Doppler Shift in Precoded Cooperative Multi-Gateway Satellite Systems: Effects and Mitigation

Very High Throughput Satellite (VHTS) systems are typically deployed in Geostationary (GEO) orbit to benefit from the ubiquitous coverage of such orbits. Although the satellites deployed in GEO orbits appear as a static point in the sky from the on-ground user perspective, in practice, the GEO satel...

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Bibliographic Details
Main Authors: Gonzalez-Rios, Jorge L., Martinez-Marrero, Liz, Lagunas, Eva, Krivochiza, Jevgenij, Garces-Socarras, Luis M., Palisetty, Rakesh, Duncan, Juan M., Chatzinotas, Symeon
Format: Conference Proceeding
Language:English
Subjects:
centralized gateway
Doppler effect
Doppler shift
geostationary orbit
Logic gates
multi-beam satellite
multi-gateway system
Orbits
Precoding
Satellite broadcasting
software-defined radio
Throughput
Time factors
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Summary:Very High Throughput Satellite (VHTS) systems are typically deployed in Geostationary (GEO) orbit to benefit from the ubiquitous coverage of such orbits. Although the satellites deployed in GEO orbits appear as a static point in the sky from the on-ground user perspective, in practice, the GEO satellite experiences a north-south drift due to the influence of the sun and moon. Such movement may cause a small Doppler effect in the signals sent from geographically distributed cooperative gateways, which may cause significant performance loss when exploiting DVB-S2X SF-Pilot fields and for precoding purposes. This paper presents the first work investigating the effect of GEO Doppler shift in precoded cooperative multi-gateway satellite systems. In addition, to compensate for the frequency variations produced by the GEO movement, we present and test a user-gateway closed-loop compensation procedure. Results using software-defined radio (SDR) in the Lab are provided to validate the proposed method.
ISSN:1558-2612
DOI:10.1109/WCNC57260.2024.10570931