Joint Beamforming Design and Trajectory Optimization for UAV-Enabled Cell-Free ISAC MIMO Systems

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-06-09 DOI:10.1109/LCOMM.2025.3577697

Jincheng Zhong;Jilong Wu;Yaqi Li;Chenyu Zhang;Pengcheng Zhu

引用次数: 0

Abstract

This letter presents a comprehensive investigation into beamforming design and trajectory optimization for integrated sensing and communication (ISAC) systems under a cell-free architecture, supported by multiple unmanned aerial vehicles (UAVs). To effectively incorporate sensing into communication tasks, we propose an efficient tracking scheme based on the extended Kalman filter (EKF) to estimate the positions of mobile user equipments (UEs), which are then used for beamforming design and trajectory optimization. The originally complex non-convex optimization problem is decomposed into several tractable subproblems, which are efficiently addressed using the block coordinate descent (BCD) method and fractional programming (FP). Numerical simulations validate the effectiveness of the proposed framework, demonstrating notable improvements in both average sum-rate and sensing accuracy.

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无人机支持无小区ISAC MIMO系统联合波束形成设计与轨迹优化

这封信提出了一项全面的研究，在无蜂窝架构下，由多个无人机（uav）支持的集成传感和通信（ISAC）系统的波束形成设计和轨迹优化。为了有效地将传感融入通信任务中，我们提出了一种基于扩展卡尔曼滤波（EKF）的高效跟踪方案来估计移动用户设备（ue）的位置，然后将其用于波束形成设计和轨迹优化。将复杂的非凸优化问题分解为若干易处理的子问题，利用分块坐标下降法（BCD）和分式规划（FP）有效地求解这些子问题。数值模拟验证了该框架的有效性，表明在平均和速率和感知精度方面都有显著的提高。

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.