Abstract
This paper presents a radiowave propagation model for inhomogeneous forests based on the Radiative Energy Transfer theory (RET) model. This model, which is a discretised version of the RET, is able to simulate the behaviour of radiowaves inside a forest which contains various types of vegetation and free space gaps. The forest is divided into non-overlapping square cells, each one with different propagation characteristics. The propagation properties of each cell rely on specific propagation parameters, which are extracted from vegetation using an appropriate measurement method which is also described. The model performance is assessed through comparison between predicted values and directional spectrum measurements carried out in an isolated inhomogeneous forest at 20 and 62.4 GHz. This forest, located in South Wales, is formed by 6 different species of trees of various sizes and leaf types. The measurements were performed with the trees in-leaf.
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References
Caldeirinha, R.F.S.: Radio characterisation of single trees at micro- and millimetre wave frequencies. PhD thesis, University of Glamorgan (2001)
Didascalou, D., Younis, M., Wiesbeck, W.: Millimeter-wave scattering and penetration in isolated vegetation structures. IEEE Transasctions on Geoscience and Remote Sensing 38, 2106–2113 (2000)
Fernandes, T., Caldeirinha, R., Al-Nuaimi, M., Richter, J.: A discrete RET model for millimeter-wave propagation in isolated tree formations. IEICE Transactions on Communications E88-B(6), 2411–2418 (2005)
Fernandes, T., Caldeirinha, R., Al-Nuaimi, M., Richter, J.: A practical method for vegetation scattering function parameter extraction and scaling. In: Loughborough Antennas and Propagation Conference - LAPC, UK, vol. 1, pp. 105–109 (2006)
Ishimaru, A.: Wave propagation and scattering in random media. IEEE Press, Los Alamitos (1997)
ITU-R: Recommendation ITU-R P.833-5, Attenuation in vegetation. ITU-R (2005)
Johnson, R.A., Schwering, F.: A transport theory of millimeter wave propagation in woods and forest. Technical Report CECOM-TR-85-1, Forth Monmouth (1985)
Richter, J., Caldeirinha, R., Al-Nuaimi, M.: Phase function measurement for modelling radiowave attenuation and scatter in vegetation based on the theory of radiative energy transfer. In: Proceeding of PIMRC 2002, pp. 146–150 (2002)
Rogers, N.C., Seville, A., Richter, J., Ndzi, D., Caldeirinha, R., Shukla, A., Al-Nuaimi, M., Craig, K., Austin, J.: A generic model of 1-60GHz radio propagation trough vegetation - Final report. Technical report, Radiocommunications Agency (2002)
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Fernandes, T.R., Caldeirinha, R.F.S., Al-Nuaimi, M.O., Richter, J. (2008). Directional Spectrum Modelling in Inhomogeneous Forests at 20 and 62.4 GHz. In: Filipe, J., Obaidat, M.S. (eds) E-Business and Telecommunication Networks. ICETE 2006. Communications in Computer and Information Science, vol 9. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-70760-8_26
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DOI: https://doi.org/10.1007/978-3-540-70760-8_26
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-70759-2
Online ISBN: 978-3-540-70760-8
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