A CAPA downlink secrecy-rate optimization is solved by an FP-BCD algorithm with closed-form continuous current patterns, plus a zero-leakage ZF heuristic, though the key equivalence step is flawed.
Pattern-division multiplexing for multi-user continuous-aperture MIMO,
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Secure Beamforming for Continuous Aperture Array (CAPA) Systems
A CAPA downlink secrecy-rate optimization is solved by an FP-BCD algorithm with closed-form continuous current patterns, plus a zero-leakage ZF heuristic, though the key equivalence step is flawed.