Estimation of Tropospheric Scintillation Effects on Satellite Communication Signals at Ka Band Frequencies for Indian Climatic Conditions

Abstract

AbstractIn the Satellite communications Ka band (30/20 GHz) link using with many advantages but scintillation effects are more significant. The “Scintillation” term means rapid signal fluctuations in phase and amplitude due turbulence. These fluctuations caused by irregularities of turbulence in humidity, temperature and pressure posses rapid changes in fraction time in the radio refractive index which is a function of wet term radio refractive index. Hence there is a need to quantify the scintillation phenomenon for the antenna tracking systems and adaptive power control satellite communication system design with complete knowledge on scintillation characteristics like rapid fluctuations in signal amplitude and phase angles. It leads to the prediction and modeling of tropospheric scintillation effects for the accurate design of adaptive link control system in satellite communication systems. This new models give excellent agreement with ITUR model and is applicable to any Ka band satellite adaptive link control systems.KeywordsScintillationsKa bandSatellite signalsTropical climate