Waveform Design for Integrated Sensing and Communication Systems Based on Interference Exploitation

作     者：Tian Liu Yinghong Guo Lingfeng Lu Bin Xia 

作者机构：Southwest China Institute of Electronic TechnologyChengdu 610036China Institute of Wireless Communications Technology(IWCT)and Shanghai Key Laboratory of Digital Media Processing and TransmissionShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Journal of Communications and Information Networks》 (通信与信息网络学报（英文）)

年 卷 期：2022年第7卷第4期

页      面：447-456页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：This work is supported in part by Shanghai Municipal Science and Technology Major Project under Grant 2021SHZDZX0102 

主　　题：ISAC CI waveform design Cramer-Rao bound 

摘      要：Integrated sensing and communication(ISAC)is a spectrum and energy efficient approach to realizing dual functions by a unified hardware *** this paper,we consider a multiple-input multiple-output(MIMO)ISAC system,where the transmitted waveform consisting of communication signals and dedicated sensing signal is optimized for dual purposes of estimating targets and serving downlink single-antenna ***,the sensing interference and multi-user interference are exploited,rather than suppressed,by the waveform design *** joint waveform design problem is formulated by maximizing the constructive interference(CI)while ensuring the power budget and waveform similarity error with the benchmark signal,which limits the sensing estimation *** obtain the benchmark signal which achieves the optimal estimation performance,we propose a semidefinite relaxation based algorithm to solve the optimization *** clarity,we derive the real representation of the complex joint waveform design problem and prove its *** results verify the superiority of the proposed CI-based waveform design when the interference was efficiently exploited as a useful signal source achieving favorable symbol error ratio ***,the dedicated sensing signal provides more degree of freedom for waveform design.