Adaptive Coding and Modulation Experiment using NASA's Space Communication and Navigation Testbed
| Autor: | Joseph Downey, Dale Mortensen, Michael Evans, Janette Briones, Nicholas Tollis |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Testbed Real-time computing 020206 networking & telecommunications 02 engineering and technology Data link Adaptive coding Telecommunications link Digital Video Broadcasting International Space Station 0202 electrical engineering electronic engineering information engineering Electronic engineering Data system Air navigation business |
| Zdroj: | 34th AIAA International Communications Satellite Systems Conference. |
| DOI: | 10.2514/6.2016-5736 |
| Popis: | National Aeronautics and Space Administration (NASA)'s Space Communication and Navigation Testbed is an advanced integrated communication payload on the International Space Station. This paper presents results from an adaptive coding and modulation (ACM) experiment over S-band using a direct-to-earth link between the SCaN Testbed and the Glenn Research Center. The testing leverages the established Digital Video Broadcasting Second Generation (DVB-S2) standard to provide various modulation and coding options, and uses the Space Data Link Protocol (Consultative Committee for Space Data Systems (CCSDS) standard) for the uplink and downlink data framing. The experiment was conducted in a challenging environment due to the multipath and shadowing caused by the International Space Station structure. Several approaches for improving the ACM system are presented, including predictive and learning techniques to accommodate signal fades. Performance of the system is evaluated as a function of end-to-end system latency (round-trip delay), and compared to the capacity of the link. Finally, improvements over standard NASA waveforms are presented. |
| Databáze: | OpenAIRE |
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