LEO SATELLITE BEAMFORMING FOR NGSO-GSO INTERFERENCE MITIGATION

The coexistence of low earth orbit (LEO) and
geostationary orbit (GSO) satellites in shared fre-
quency bands might compromise the legacy GSO
systems. In response to this concern, we propose
a beamforming scheme aimed at facilitating spec-
trum sharing between LEO and GSO networks. The
proposed scheme addresses the critical challenge
of mitigating interference caused by LEO satellites
to GSO receiver systems through the application
of on-board beamforming techniques assuming a
phased array antenna. By creating nulls in the
directions of GSO receivers, the proposed method
effectively reduces the interference-to-noise ratio
(INR) experienced by the ground GSO receivers.
The results of our study highlight the importance of
interference mitigation with beamforming, enabling
the seamless coexistence and improved spectrum
utilization between GSO systems and LEO satellite
constellations.