STAR-RIS-Assisted Multicast Communications in DFRC-UAV-Enabled ISAC Systems

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-11-25 DOI:10.1109/LCOMM.2024.3505896

Longshen Chen;Jia Zhu;Yulong Zou;Yulei Lou;Yizhi Li

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引用次数: 0

Abstract

In this letter, we study a dual-function radar-communication unmanned aerial vehicle (DFRC-UAV)- enabled integrated sensing and communications (ISAC) system, and propose a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted DFRC-UAV-enabled ISAC scheme called SRaDUI, where a DFRC-UAV simultaneously senses ground targets and multicasts information to users assisted by a STAR-RIS. To improve the multicast capacity, we formulate an achievable rate maximization problem by jointly designing the scheduling of targets, the covariance matrices of the transmitted symbol vectors, the STAR-RIS coefficients, and the DFRC-UAV trajectory. To address this non-convex problem, we propose an alternating optimization (AO) based iterative algorithm, decomposing the original problem into a series of subproblems, which can be solved alternately to obtain suboptimal solutions based on the semidefinite relaxation (SDR) and successive convex approximation (SCA). Numerical results demonstrate the superiority of the proposed SRaDUI scheme and the effectiveness of the designed iterative algorithm.

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星- ris辅助多播通信在dfrc - uav支持的ISAC系统中

在本文中，我们研究了一种双功能雷达-通信无人机（DFRC-UAV）集成传感和通信（ISAC）系统，并提出了一种同时发射和反射可重构智能表面（STAR-RIS）辅助DFRC-UAV的ISAC方案，称为SRaDUI，其中DFRC-UAV同时感知地面目标并在STAR-RIS的协助下向用户发送信息。为了提高组播容量，我们通过联合设计目标调度、传输符号矢量协方差矩阵、STAR-RIS系数和DFRC-UAV弹道，提出了一个可实现的速率最大化问题。为了解决这一非凸问题，我们提出了一种基于交替优化（AO）的迭代算法，将原问题分解为一系列子问题，这些子问题可以基于半定松弛（SDR）和逐次凸逼近（SCA）交替求解以获得次优解。数值结果证明了所提出的SRaDUI方案的优越性和所设计迭代算法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.