M. Patzold et al., A STUDY OF A LAND MOBILE SATELLITE CHANNEL MODEL WITH ASYMMETRICAL DOPPLER POWER SPECTRUM AND LOGNORMALLY DISTRIBUTED LINE-OF-SIGHT COMPONENT, IEEE transactions on vehicular technology, 47(1), 1998, pp. 297-310
In satellite to mobile communications, there is generally, in addition
to the diffuse multipath component, a strong line-of-sight (LOS) comp
onent present, The spectral and statistical properties of both compone
nts are influenced by shadowing caused by obstacles such as trees, hou
ses, or small buildings, In this paper, an analytical model for a land
mobile satellite channel is analyzed that takes into consideration va
rious kinds of shadowing situations, For the LOS component, it is assu
med that, first, the received frequency shows a Doppler shift, Second,
the amplitude variations coincide with a lognormal distribution, More
over, it is also assumed that shadowing influences the diffuse scatter
ed component, with the consequence that its Doppler power spectrum get
s an asymmetrical shape, The resulting spectral and statistical proper
ties of the analytical model are investigated, Exact solutions for, th
e probability density function (pdf) of the amplitude and phase are gi
ven, and approximative solutions for the level-crossing rate (LCR) and
average duration of fades (ADF's) are derived, Finally, an efficient
deterministic simulation model is presented that enables the implement
ation of the proposed analytical model on a digital computer.