In the design of satellite communication link, rain attenuation statistics is essential information for system designer to realistically determine link availability and provide means to combat system degradation. Due to the limitation of available measured data in equatorial regions especially for high frequencies (Ka-band and above), the prediction model is the best way to obtain rain attenuation statistics. This paper presents statistical analysis of rain attenuation at Ka-band by applying the Stratiform Convective-Synthetic Storm Technique (SC-SST) model taking advantage from local weather features from rain rate time series. The study on seasonal and diurnal variability is also presented in this paper to provide good insight in the design and implementation of fade margin.
A new stochastic dynamic model for the generation of rain attenuation time series for fixed satellite and Line-of-sight (LOS) terrestrial links operating above 10 GHz is presented. The model's concept originate from the classic Maseng-Bakken (M-B) approach apart that it generates Gamma distributed rain attenuation time-series and not lognormal as in M-B approach. Gamma-distributed links are typical at heavy rain climatic regions where the new model is expected to perform better than the M-B. The comparison with experimental results in terms of exceedance probability is very encouraging.
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