基于去蜂窝毫米波MIMO的通感一体化混合波束设计  

Hybrid beamforming for ISAC based on mmWave cell-free MIMO

作　　者：朵琳[1] 杨新 任勇 许渤雨 DUO Lin;YANG Xin;REN Yong;XU Boyu(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650031,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650031

出　　处：《西北工业大学学报》2024年第5期903-911,共9页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(61962032)资助。

摘　　要：针对通信频谱资源的匮乏以及去蜂窝MIMO在资源利用方面的优势,提出了一种毫米波(millimeter-wave,mmWave)场景下的去蜂窝MIMO通感一体化(intergraded sensing and communication,ISAC)系统。在该系统中,基站为用户提供服务的同时,多天线用户设备能够主动检测多个目标。研究目标是设计模拟和数字波束形成器,以优化通信和雷达波束形成误差的加权和。研究中考虑了2种功率约束,并采用改进的正交匹配追踪算法和黎曼共轭梯度算法进行优化。对通信频谱效率和雷达波束方向图进行仿真分析,结果表明,混合波束方案能在频谱利用和波束指向方面实现折中的性能,这种方案对于提高系统性能具有潜在的应用前景。Aiming at the scarcity of communication spectrum resources and the advantages of cell-free MIMO in resource utilization,a millimeter-wave cell-free MIMO-ISAC system is proposed.In this system,while the base station provides services for users,the multi-antenna user equipment can actively detect multiple targets.The research goal is to design analog and digital beamformers to optimize the weighted sum of communication and radar beamforming errors.Two kinds of power constraints are considered in the study,and the improved orthogonal matching pursuit algorithm and the Riemann conjugate gradient algorithm are used for optimization.Through the simulation analysis of the communication spectrum efficiency and the radar beam pattern,the results show that the hybrid beam scheme can achieve a compromise performance in terms of spectrum utilization and beam pointing,and this scheme has potential application prospects for improving system performance.

关 键 词：毫米波 通感一体化 混合波束赋形 去蜂窝MIMO 

分 类 号：TN928[电子电信—通信与信息系统]