Investigation the Ka/Q band satellite propagation

OData support
Dr. Csurgai-Horváth László
Department of Broadband Infocommunications and Electromagnetic Theory

The Budapest University of Technology and Economics, Department of Broadband Infocommunications and Electromagnetic Theory joined to the Alphasat TDP#5 Ka/Q band propagation experiment at 01.02.2014. The main goal of this experiment to study the Space-Earth propagation channel on special frequency bands that might have significance for the future high speed and broadband communication. The background and the details of this research and the processing of measured data take place in my thesis work .

After acquiring the necessary knowledge I continued my work with the link budget calculation. At this point of my work I compared the theoretic and measured rain margins. I calculated the minimal carry to noise rate from the difference between the two rain margin values. In addition I performed an examination about the dependence of rain margin and any determined parameters.

Later I concatenated the daily files into weekly and monthly files and I plotted them using Matlab. Several graphs were made about received power, attenuation and rain intensity. In the second half of the semester I made figures about comparing the attenuations which were calculated in accordance with ITU Recommandations and the measured attenuations. The values based on ITU Recommendation were similar to the measured attenuation values. Finally I made a comparison of measured and calculated attenuation based on a statistic procedure. Here I found significant difference between the probability values at specific attenuations. Probably the inaccurate measurements of the meteorological station caused that difference. In consequence of the previous fact, the calculated attenuation (according to ITU Recommendation) do not represent correctly the measured values.


Please sign in to download the files of this thesis.