Movable Antenna Enhanced Secure Simultaneous Wireless Information and Power Transfer

In this letter, we investigate a secure simultaneous wireless information and power transfer (SWIPT) system with movable antennas (MAs). To improve the energy harvesting (EH) while ensuring physical layer security (PLS), we aim to maximize the harvested energy by jointly optimizing the transmit beamforming vectors, artificial noise (AN) covariance matrix, and MA positions. To solve this non-convex problem, we propose a block coordinate descent (BCD) algorithm based on successive convex approximation (SCA) technique. Numerical results show that the proposed method converges fast and achieves significant performance improvement in terms of the harvested energy compared to other benchmarks.