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http://dx.doi.org/10.5139/JKSAS.2021.49.6.489

Interference Analysis Between LEO Satellites for X-band Downlink  

Choo, Moogoong (Agency for Defense Development)
Hwang, Inyoung (Agency for Defense Development)
Bae, Minji (Agency for Defense Development)
Seo, Inho (Agency for Defense Development)
Ryu, Youngjae (Agency for Defense Development)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.49, no.6, 2021 , pp. 489-496 More about this Journal
Abstract
The X-band frequencies for transmitting the data from earth observation satellites are limited, so a number of satellites share the frequency bands. In order for multiple satellites to utilize same or adjacent frequency bands, International Telecommunication Union - Radiocommunication (ITU-R) limits power flux density (PFD), which overcomes the interferences among multiple satellites. However, even under the regulation, the interference effect needs to be analyzed when multiple satellites are connected to communicate with multiple ground stations (GSs) located close to each other. In this paper, the interference effect is analyzed based on signal to interference plus noise ratio (SINR) when two low earth orbit (LEO) satellites operating in different orbits are connected to communicate with randomly located two GSs in Korean peninsula. From the analysis results, it is confirmed that there can be interferences during 365 days operation even if the satellites meet PFD requirement, but the periods under interference effects are short and the interference can be foreseen.
Keywords
Low Earth Orbit; RF Interference; Signal to Interference Plus Noise Ratio; Offset Angle; Link Budget; Power Flux Density;
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