteristics of precipitation for propagation modelling, ITU-R, Geneva, 2012.

28. Thurai, M. and J. W. F. Goddard, "Precipitation scatter measurements from a transhorizon experiment at 11.2 GHz," IEE-Proc.-H., Vol. 139, 53-58, 1992.

29. ITU-R, Rec. P.676-8 Attenuation by atmospheric gases, ITU Geneva, 2009.