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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Cloud Attenuation Prediction Statistics for GEO and NGSO Satellite Communication Systems Operating at Q/V Band and Above
摘要： The employment of extremely high frequency bands (like Q/V and W bands) in the next generation satellite communication system has been proposed for feeder links operation in order to satisfy the ever growing satellite users’ demands. For the feeder links’ reliable performance analysis, the total atmospheric attenuation has to be taken into account. In this paper, a methodology for the estimation of cloud attenuation induced on a satellite slant path, through time series generation of Integrated Liquid Water Content (ILWC), for GEO satellites is presented and modified to consider joint attenuation statistics of cloud attenuation for multiple slant paths and also for the cloud attenuation prediction for NGSO links (MEO and LEO cases). The models are derived from cloud attenuation time series synthesizers, based on stochastic differential equations (SDEs), that incorporate properly the spatial and temporal behavior of ILWC and the time dependence of the elevation angle for NGSO links. Numerical results for GEO, MEO and LEO satellite systems operating at Q and W band are reported. The single link cases are tested with the ITU-R. P. 840-6 model. Interesting conclusions are drawn.
关键词： Cloud attenuation,Feeder Links,diversity gain,NGSO systems,Q and W band,joint cloud attenuation statistics
更新于2025-09-04 15:30:14
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Comparison of Measured and Theoretically Predicted Rain Attenuation at 32 GHz and 38 GHz
摘要： Rain attenuation of terrestrial microwave links is addressed here. Statistics of attenuation from 17 short range links at frequency of 32 GHz and 38 GHz spanning over period of more than two years are shown. Statistics of measured attenuation is compared with theoretically calculated statistics of rain loss. Rainfall data used in theoretical calculations come from a network of rain gauges. It is found that theoretically calculated rain attenuation systematically underestimates measured loss by several dB.
关键词： attenuation statistics,microwave links,propagation
更新于2025-09-04 15:30:14