Thesis supervisor: László Csurgai-Horváth
Location of studies (in Hungarian): Department of Broadband Infocommunication and Electromagnetic Theory Abbreviation of location of studies: HVT
Description of the research topic:
The Alphasat telecommunication satellite was launched in July 2013 by Inmarsat to improve the
quality of his high speed mobile communications services. In the development of the satellite also
participated the European Space Agency (ESA) and besides of the commercial application ESA
accommodated four on-board scientific experiments as well.
One of them is the Aldo Paraboni Q/V band communication and propagation experiment. In the frame
of the propagation experiment constant power beacon signals are transmitted towards the Earth in the
Ka and Q bands at 19.701 and 39.402 GHz frequencies, allowing the measurement of propagation
conditions of the radio channel. The communication experiment serves the investigation of adaptive
coding and modulation schemes by transmitting and receiving DVB-S2 streams.
After the stabilization of the satellite’s position experiments started at the beginning of 2014 and will
be continued during the whole lifetime of the satellite (15 years). The primary goal of the experiment
is the deep investigation of these frequency bands, the analysis of different conditions influencing the
radio wave propagation, the refinement of existing channel models and the development of new ones.
Nowadays this is a hot topic as the higher frequencies will play important role in the future high speed
communication systems.
Our department joined to the Alphasat programme in the frame of research cooperation with ESA. A
beacon receiver station is already operating at the department for both frequency bands. A receiver
station for the communication experiment is under development and it will be in operation during
2016.
The work of the student undertaking of the PhD programme is mainly relating to the propagation
aspects of the Ka/Q band. The following research areas can be foreseen:
• Statistical description of the satellite propagation channel (first and second order statistics, the
dynamics of the fading process) and development of new channel models, based on actual
measurements.
• Provide relevant, proved inputs (statistics based on qualified measurement data processing) for
ITU-R in order to extend their measurement databases and improve the relevant ITU-R
recommendations.
• Investigation of the influence of different meteorological parameters (rain intensity, wind
speed/direction, temperature, humidity) on the propagation. Participating in the installation and the
data processing of a meteorological sensor system.
As the Alphasat research programme is conducted under international framework, the cooperation
with different partners (academic and research institutes) can be foreseen. The participation on
international conferences and support for publication will be ensured.
The candidate should have good reading and communication skills in English and the ability to
understand and process the written scientific literature. Ability to handle laboratory measurement
devices is advantageous. Matlab and programming skill in C, C++, C# or other is also beneficial.
Required language skills: English Recommended language skills (in Hungarian): angol Number of students who can be accepted: 1
Deadline for application: 2017-06-26
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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