Future wireless networks are expected to deliver ultra-high throughput for supporting emerging applications. In such scenarios, conventional Nyquist signaling may falter. As a remedy, faster-than-Nyquist (FTN) signaling facilitates the transmission of more symbols than Nyquist signaling without expanding the time-frequency resources. We provide an accessible and structured introduction to FTN signaling, covering its core principles, theoretical foundations, unique advantages, open facets, and its road map. Specifically, we present promising coded FTN results and highlight its compelling advantages in integrated sensing and communications (ISAC), an increasingly critical function in future networks. We conclude with a discussion of open research challenges and promising directions.

翻译：未来无线网络需提供超高吞吐量以支持新兴应用，传统奈奎斯特信号传输在此类场景中可能面临瓶颈。超奈奎斯特信号传输技术作为一种解决方案，能够在无需扩展时频资源的前提下，实现比奈奎斯特准则更高的符号传输速率。本文以清晰的结构化方式介绍FTN信号传输技术，涵盖其核心原理、理论基础、独特优势、待完善领域及发展路线图。具体而言，我们展示了编码FTN技术的潜力成果，并重点探讨其在集成感知与通信（ISAC）——这一在未来网络中日益关键的功能——中所展现的显著优势。最后，本文对当前面临的开放性研究挑战及潜在发展方向进行了深入讨论。