移动通信2024，Vol.48Issue(3)：61-65,74,6.DOI:10.3969/j.issn.1006-1010.20240118-0001
RIS辅助通感一体化:波束成形和反射相移的联合设计
RIS-assisted Integrated Sensing and Communication:Joint Design of Beamforming and Reflection Phase Shift
摘要
Abstract
Integrated sensing and communication(ISAC)is recognized as a promising solution to alleviate spectrum congestion in future wireless networks by enabling the sharing of spectral resources between communication and radar systems.However,the performance gains obtained solely from base station antennas are limited under severe channel conditions.Reconfigurable intelligent surfaces(RIS),capable of creating favorable propagation environments,have emerged as a disruptive technique.The introduction of RIS in ISAC systems provides additional links,thereby enhancing overall system performance.This paper proposes a joint design of active beamforming at the base station and reflection phase shifts at the RIS to maximize the weighted sum rate and radar detection power in the RIS-assisted ISAC system.An alternating optimization algorithm based on weighted mean square error and fractional programming is further developed to address this optimization problem.Simulation results confirm that deploying RIS in ISAC systems and optimizing its phase shifts can effectively improve the performance of both communication and sensing functionalities.关键词
通信感知一体化/可重构智能表面/波束成形设计/反射相移设计Key words
integrated sensing and communication(ISAC)/reconfigurable intelligent surface(RIS)/beamforming design/reflection phase shift design分类
电子信息工程引用本文复制引用
陶启慧,粟欣,刘蓓,许希斌..RIS辅助通感一体化:波束成形和反射相移的联合设计[J].移动通信,2024,48(3):61-65,74,6.基金项目
国家重点研发计划项目"6G网络智能化技术研究"(2020YFB1806702) （2020YFB1806702）
