RIS Assisted Dual-Function Radar and Secure Communications Based on Frequency-Shifted Chirp Spread Spectrum Index Modulation

作     者：Xiaoping Jin Peng Zhang Chuan Wan Dingyou Ma Yudong Yao Xiaoping Jin;Peng Zhang;Chuan Wan;Dingyou Ma;Yudong Yao

作者机构：Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceCollege of Information EngineeringChina Jiliang UniversityHangzhou 310018China Key Laboratory of Universal Wireless CommunicationsMinistry of EducationSchool of Information and Communication EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China Electrical and Computer Engineering DepartmentStevens Institute of TechnologyHobokenNJ 07030USA 

出 版 物：《中国通信:英文版》 (China Communications)

年 卷 期：2023年第20卷第10期

页      面：85-99页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：supported by the National Science Fund for Young Scholars(Grant No.62201539) the Project of Innovation and Entrepreneurship Training for National Undergraduates(Grant No.202210356005) the project of Zhejiang University Student Science and Technology Innovation Activity Plan(Grant No.2023R409055) 

主　　题：index modulation secure communications ISAC DFRC reconfigurable intelligent surface 

摘      要：Reconfigurable intelligent surface(RIS)assisted dual-function radar communications(DFRC)system is a promising integrated sensing and communication(ISAC)technology for future *** this paper,we propose a scheme of RIS-assisted DFRC system based on frequency shifted chirp spread spectrum index modulation(RDFI)for secure *** proposed RDFI achieves the sensing and transmission of target location information in its radar and communication modes,*** both modes,the frequency-shifted chirp spread spectrum index modulation(FSCSS-IM)signal is used as the baseband signal for radar and communications,so that the signal sent by the radar also carries *** scheme implements the RIS-assisted beamforming in the communication mode through the azimuth information of the target acquired in the radar mode,so that the signal received from the eavesdropper is distorted in amplitude and *** addition,this paper analyzes the radar measurement accuracy and communication security of the FSCSS-IM signal using ambiguity function and secrecy rate(SR)analysis,*** results show that RDFI achieves both excellent bit error rate(BER)performance and physical layer security of communications.