Influence of time interval and filter bandwidth on measured rain fade slope

The rate of change of rain attenuation, or ‘fade slope,’ observed on a microwave link, is dependant on system parameters of the receiver. This paper assesses its dependence on two data processing parameters: the time interval over which the fade slope is defined, and the low‐pass filter bandwidth us...

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Bibliographic Details
Published in:Radio science 2004-04, Vol.39 (2), p.n/a
Main Authors: van de Kamp, M. M. J. L., Clérivet, P.
Format: Article
Language:English
Subjects:
fade slope
LPF filtering
propagation modeling
rain attenuation
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Summary:The rate of change of rain attenuation, or ‘fade slope,’ observed on a microwave link, is dependant on system parameters of the receiver. This paper assesses its dependence on two data processing parameters: the time interval over which the fade slope is defined, and the low‐pass filter bandwidth used to remove tropospheric scintillation. A theoretical expression of this dependence is derived. The expression is compared with measured results, which show a good agreement. The results show that the time interval has a strong influence when it is larger than the inverse of the filter bandwidth, and the filter bandwidth has a strong influence when its inverse is larger than the time interval. In general, the fade slope always depends strongly on at least one of the two parameters.
ISSN:0048-6604
1944-799X
DOI:10.1029/2002RS002837