An SDR-based MEO testbed shows that uplink differential Doppler and payload phase noise significantly degrade precoding, and a sample-based phase compensation loop recovers most of the precoding gain.
Multiuser-MISO Precoding under Channel Phase Uncertainty in Satellite Communication Systems,
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Demonstrator Testbed for Effective Precoding in MEO Multibeam Satellites
An SDR-based MEO testbed shows that uplink differential Doppler and payload phase noise significantly degrade precoding, and a sample-based phase compensation loop recovers most of the precoding gain.