2020/10/07 by Zhiqiang Wei, Weijie Yuan, Wei, Zhiqiang +11 · 1 voice · 26 citations
Computer Science · Engineering · Mathematics · #Advanced Wireless Communication Technologies #Channel (broadcasting) #Computer science #Context (archaeology) #Electronic engineering #Engineering #Geography #Modulation (music) #Multiplexing #Optical Wireless Communication Technologies #Orthogonal frequency-division multiplexing #PAPR reduction in OFDM #Physics #Telecommunications #Waveform #Wireless #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.2010.03344
published in arXiv (Cornell University) (Cornell University) · 9 pages, 6 figures, submitted to the possible magazine
openalex publication_date 2020/10/07 · arxiv created 2021/02/03 · arxiv updated 2021/02/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The sixth-generation (6G) wireless networks are envisioned to provide a global coverage for the intelligent digital society of the near future, ranging from traditional terrestrial to non-terrestrial networks, where reliable communications in high-mobility scenarios at high carrier frequencies would play a vital role. In such scenarios, the conventional orthogonal frequency division multiplexing (OFDM) modulation, that has been widely used in both the fourth-generation (4G) and the emerging fifth-generation (5G) cellular systems as well as in WiFi networks, is vulnerable to severe Doppler spread. In this context, this article aims to introduce a recently proposed two-dimensional modulation scheme referred to as orthogonal time-frequency space (OTFS) modulation, which conveniently accommodates the channel dynamics via modulating information in the delay-Doppler domain. This article provides an easy-reading overview of OTFS, highlighting its underlying motivation and specific features. The critical challenges of OTFS and our preliminary results are presented. We also discuss a range of promising research opportunities and potential applications of OTFS in 6G wireless networks.