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- W2440962059 abstract "In Earth-to-Space communications, well-known propagation effects such as path loss and atmospheric loss can lead to fluctuations in the strength of the communications link between a satellite and its ground station. Additionally, the typically unconsidered effect of shadowing due to the geometry of the satellite and its solar panels can also lead to link degradation. As a result of these anticipated channel impairments, NASA's communication links have been traditionally designed to handle the worst-case impact of these effects through high link margins and static, lower rate, modulation formats. The work presented in this paper aims to relax these constraints by providing an improved trade-off between data rate and link margin through utilizing link adaptation. More specifically, this work provides a simulation study on the propagation effects impacting NASA's SCaN Testbed flight software-defined radio (SDR) as well as proposes a link adaptation algorithm that varies the modulation format of a communications link as its signal-to-noise ratio fluctuates. Ultimately, the models developed in this work will be utilized to conduct real-time flight experiments on-board the NASA SCaN Testbed." @default.
- W2440962059 created "2016-06-24" @default.
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- W2440962059 date "2016-03-01" @default.
- W2440962059 modified "2023-09-26" @default.
- W2440962059 title "Link adaptation for mitigating Earth-to-Space propagation effects on the NASA SCaN testbed" @default.
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- W2440962059 doi "https://doi.org/10.1109/aero.2016.7500706" @default.
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