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Progress In Electromagnetics Research B
ISSN: 1937-6472
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INVESTIGATION OF GSM SIGNAL VARIATION DRY AND WET EARTH EFFECTS

By S. Helhel, S. Ozen, and H. Göksu

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Abstract:
This work proposes a site attenuation method to calculate the intensity of the field received by a mobile phone on a two-lane highway. To validate the model, radio propagation measurement was carried out through the intercity connection highway of the City of Isparta. The measurement system consisted of live radio base stations transmitting at 900 MHz and 1800 MHz. Downlink signal strength level data were collected by using TEMS test mobile phones, and were analyzed by TEMS Investigation, MapInfo and Google earth. Transmitted power-into-antenna was 14 W for both 900 MHz and 1800 MHz. Both base station sectors are facing towards the same direction having a 14 dBi gain. A proposed approximation was compared with real data. The results indicate that wet white pine trees cause 3 dB to 6 dB extra loss at 1800 MHz and about 1 dB to 3 dB extra loss at 900 MHz. Although 1800 MHz transmitter is 10 m higher, it loses its advantage in signal strength at longer distances.

Citation:
S. Helhel, S. Ozen, and H. Göksu, "Investigation of GSM Signal Variation Dry and Wet Earth Effects," Progress In Electromagnetics Research B, Vol. 1, 147-157, 2008.
doi:10.2528/PIERB07101503

References:
1. Helhel, S., E. Karacuha, and S. Seker, Ray tracing propagation model of UHF radio waves for corridors, Icecs’97, Cairo, Egypt, 1997.

2. Yamauchi, Y., T. Abe, and T. Sekiguchi, "Experimental study of radio propagation characteristics in an underground street and corridors," Proc. of EMC, Vol. 28, No. 3, 1986.

3. Emsline, A. G., R. L. Lagace, and P. F. Strong, "Theory of the propagation of UHF radio waves in coal mine tunnels," IEEE Trans. on Antennas and Propagation, Vol. 23, No. 2, 1975.

4. Tan, S. Y. and H. S. Tan, "UTD propagation model in an urban street scene for microcellular Comm.," Trans. on EMC, Vol. 35, No. 4, 1993.

5. Hata, M., "Empirical formula for propagation loss in land mobile radio services," IEEE Transactions on Vehicular Technologies, Vol. 29, No. 3, 317-325, 1980.
doi:10.1109/T-VT.1980.23859

6. Martijn, E. F. T. and M. H. A. J. Herben, "Characterization of radio wave propagation into buildings at 1800 MHz," IEEE Antennas and Wireless Propagation Letters, Vol. 2, 122-125, 2003.
doi:10.1109/LAWP.2003.815279

7. Helhel, S. and S. Ozen, Disadvantage of 1800 MHz operators in roaming competition in an airport welcome lobby, Workshop on Electromagnetic Wave Scattering EWS 2006, Gebze, Turkey, 2006.

8. Helhel, S., "Comparison of 900 MHz and 1800 MHz indoor propagation deterioration," IEEE Transactions on Antenna Propagation, Vol. 54, No. 12, 3921-3924, 2006.
doi:10.1109/TAP.2006.884311

9. Teh, C. H., F. Kung, and H. T. Chuah, "A path-corrected wall model for ray-tracing propagation modeling," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 2, 207-214, 2006.
doi:10.1163/156939306775777288

10. Tamir, T., "Radio wave propagation along mixed paths in forest environments," IEEE Trans. on Antennas and Propagation, Vol. 25, No. 4, 471-477, 1977.
doi:10.1109/TAP.1977.1141620

11. Cavalcante, G. P. S. and A. J. Giarola, "Optimization of radio-communication in three layered media," IEEE Transactions on Antennas and Propagation, Vol. 31, No. 1, 1983.
doi:10.1109/TAP.1983.1142985

12. Cavalcante, G. P. S., D. A. Rogers, and A. J. Giarola, "Radio loss in forest using a model with four layered media," Radio Science, Vol. 18, No. 5, 1983.
doi:10.1029/RS018i005p00691

13. Cavalcante, G. P. S., M. A. R. Sanches, and R. A. N. Oliveira, "Mobile radio propagation along mixed paths in forest environment," Journal of Microwaves and Optoelectronics, Vol. 1, No. 4, 42-52, 1999.

14. Oliveira, R. A. N., G. P. S. Cavalcante, and G. L. Siqueira, Ray tracing model for mobile systems in a forested environments, ITS’98 International Telecommunication Symposium, 206-311, Sao Paulo, Basil, 1998.

15. Hsieh, C.-Y., "Dependence of backscattering from leaves on dry-matter fraction and permittivity of saline water of leaves ," Journal of Microwaves and Optoelectronics, Vol. 3, No. 3, 2003.

16. Helhel, S., B. Colak, D. A. Sahinkaya, and H. Serbest, Dry matter fraction affect on backscattering at 8-12 GHz, Spring Report of Space Technologies Department, TUBITAK-MAM, 1995.

17. Georgiadou, E. M., A. D. Panagopoulos, and J. D. Kanellopoulos, "Millimeter wave pulse propagation through distorted raindrops for los fixed wireless access channels," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 9, 1235-1248, 2006.
doi:10.1163/156939306777442953

18. Rogers, N. C., A. Seville, J. Richter, D. Ndzi, N. Savage, R. F. S. Caldeirinha, A. K. Shukla, M. O. Al-Nuaimi, K. Craig, E. Vilar, and J. Austin, A generic model of 1-60 GHz radio propagation through vegetation, Final Report, 2002.

19. Li, Y. and P. Yang, "The permittivity based on electromagnetic wave attenuation for rain medium and its applications," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 15, 2231-2238, 2006.
doi:10.1163/156939306779322512

20. Martijn, E. F. T. and M. H. A. J. Herben, "Characterization of radio wave propagation into buildings at 1800 MHz," IEEE Antennas and Wireless Propagation Letters, Vol. 2, 122-125, 2003.
doi:10.1109/LAWP.2003.815279

21. McLennan, B., A report on `VHF/UHF/Microwave radio propagation: A primer for digital experimenters', 1-23, Communications Research Center in Ottawa, 2004.

22. Beroual, A. and H. Houari, "Assessment of cavities and water contents through the complex dielectric permittivity computed by the boundary integral equation method," Journal of Civil Engineering and Management, Vol. Xii, No. 4, 277-283, 2006.

23. MSI (Mobile Systems International), Planet Technical Reference Guide, Planet Version 2.7, 1997.

24. Smith, A. A., "Standard site method for determining antenna factors," IEEE Transactions on Electromagnetic Compatibility, Vol. 24, No. 3, 316-322, 1982.
doi:10.1109/TEMC.1982.304042

25. Sugiura, A., "Formulation of normalized site attenuation in terms of antenna impedances," IEEE Transactions on Electromagnetic Compatibility, Vol. 32, No. 4, 257-263, 1990.
doi:10.1109/15.59884


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