Faster-than-Nyquist Signaling for Next-Generation Wireless: Principles, Applications, and Challenges

TL;DR

This paper introduces faster-than-Nyquist signaling as a promising approach to enhance wireless network throughput, discussing its principles, benefits, applications in integrated sensing and communications, and outlining future research challenges.

Contribution

It provides a comprehensive overview of FTN signaling, including its theoretical basis, advantages, and recent coded FTN results, highlighting its potential in next-generation wireless networks.

Findings

Promising coded FTN results demonstrated.

FTN offers advantages in integrated sensing and communications.

Open research challenges and future directions outlined.

Abstract

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.