{"ID":2872996,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2509.07610","arxiv_id":"2509.07610","title":"Asymmetric Modulation Design for Fluid-Antenna SWIPT Systems","abstract":"In this work, we propose the design of modulation schemes that improve the rate-energy region of fluid antenna-assisted simultaneous wireless information and power transfer (SWIPT) systems. By considering the nonlinear characteristics of practical energy harvesting circuits, we formulate a dual-objective rate-energy (RE) region optimization problem to jointly maximize the discrete-input mutual information (DIMI) and harvested current. The problem is solved using the epsilon-constraint method and optimized constellations are designed for various energy harvesting thresholds. We then evaluate the performance of the optimized constellations under three different fluid antenna (FA) port selection strategies: (i) Best Port, (ii) Fixed Port, and (iii) Random Port. Our simulation results demonstrate significant performance gains of optimized constellations over conventional constellations in both information rate and energy harvesting.","short_abstract":"In this work, we propose the design of modulation schemes that improve the rate-energy region of fluid antenna-assisted simultaneous wireless information and power transfer (SWIPT) systems. By considering the nonlinear characteristics of practical energy harvesting circuits, we formulate a dual-objective rate-energy (R...","url_abs":"https://arxiv.org/abs/2509.07610","url_pdf":"https://arxiv.org/pdf/2509.07610v1","authors":"[\"Ahsan Mehmood\",\"Ioannis Krikidis\",\"Ghassan M. Kraidy\"]","published":"2025-09-09T11:35:02Z","proceeding":"eess.SP","tasks":"[\"eess.SP\",\"math.NA\"]","methods":"[]","has_code":false}