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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2509.07610 |
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| _version_ | 1866912578470412288 |
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| author | Mehmood, Ahsan Krikidis, Ioannis Kraidy, Ghassan M. |
| author_facet | Mehmood, Ahsan Krikidis, Ioannis Kraidy, Ghassan M. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_07610 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Asymmetric Modulation Design for Fluid-Antenna SWIPT Systems Mehmood, Ahsan Krikidis, Ioannis Kraidy, Ghassan M. Signal Processing Numerical Analysis 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. |
| title | Asymmetric Modulation Design for Fluid-Antenna SWIPT Systems |
| topic | Signal Processing Numerical Analysis |
| url | https://arxiv.org/abs/2509.07610 |