Study of attenuation and loss of messages in radiofrequency communication links between Cubesats and Earth
| Autor: | Pozo Díaz, Xavier |
|---|---|
| Přispěvatelé: | Gago Barrio, Javier, Sureda Anfres, Miquel, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Link budget
Satèl·lits artificials en telecomunicació Cubesats Estacions terrestres (Telecomunicació per satèl·lit) Radiofreqüència Simulació per ordinador Radio frequency LEO orbit Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços [Àrees temàtiques de la UPC] Computer simulation Earth stations (Satellite telecommunication) Artificial satellites in telecommunication Radio communications |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | This project aims to study the quality of communication using nanosatellites in LEO orbits. The objective is to study the signal attenuation by radio frequency (RF) antennas between a nanosatellite and a ground station, or another nanosatellite. For this purpose, a MATLAB simulator is developed that allows the modeling of satellite orbits by using TLEs, orbital elements or Walker constellations. As for the communication parameters, different transmission frequencies and atmospheric propagation models can be used. As for the antennas, two different types are used: parabolic reflectors for ground stations and patch antennas for satellites. The quality of a communication link is determined by two different methods: using the received power or the signal-to-noise ratio in reception. In the case of received power, this should be higher than the sensitivity of the transceiver under study, while signal-to-noise takes into account different digital modulations that determine the probability of message loss. Thanks to this simulator, it is possible to obtain results that determine the visibility times between satellites and/or ground stations, and to determine if the communication for a given link meets the minimum communication requirements, as well as to calculate the transmission power necessary to meet these requirements. It also performs a 3D representation in which the orbits of the satellites as well as the ground stations can be observed. |
| Databáze: | OpenAIRE |
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