面向6G的共生散射通信技术:原理、方法与应用  

Symbiotic backscatter communications for 6G:principles,approaches,and applications

作　　者：张倩倩[1,2] 王俊 梁应敞[1] Qianqian ZHANG;Jun WANG;Ying-Chang LIANG(Center for Intelligent Networking and Communications,University of Electronic Science and Technology of China,Chengdu 611731,China;National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学智能通信与网络研究中心,成都611731 [2]电子科技大学通信抗干扰技术国家级重点实验室,成都611731

出　　处：《中国科学：信息科学》2022年第8期1393-1416,共24页Scientia Sinica(Informationis)

基　　金：国家自然科学基金(批准号:U1801261,61631005);国家重点研发计划(批准号:2018YFB1801105);高等学校学科创新引智计划(批准号:B20064)资助项目。

摘　　要：近年来,共生散射通信因其在频谱与能量域的互惠共享特性而受到广泛关注,为解决6G面临的频谱与能耗问题提供了潜在方案.在该技术中,次系统利用主系统的频谱及射频信号实现被动式反向散射通信,而次系统的传输为主系统提供额外的多径效应,有望提升主系统的性能.本文首先介绍共生散射通信的基本概念及技术原理,然后从信息论基础、接收机设计、资源配置,以及多用户接入4个方面综述该技术的研究现状.在此基础上,讲述可重构智能表面(reconfigurable intelligent surface,RIS)在共生散射通信系统中的应用,分析并总结了引入RIS为共生散射通信带来的性能增益.最后介绍了融合共生散射通信的6G架构及应用前景,并探讨了共生散射通信面临的技术挑战.In recent years,due to the mutualistic sharing of spectrum and energy,symbiotic backscatter communications have attracted considerable attention and provided a potential solution to the spectrum and energy issues in 6G.In symbiotic backscatter communications,the secondary system uses the spectrum and radio frequency signal of the primary system for passive backscatter transmission.Meanwhile,the secondary transmission provides additional multipath to the primary system,which is expected to improve the performance of the primary system.First,the basic concepts and technical principles of symbiotic backscatter communications are introduced.Second,an overview of symbiotic backscatter communications is provided from the aspects of information theory,receiver design,resource allocation,and multiuser access.Third,the applications of the reconfigurable intelligent surface(RIS)in symbiotic backscatter communications are described,and the benefits brought by the introduction of RIS for symbiotic backscatter communications are analyzed and summarized.Finally,the 6G architecture and the application prospects of integrating the symbiotic backscatter communication are illustrated,and the challenges of the symbiotic backscatter communications are discussed.

关 键 词：6G 共生散射通信 可重构智能表面 互惠共生 频谱效率 能量效率 

分 类 号：TN926[电子电信—通信与信息系统]