Jointly optimizing rotatable antenna orientations and transmit covariance under spherical constraints significantly increases MIMO channel capacity over fixed-orientation baselines.
Movable antennas for wireless commu- nication: Opportunities and challenges,
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Joint Transceiver Orientation Optimization for Rotatable-Antenna MIMO Capacity Maximization
Jointly optimizing rotatable antenna orientations and transmit covariance under spherical constraints significantly increases MIMO channel capacity over fixed-orientation baselines.