（北京理工大学通信技术研究所，中国 北京 100081）
RIS-Assisted Integrated Sensing and Communications
XIA Fanghao, WANG Xinyi, ZHENG Zhong
(Research Institute of Communication Technology, Beijing Institute of
Technology, Beijing 100081, China)
Abstract: Through the systematic introduction of the concept, the development, the application scenarios, and the state of the art of the re⁃
configurable intelligent surface (RIS) assisted integrated sensing and communications (ISAC), it is believed that the performance of the current ISAC is passively constrained by the wireless electromagnetic environment in beam design, resource scheduling and communication security. By actively reconfiguring the characteristics of the wireless channels, RIS introduces an additional spatial degree of freedom to improve the capabilities of the traditional sensing and communications, which enhances multiple performance metrics of ISAC systems, including communication rate, interference cancellation, the trade-off between radar and communication, and communication security. Such improvements provide high-precision sensing and broad-coverage communication for future vertical use cases, such as intelligent transportation, the smart factory, and the unmanned aerial vehicle networks.
Keywords: ISAC; RIS; interference cancellation; communication security