  The growing demand for broader bandwidth in cellular networks has turned the
upper mid-band (7-24 GHz) into a focal point for expansion. However, the
integration of terrestrial cellular and incumbent satellite services,
particularly in the 12 GHz band, poses significant interference challenges.
This paper investigates the interference dynamics in terrestrial-satellite
coexistence scenarios and introduces a novel beamforming approach that
leverages available ephemeris data for dynamic interference mitigation. By
establishing spatial radiation nulls directed towards visible satellites, our
technique ensures the protection of satellite uplink communications without
markedly compromising terrestrial downlink quality. Through a practical case
study, we demonstrate that our approach maintains the satellite uplink
signal-to-noise ratio (SNR) degradation under 0.1 dB and incurs only a
negligible SNR penalty for the terrestrial downlink. Our findings offer a
promising pathway for efficient spectrum sharing in the upper mid-band,
fostering a concurrent enhancement in both terrestrial and satellite network
capacity.
