超奈奎斯特传输技术：面向6G的应用价值与挑战

doi:10.11959/j.issn.1000-0801.2021222

摘要/Abstract

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。

关键词: 超奈奎斯特传输, 香农容量, 码间干扰

Abstract:

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.

Key words: faster-than-Nyquist signaling, Shannon capacity, inter-symbol interference

中图分类号:

TP393

苏鑫, 王森, 杨鸿文, 金婧, 王启星. 超奈奎斯特传输技术：面向6G的应用价值与挑战[J]. 电信科学, 2021, 37(9): 38-47.

Xin SU, Sen WANG, Hongwen YANG, Jing JIN, Qixing WANG. Faster-than-Nyquist signaling: value and challenges of 6G-oriented applications[J]. Telecommunications Science, 2021, 37(9): 38-47.

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