Enhancing physical layer security in MA-enabled MIMO systems via pilot-aided codebook-based artificial noise

Résumé fourni par la source

This letter proposes a novel integration of pilot-based codebook artificial noise (PCAN) into movable-antenna (MA)- enabled MIMO systems. Unlike existing works that treat artificial noise design and antenna position optimization separately, we uniquely formulate and solve the joint optimization of transmit covariance matrices and antenna positions to maximize secrecy capacity (SC). The core novelty lies in: (i) the first application of PCAN to MA-MIMO to eliminate legitimate-link interference without requiring noise orthogonality, and (ii) an alternating optimization (AO) framework with sequential convex programming (SCP) that linearizes the non-convex coupling between channel matrices and antenna positions. Simulations demonstrate substantial SC gains, offering a viable strategy for strengthening physical layer security.

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