有源RIS辅助的近海双功能雷达通信系统性能优化  

Performance optimization of active RIS-assisted near-shore dual-function radar communicaiton system

作　　者：徐淼 岳殿武[1] 孙玉 武祥凯 袁猛 XU Miao;YUE Dianwu;SUN Yu;WU Xiangkai;YUAN Meng(School of Information Science and Technology,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学信息科学技术学院,辽宁大连116026

出　　处：《电信科学》2025年第1期88-98,共11页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.62301108);辽宁省应用基础研究计划项目(No.2023JH26/10300010)。

摘　　要：针对近海水域船舶用户通信质量差、雷达探测需求大、频谱资源稀缺的问题,研究了一种船载有源智能反射面(active reconfigurable intelligent surface,ARIS)辅助的近海双功能雷达通信(dual-function radar communication,DFRC)系统。为符合海上信道特性,采用了考虑海上蒸发波导影响的三射线路径损耗模型和双径弥散功率(two wave with diffuse power,TWDP)信道,并提出了一种基于分式规划理论和拉格朗日算子法的交替优化算法。在雷达探测功率约束下,通过优化基站的波束成形与ARIS的反射矩阵向量,最大化用户的加权和速率。仿真结果表明,所提算法具有良好的收敛性,相较无源RIS辅助的DFRC系统,在探测功率相同时,有源RIS辅助的近海DFRC系统可以显著地提高船舶用户的加权和速率。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 frac‐tional 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 re‐flection matrix vector of the ARIS.Simulation results show that the proposed algorithm has good convergence proper‐ties.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.

关 键 词：双功能雷达通信系统 智能反射面 波束成形 

分 类 号：TN925[电子电信—通信与信息系统]