Distributed satellite communication system using the low power stations

Marcin Stolarski

Abstract

The dissertation presents an original theory of satellite communication by means of Distributed Ground Station System. The author carries out a detailed analysis of the parametres of currently used satellite communication. He points out the flaws in current communication systems, such as little (for the time being) exploit of university stations, limited range of Low Earth Orbit and failure in using many stations to improve link quality. He proposes changes to the existing systems, presenting the theoretical assumptions of DGSS, which solves the above-mentioned problems. The RSN system consists in parallel reception of the signal from the same satellite transmitter by many ground stations. When using distributed reception of a single source by many receivers, all with a specific link quality, it is possible to obtain less erroneous data via the comparison of received packets. This phenomenon results from mutually uncorrelated noises of given receivers. Additionally, different places of ground station installation enable independent environmental noises of radio band. This results in a set of correlated data streams with uncorrelated noises. Comparing such streams facilitates strengthening the correct values and muffling the incorrect ones. Subsequently, the author performs a detailed analysis of the proposed solution, presenting numerous one-dimensional, as well as three-dimensional simulations. Through balloon experiments, he shows that implementing a communication system is possible with the use of DGSS. Parallel reception of data sent only once from the balloon car was achieved by using a couple of receiving stations. The experiments have confirmed that distributed reception improves transmission quality. After being subjected to comparative analysis, the received data was later used for generating data with a reduced number of incorrect information. Further experiments, featuring a laboratory model, produced very detailed results that confirmed high quality of the author’s mathematical model of DGSS and the algorithms for link quality improvement. The author’s idea of RSN allows to implement it into currently operative systems, with such implementations are being done at present. RSN technologies may prove instrumental for overcoming technological barriers of contemporary and future antenna systems.
Diploma typeDoctor of Philosophy
Author Marcin Stolarski (FEIT / RE)
Marcin Stolarski,,
- The Institute of Radioelectronics
Title in EnglishDistributed satellite communication system using the low power stations
Languagepl polski
Certifying UnitFaculty of Electronics and Information Technology (FEIT)
Disciplinetelecommunications / (technology domain) / (technological sciences)
Start date23-01-2007
Defense Date30-03-2010
End date27-04-2010
Supervisor Józef Modelski (FEIT / RE)
Józef Modelski,,
- The Institute of Radioelectronics

Internal reviewers Andrzej Dąbrowski (FEIT / IT)
Andrzej Dąbrowski,,
- The Institute of Telecommunications
External reviewers Ryszard Zieliński
Ryszard Zieliński,,
-
Pages160
Keywords in Englishsatellite communications, distributed ground station
Abstract in EnglishThe dissertation presents an original theory of satellite communication by means of Distributed Ground Station System. The author carries out a detailed analysis of the parametres of currently used satellite communication. He points out the flaws in current communication systems, such as little (for the time being) exploit of university stations, limited range of Low Earth Orbit and failure in using many stations to improve link quality. He proposes changes to the existing systems, presenting the theoretical assumptions of DGSS, which solves the above-mentioned problems. The RSN system consists in parallel reception of the signal from the same satellite transmitter by many ground stations. When using distributed reception of a single source by many receivers, all with a specific link quality, it is possible to obtain less erroneous data via the comparison of received packets. This phenomenon results from mutually uncorrelated noises of given receivers. Additionally, different places of ground station installation enable independent environmental noises of radio band. This results in a set of correlated data streams with uncorrelated noises. Comparing such streams facilitates strengthening the correct values and muffling the incorrect ones. Subsequently, the author performs a detailed analysis of the proposed solution, presenting numerous one-dimensional, as well as three-dimensional simulations. Through balloon experiments, he shows that implementing a communication system is possible with the use of DGSS. Parallel reception of data sent only once from the balloon car was achieved by using a couple of receiving stations. The experiments have confirmed that distributed reception improves transmission quality. After being subjected to comparative analysis, the received data was later used for generating data with a reduced number of incorrect information. Further experiments, featuring a laboratory model, produced very detailed results that confirmed high quality of the author’s mathematical model of DGSS and the algorithms for link quality improvement. The author’s idea of RSN allows to implement it into currently operative systems, with such implementations are being done at present. RSN technologies may prove instrumental for overcoming technological barriers of contemporary and future antenna systems.
Thesis file
doktorat Stolarski.pdf 10.41 MB

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