无线电通信技术2024，Vol.50Issue(5)：958-966,9.DOI:10.3969/j.issn.1003-3114.2024.05.014
RIS辅助的ISAC系统抗多径衰落及路径损耗方法研究
Research on Methods for Mitigating Multipath Fading and Path Loss in ISAC RIS-assisted Systems
摘要
Abstract
As an important part of the future intelligent transportation system,the Internet of Vehicles has increasingly high re-quirement for communication and perception.Integrated Sensing and Communication(ISAC),as a promising technology in Internet of Vehicles,has attracted widespread attention in the industry because it can solve the problem of location perception in communication scenarios.Due to the more random and uncontrollable electromagnetic environment in urban scenarios,the current traditional communi-cation system architecture can no longer meet the communication and perception needs in Vehicle-to-Infrastructure(V2I)system.In response to this,this paper considers adding a Reconfigurable Intelligent Surface(RIS)to traditional V2I system,combining it with ISAC technology,and constructing a new passive perception model under multipath scenarios.Then,it deeply analyzes the optimization of the anti-multipath performance of the RIS-assisted ISAC communication system under a new passive perception model.A large-scale RIS unit optimization grouping method is proposed,which allows some units to participate in signal reflection,and then compares the system performance of the large-scale RIS after unit optimization grouping with the small-scale RIS with the same number of units.Sim-ulation results show that the optimized design of large-scale RIS achieves a signal transmission efficiency of about 1.5 bit/s higher than that of small-scale RIS,effectively reducing the channel estimation overhead while improving the system signal transmission performance.关键词
通信感知一体化/智能反射面/多径/路径损耗Key words
ISAC/RIS/multipath/path loss分类
信息技术与安全科学引用本文复制引用
于飞桥,陈志敏,陈鹏..RIS辅助的ISAC系统抗多径衰落及路径损耗方法研究[J].无线电通信技术,2024,50(5):958-966,9.基金项目
上海市自然科学基金面上项目(22ZR1425200) General Program of Shanghai Municipal Natural Science Foundation of China(22ZR1425200) （22ZR1425200）
