节能star - ris辅助ISAC系统的联合定位和波束成形设计

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-11-20 DOI:10.1109/LCOMM.2024.3503754

Qin Zhang;Han Wu;Hai Li;Zhengyu Song;Shujuan Hou

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引用次数: 0

摘要

在这封信中，我们研究了一个同时发射和反射可重构智能表面（STAR-RIS）辅助集成传感和通信（ISAC）系统。我们的目标是通过共同优化基站波束形成、STAR-RIS的发射/反射系数矩阵以及STAR-RIS的部署位置，使ISAC系统的能源效率（EE）最大化。由于公式化问题是非凸的，我们提出了一种将原问题分解为三个子问题的替代优化方案，其中子问题的求解基于半定松弛（SDR）和分数规划。仿真结果表明，STAR-RIS辅助ISAC系统获得了比传统RIS方案更高的EE，并且STAR-RIS的位置优化可以显著提高系统EE。此外，当雷达波束方向图增益阈值增大时，电子效率迅速下降。

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Joint Location and Beamforming Design for Energy Efficient STAR-RIS-Aided ISAC Systems

In this letter, we investigate a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided integrated sensing and communication (ISAC) system. Our object is to maximize the energy efficiency (EE) of the ISAC system by jointly optimizing the beamforming at the base station (BS), the transmitting/reflecting coefficient matrices of the STAR-RIS, as well as the deployment location of the STAR-RIS. Since the formulated problem is non-convex, we propose an alternative optimization scheme by decomposing the original problem into three sub-problems, where the sub-problems are solved based on semidefinite relaxation (SDR) and fractional programming. Simulation results demonstrate that the STAR-RIS aided ISAC system achieves a higher EE than conventional RIS scheme, and the location optimization for STAR-RIS can significantly improve the system EE. Furthermore, the EE declines rapidly when the radar beampattern gain threshold increases to a larger value.

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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.