In-Orbit Measurements and Analysis of Radio Interference in the UHF Amateur Radio Band from the LUME-1 Satellite
| Autor: | Diego Hurtado de Mendoza, José Miguel Lago Agra, Gara Quintana-Diaz, Fernando Aguado Agelet, Torbjorn Ekman, Alberto González Muíño |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Computer science
Science 3325.06 Comunicaciones Por Satélite Communications system Electromagnetic interference UHF symbols.namesake Interference (communication) Telecommunications link radio interference 3325.05 Radiocomunicaciones Remote sensing Spectral density in-orbit measurements small satellite SDR (Software-Defined Radio) Additive white Gaussian noise Ultra high frequency stationarity symbols General Earth and Planetary Sciences Satellite 3325 Tecnología de las Telecomunicaciones time variability amateur radio band interference statistics |
| Zdroj: | Remote Sensing, Vol 13, Iss 3252, p 3252 (2021) Remote Sensing Volume 13 Issue 16 Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) |
| ISSN: | 2072-4292 |
| Popis: | Radio interference in the uplink makes communication to satellites in the UHF amateur radio band (430–440 MHz) challenging for any satellite application. Interference measurements and characterisation can improve the robustness and reliability of the communication system design. Most published results focus on average power spectrum measurements and heatmaps. We apply a low complexity estimator on an SDR (Software-Defined Radio) to study the interference’s dispersion and temporal variation on-board a small satellite as an alternative. Measuring the Local Mean Envelope (LME) variability with different averaging window lengths enables the estimation of time variability of the interference. The coefficient of variation for the LME indicates how much the signals vary in time and the spread in magnitudes. In this article, theoretical analysis, simulations, and laboratory results were used to validate this measurement method. In-orbit measurements were performed on-board the LUME-1 satellite. Band-limited interference with pulsed temporal behaviour and a high coefficient of variation was detected over North America, Europe, and the Arctic, where space-tracking radars are located. Wide-band pulsed interference with high time variability was also detected over Europe. These measurements show why operators that use a communication system designed for Additive White Gaussian Noise (AWGN) at power levels obtained from heatmaps struggle to command their satellites. Norges Forskningsråd | Ref. 270959 European Regional Development Fund | Ref. SOE1/P4/E0437 Ministerio de Economía, Industria y Competitividad | Ref. ESP2016-79184-R |
| Databáze: | OpenAIRE |
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