The Evolution of Faster-Than-Nyquist Signaling
The Evolution of Faster-Than-Nyquist Signaling
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DOI：
10.1109/access.2021.3088997
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发表时间：
2021
期刊：
影响因子：
3.9
通讯作者：
T. Ishihara;S. Sugiura;L. Hanzo
中科院分区：
文献类型：
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作者：
T. Ishihara;S. Sugiura;L. Hanzo
回顾了比奈奎斯特(FTN)信令50年来的进展。FTN信令在时间域中采用非正交密码元打包，以提高数据传输速率。在回顾了传统的基于奈奎斯特的信令收发器和FTN信令收发信令的系统模型之后，我们综述了FTN技术的发展，包括它们的低复杂度检测和信道估计。此外，除了经典的FTN信令原理之外，我们还介绍了最新的频域滤波和预编码辅助方案。当依赖于预编码时，FTN信令的信息速率变得与FTN特定的码间干扰矩阵的特征值相关，这为相关的信息论分析提供了统一的框架，并简化了专门为提高所获得的信息速率而设计的相关功率分配。我们证明了FTN信令方案与采用实际升余弦成形滤波器的定制功率分配相结合，达到了与理想矩形成形滤波器相关的香农容量。
The fifty-year progress of faster-than-Nyquist (FTN) signaling is surveyed. FTN signaling exploits non-orthogonal dense symbol packing in the time domain for the sake of increasing the data rate attained. After reviewing the system models of both the conventional Nyquist-based and FTN signaling transceivers, we survey the evolution of FTN techniques, including their low-complexity detection and channel estimation. Furthermore, in addition to the classic FTN signaling philosophy, we introduce the recent frequency-domain filtering and precoding aided schemes. When relying on precoding, the information rate of FTN signaling becomes related to the eigenvalues of an FTN-specific intersymbol interference matrix, which provides a unified framework for the associated information-theoretic analysis and simplifies the associated power allocation specifically designed for increasing the information rate attained. We show that the FTN signaling scheme combined with bespoke power allocation employing a realistic raised-cosine shaping filter achieves the Shannon capacity associated with ideal rectangular shaping filters.