volume | PIER Journals

Abstract

A comprehensive review of radio wave attenuation in forest environments is presented in this paper. The classic analytical methods of propagation loss modeling and prediction are described first. This provides information on the physical processes that the radio waves undergo while propagating through a forest. The focus of this paper is on the review and summary of the experimental work done in this area and the development of empirical propagation loss prediction models. The propagation loss variation due to external factors such as antenna height-gain, depolarization, humidity effect etc. are examined and discussed individually. In view of current research work done in this area, some possible future work is proposed to improve the performance of radio links in forest environment.

1. Jensen, M. A. and J. W. Wallace, "A review of antennas and propagation for MIMO wireless communications," IEEE Trans. Antennas Propag., Vol. 52, No. 11, 2810-2824, 2004.
doi:10.1109/TAP.2004.835272 Google Scholar

2. Paulraj, A. J., D. A. Gore, R. U. Nabar, and H. Bolcskei, "An overview of MIMO communications --- A key to gigabit wireless," Proceedings of the IEEE, Vol. 92, No. 2, 198-218, 2004.
doi:10.1109/TVT.2005.856194 Google Scholar

3. Molisch, A. F., "Ultrawideband propagation channels --- Theory, measurement, and modeling ," IEEE Trans. Veh. Technol., Vol. 54, No. 5, 1528-1545, 2005.
doi:10.1109/TVT.2005.856194 Google Scholar

4. Bertoni, H. L., Radio Propagation for Modern Wireless Systems, Prentice Hall PTR, 2000.

5. Liao, D. and K. Sarabandi, "Near-earth wave propagation characteristics of electric dipole in presence of vegetation or snow layer," IEEE Trans. Antennas Propag., Vol. 53, No. 11, 3747-3756, 2005.
doi:10.1109/TAP.2005.856347 Google Scholar

6. Liao, D. and K. Sarabandi, "Modeling and simulation of nearearth propagation in presence of a truncated vegetation layer," IEEE Trans. Antennas Propag., Vol. 55, No. 3, 949-957, 2007.
doi:10.1109/TAP.2007.891812 Google Scholar

7. Joshi, G. G., C. B. Dietrich, C. R. Anderson, W. G. Newhall, W. A. Davis, J. Isaacs, and G. Barnett, "Near-ground channel measurements over line-of-sight and forested paths," IEE Proc. Microw. Antennas Propag., Vol. 152, No. 6, 589-596, 2005.
doi:10.1049/ip-map:20050013 Google Scholar

8. Anderson, C. R., H. I. Volos, W. C. Headley, F. C. B. Muller, and R. M. Buehrer, "Low antenna ultra wideband propagation measurements and modeling in a forest environment," Proc. IEEE Wireless Commun. Networking Conf., 1229-1234, Las Vegas, USA, 2008. Google Scholar

9. Tamir, T., "On radiowave propagation in forest environments," IEEE Trans. Antennas Propag., Vol. 15, No. 6, 806-817, 1967.
doi:10.1109/TAP.1967.1139054 Google Scholar

10. Dence, D. and T. Tamir, "Radio loss of lateral waves in forest environments," Radio Sci., Vol. 4, No. 4, 308-318, 1969.
doi:10.1029/RS004i004p00307 Google Scholar

11. Tamir, T., "Radio waves propagation along mixed paths in forest environments," IEEE Trans. Antennas Propag., Vol. 25, No. 4, 471-477, 1977.
doi:10.1109/TAP.1977.1141620 Google Scholar

12. Le Palud, M., "Propagation modeling of VHF radio channel in forest environments," Proc. IEEE Military Commun. Conf., 609-614, Monterey, CA, 2004. Google Scholar

13. Cavalcante, G. P. S. and A. J. Giarola, "Optimization of radio communication in media with three layers," IEEE Trans. Antennas Propag., Vol. 31, No. 1, 141-145, 1983.
doi:10.1109/TAP.1983.1142985 Google Scholar

14. Li, Y. and H. Ling, "Numerical modeling and mechanism analysis of VHF wave propagation in forested environments using the equivalent slab model," Progress In Electromagnetics Research, Vol. 91, 17-34, 2009.
doi:10.2528/PIER09012306 Google Scholar

15. Cavalcante, G. P. S., D. A. Rogers, and A. J. Giardola, "Radio loss in forests using a model with four layered media," Radio Sci., Vol. 18, No. 5, 691-695, 1983.
doi:10.1029/RS018i005p00691 Google Scholar

16. Seker, S. S. and A. Schneider, "Stochastic model for pulsed radio transmission through stratified forests," IEE Proc. Microw. Antennas Propag., Vol. 134, No. 4, 361-368, 1987. Google Scholar

17. Seker, S. S., "Radio pulse transmission along mixed paths in a stratified forest," IEE Proc. Microw. Antennas Propag., Vol. 136, No. 1, 13-18, 1989. Google Scholar

18. Li, L. W., T. S. Yeo, P. S. Kooi, and M. S. Leong, "Radio wave propagation along mixed paths through a four-layered model of rain forest: An analytic approach," IEEE Trans. Antennas Propag., Vol. 46, No. 7, 1098-1111, 1998.
doi:10.1109/8.704814 Google Scholar

19. Koh, J. H., L. W. Li, P. S. Kooi, T. S. Yeo, and M. S. Leong, "Dominant lateral waves in canopy layer of a four-layered forest," Radio Sci., Vol. 34, No. 3, 681-691, 1999.
doi:10.1029/1999RS900007 Google Scholar

20. Li, L. W., T. S. Yeo, P. S. Kooi, M. S. Leong, and J. H. Koh, "Analysis of electromagnetic wave propagation in forest environment along multiple paths," Journal of Electromagnetic Waves and Applications, Vol. 13, No. 8, 1057-1059, 1999.
doi:10.1163/156939399X01212 Google Scholar

21. Li, L. W., C. K. Lee, T. S. Yeo, and M. S. Leong, "Wave mode and path characteristics in an inhomogeneous anisotropic forest environment ," IEEE Trans. Antennas Propag., Vol. 52, No. 9, 2445-2455, 2004.
doi:10.1109/TAP.2004.834021 Google Scholar

22. Sarabandi, K. and I. S. Koh, "Effect of canopy-air interface roughness on HF-VHF wave propagation in forest," IEEE Trans. Antennas Propag., Vol. 50, No. 2, 111-121, 2002.
doi:10.1109/8.997979 Google Scholar

23. Koh, I. S., F. Wang, and K. Sarabandi, "Estimation of coherent field attenuation through dense foliage including multiple scattering," IEEE Trans. Geosci. Remote Sensing, Vol. 41, No. 5, 1132-1135, 2003.
doi:10.1109/TGRS.2003.813552 Google Scholar

24. Wang, F. and K. Sarabandi, "An enhanced millimeter-wave foliage propagation model," IEEE Trans. Antennas Propag., Vol. 53, No. 7, 2138-2145, 2005.
doi:10.1109/TAP.2005.850704 Google Scholar

25. Wang, F. and K. Sarabandi, "A physics-based statistical model for wave propagation through foliage," IEEE Trans. Antennas Propag., Vol. 55, No. 3, 958-968, 2007.
doi:10.1109/TAP.2007.891841 Google Scholar

26. Schwering, F. K., F. K., E. J. Violette, and R. H. Espeland, "Millimeter-Wave propagation in vegetation: Experiments and theory," IEEE Trans. Geosci. Remote Sensing, Vol. 26, No. 3, 355-367, 1988.
doi:10.1109/36.3037 Google Scholar

27. Didascalou, D., M. Younis, and W. Wiesbeck, "Millimeter-wave scattering and penetration in isolated vegetation structures," IEEE Trans. Geosci. Remote Sensing, Vol. 38, No. 5, 2106-2113, 2000.
doi:10.1109/36.868869 Google Scholar

28. Fernandes, T., R. Cladeirinha, M. O. Al-Nuaimi, and J. Richter, "A discrete RET model for millimetre-wave propagation in isolated tree formations," IEICE Trans. Commun., Vol. E88-B, No. 6, 2411-2418, 2005.
doi:10.1093/ietcom/e88-b.6.2411 Google Scholar

29. Weissberger, M. A., "An initial critical summary of models for predicting the attenuation of radio waves by foliage," Electromagnetic Compatibility Analysis Center, Annapolis, MD, ECAC-TR-81-101, 1981. Google Scholar

30. CCIR, , Influences of terrain irregularities and vegetation on troposphere propagation, 235-236 CCIR Report, Geneva, 1986.

31. COST235, , Radio propagation effects on next-generation fixed-service terrestrial telecommunication systems, Final Report, Luxembourg, 1996.

32. Al-Nuaimi, M. O. and R. B. L. Stephens, "Measurements and prediction model optimization for signal attenuation in vegetation media at centimetre wave frequencies," IEE Proc. Microw. Antennas Propag., Vol. 145, No. 3, 201-206, 1998.
doi:10.1049/ip-map:19981883 Google Scholar

33. Seville, A. and K. H. Craig, "Semi-empirical model for millimetre-wave vegetation attenuation rates," Electron. Lett., Vol. 31, No. 17, 1507-1508, 1995.
doi:10.1049/el:19951000 Google Scholar

34. Seville, A., "Vegetation attenuation: Modeling and measurements at millimetric frequencies," Proc. 10th IEE Int. Conf. Antennas Propag., 2.5-2.8, Edinburgh, Scotland, 1997.

35. Rogers, N. C., A. Seville, J. Richter, D. Ndzi, N. Savage, R. Caldeirinha, A. Shukla, M. Al-Nuaimi, K. Craig, E. Vilar, and J. Austin, A generic model of 1{60 GHz radio propagation through vegetation-Final report, Tech. Report, Radiocommunications Agency, 2002.

36. Ziade, Y., H. Roussel, M. Lesturgie, and W. Tabbara, "A coherent model of forest propagation{application to detection and localization of targets using the DORT method," IEEE Trans. Antennas Propag., Vol. 56, No. 4, 1048-1057, 2008.
doi:10.1109/TAP.2008.919150 Google Scholar

37. Burrows, C. R., "Ultra-short-wave propagation in the jungle," IEEE Trans. Antennas Propag., Vol. 14, No. 3, 386-388, 1966.
doi:10.1109/TAP.1966.1138698 Google Scholar

38. Tewari, R. K., S. Swarup, and M. N. Roy, "Radio wave propagation through rain forests of India," IEEE Trans. Antennas Propag., Vol. 38, No. 4, 433-449, 1990.
doi:10.1109/8.52261 Google Scholar

39. Seker, S. S. and A. Schneider, "Experimental characterization of UHF radiowave propagation through forests," IEE Proc. Microw. Antennas Propag., Vol. 140, No. 5, 329-335, 1993. Google Scholar

40. Kovacs, I. Z., P. C. F. Eggers, and K. Olesen, "Radio channel characterization for forest environments in the VHF and UHF frequency bands," Proc. IEEE 50th Veh. Technol. Conf., 1387-1391, Amsterdam, the Netherlands, 1999.

41. Goldman, J., G. W. Swenson, and Jr., "Radio wave propagation through woods," IEEE Mag. Antennas Propag., Vol. 41, No. 5, 34-36, 1999.
doi:10.1109/74.801512 Google Scholar

42. Meng, Y. S., Y. H. Lee, and B. C. Ng, "Near ground channel characterization and modeling for a tropical forested path," Proc.29th URSI General Assembly, Chicago, USA, 2008. Google Scholar

43. Phaiboon, S. and S. Somkurnpanich, "Mobile path loss characteristics for low base station antenna height in different forest densities," Proc. First Int. Symp. Wireless Pervasive Computing, Phuket, Thailand, 2006.

44. Meng, Y. S., Y. H. Lee, and B. C. Ng, "Empirical near ground path loss modeling in a forest at VHF and UHF bands," IEEE Trans. Antennas Propag., Vol. 57, No. 5, 1461-1468, 2009.
doi:10.1109/TAP.2009.2016703 Google Scholar

45. Lagrone, A. H., "Propagation of VHF and UHF electromagnetic waves over a grove of trees in full leaf," IEEE Trans. Antennas Propag., Vol. 25, No. 6, 866-869, 1977.
doi:10.1109/TAP.1977.1141708 Google Scholar

46. Tewari, R. K., S. Swarup, and M. N. Roy, "An empirical result for the height gain in forest medium," IEEE Trans. Antennas Propag., Vol. 32, No. 11, 1265-1268, 1984.
doi:10.1109/TAP.1984.1143232 Google Scholar

47. Swarup, S. and R. K. Tewari, "Depolarization of radio waves in jungle environment," IEEE Trans. Antennas Propag., Vol. 27, No. 1, 113-116, 1979.
doi:10.1109/TAP.1979.1142042 Google Scholar

48. Kovacs, I. Z., P. C. F. Eggers, and K. Olesen, "Characterization of cross polarization discrimination in forest environments," Proc. IEEE 52nd Veh. Technol. Conf., 725-731, Boston, MA, USA, 2000.

49. Meeks, M. L., "VHF propagation over hilly, forested terrain," IEEE Trans. Antennas Propag., Vol. 31, No. 3, 483-489, 1983.
doi:10.1109/TAP.1983.1143066 Google Scholar

50. Low, K., "UHF measurement of seasonal field-strength variations in forests," IEEE Trans. Veh. Technol., Vol. 37, No. 3, 121-124, 1988.
doi:10.1109/25.16537 Google Scholar

51. Evans, N., "Seasonal propagation effects in an obstructed rural radio path at 462 MHz ," Electron. Lett., Vol. 31, No. 8, 674-675, 1995.
doi:10.1049/el:19950436 Google Scholar

52. Meng, Y. S., Y. H. Lee, and B. C. Ng, "The effects of tropical weather on radio wave propagation over foliage channel," IEEE Trans. Veh. Technol., Vol. 58, No. 9, May 2009. Google Scholar

53. Vincent, W. R. and G. H. Hagn, "Comments on the performance of VHF vehicular radio sets in tropical forests," IEEE Trans. Veh. Technol., Vol. 18, No. 2, 61-65, 1969.
doi:10.1109/T-VT.1969.23405 Google Scholar

54. Meng, Y. S., Y. H. Lee, and B. C. Ng, "Study of the diversity reception in a forested environment," IEEE Trans. Wireless Commun., Vol. 8, No. 5, 2302-2305, 2009.
doi:10.1109/TWC.2009.081073 Google Scholar

55. Matthaeis, P. D. and R. H. Lang, "Microwave scattering models for cylindrical vegetation components," Progress In Electromagnetics Research, Vol. 40, 131-153, 2003. Google Scholar

56. Huang, E. X. and A. K. Fung, "Electromagnetic wave scattering from vegetation with odd-pinnate compound leaves," Journal of Electromagnetic Waves and Applications, Vol. 19, No. 2, 231-244, 2005.
doi:10.1163/1569393054497339 Google Scholar

Dr. Yu Song Meng

Dr. Yee Hui Lee

Dr. Boon Chong Ng