Performance optimization of active RIS-assisted near-shore dual-function radar communicaiton system
To address the issues of poor communication quality, high demand for radar detection, and scarce scarcity of spectrum resources for maritime users in coastal waters, an offshore dual-function radar communication (DFRC) system assisted by a shipborne active reconfigurable intelligent surface (ARIS) w...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Beijing Xintong Media Co., Ltd
2025-01-01
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| Series: | Dianxin kexue |
| Subjects: | |
| Online Access: | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2025007/ |
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| Summary: | To address the issues of poor communication quality, high demand for radar detection, and scarce scarcity of spectrum resources for maritime users in coastal waters, an offshore dual-function radar communication (DFRC) system assisted by a shipborne active reconfigurable intelligent surface (ARIS) was studied. In order to align with the characteristics of maritime channels, a three-path loss model and a two wave with diffuse power (TWDP) channel considering the evaporative duct over the sea was employed. An alternating optimization algorithm based on fractional programming theory and the Lagrangian operator method was proposed. Under the constraint of radar detection power, the user’s weighting and rate were maximized by optimizing the beamforming of the base station and the reflection matrix vector of the ARIS. Simulation results show that the proposed algorithm has good convergence properties. Compared with the DFRC system assisted by a passive reflective intelligent surface (RIS), the ARIS-assisted coastal DFRC system can significantly improve the weighted sum rate of maritime users while maintaining the same detection power. |
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| ISSN: | 1000-0801 |