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A Study of a Land Mobile Satellite Channel Model with Asymmetrical Doppler Power Spectrum and Lognormally Distributed Line-of-Sight Component (1996)
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BibTeX
@MISC{Pätzold96astudy,
author = {Matthias Pätzold and Yingchun Li and Frank Laue},
title = {A Study of a Land Mobile Satellite Channel Model with Asymmetrical Doppler Power Spectrum and Lognormally Distributed Line-of-Sight Component},
year = {1996}
}
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Abstract
In satellite to mobile communications, there is generally in addition to the diffuse multipath component a strong line-of-sight component present. The spectral and statistical properties of both components are influenced by shadowing caused by obstacles such as trees, houses or small buildings. In this paper an analytical model for a land mobile satellite channel is analyzed that takes into consideration various kinds of shadowing situations. For the line-of-sight component it is assumed that firstly the received frequency shows a Doppler shift and secondly the amplitude variations coincide with a lognormal distribution. Moreover, it is also assumed that shadowing influences the diffuse scattered component, with the consequence that its Doppler power spectrum gets an asymmetrical shape. The resulting spectral and statistical properties of the analytical model are investigated. Exact solutions for the probability density function of the amplitude and phase are given, and approximative solutions for the level-crossing rate and average duration of fades are derived. Finally, an efficient deterministic simulation model is presented that enables the implementation of the proposed analytical model on a digital computer.
Keyphrases
asymmetrical doppler power spectrum lognormally distributed line-of-sight component land mobile satellite channel model analytical model statistical property amplitude variation exact solution digital computer doppler shift efficient deterministic simulation model probability density function level-crossing rate small building strong line-of-sight component present approximative solution asymmetrical shape consideration various kind average duration lognormal distribution received frequency satellite channel doppler power spectrum diffuse multipath component line-of-sight component
