超奈奎斯特传输技术:面向6G的应用价值与挑战  

Faster-than-Nyquist signaling:value and challenges of 6G-oriented applications

作　　者：苏鑫 王森 杨鸿文[2] 金婧 王启星 SU Xin;WANG Sen;YANG Hongwen;JIN Jing;WANG Qixing(China Mobile Research Institute,Beijing 100053,China;Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]中国移动通信有限公司研究院,北京100053 [2]北京邮电大学信息与通信工程学院,北京100876

出　　处：《电信科学》2021年第9期38-47,共10页Telecommunications Science

摘　　要：超奈奎斯特(FTN)传输技术通过压缩发送符号时域/频域间隔,在一个符号周期内重叠发送多流数据,从而打破了奈奎斯特脉冲波形的正交性,实现了在有限带宽内传输更多数据的目的。首先,阐述了FTN的技术原理,梳理了其发展现状;其次,分析相关的关键性问题——明确了FTN容量与香农容量的关系,以及相关技术的内在联系;最后,讨论了FTN在6G通信中的应用可能性,提出了其应用价值和挑战:FTN是一种可逼近香农容量的高谱效传输方案,但接收机复杂度过高可能成为其在6G应用中的关键阻碍。The faster-than-Nyquist(FTN)signaling technology overlaps multiple streams of data within a symbol period by compressing the transmit symbol time/frequency-domain interval,thus breaking the orthogonality of the Nyquist pulse waveform and achieving the purpose of transmitting more data in a limited bandwidth.A relatively comprehensive explanation of the technical principles of FTN was elaborated,its development status was sorted out,and the related key questions——the relationship between FTN capacity and Shannon capacity,and the intrinsic connection of related technologies were answered.Finally,The possibility of FTN application in 6G was discussed,and its value and challenges in 6G were presented.That is,FTN is a highly spectrally efficient transmission scheme that approximates Shannon's capacity,but excessive receiver complexity may be a key impediment to its use in 6G applications.

关 键 词：超奈奎斯特传输 香农容量 码间干扰 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]