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Orthogonal Time-Frequency Space Modulation: A Promising Next-Generation Waveform
IEEE Wireless Communications ( IF 12.9 ) Pub Date : 2021-08-06 , DOI: 10.1109/mwc.001.2000408
Zhiqiang Wei , Weijie Yuan , Shuangyang Li , Jinhong Yuan , Ganesh Bharatula , Ronny Hadani , Lajos Hanzo

Sixth-generation (6G) wireless networks are envisioned to provide global coverage for the intelligent digital society of the near future, ranging from traditional terrestrial to non-terrestri-al 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-dimension-al 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.

中文翻译:

正交时频空间调制:一种有前途的下一代波形

第六代 (6G) 无线网络有望在不久的将来为智能数字社会提供全球覆盖,从传统的地面网络到非地面网络,在高移动性场景中高载波频率的可靠通信将发挥作用一个至关重要的角色。在这种情况下,在第四代 (4G) 和新兴的第五代 (5G) 蜂窝系统以及 WiFi 网络中广泛使用的传统正交频分复用 (OFDM) 调制容易受到攻击。严重的多普勒扩散。在此背景下,本文旨在介绍一种最近提出的二维调制方案,称为正交时频空间 (OTFS) 调制,它通过在延迟多普勒域中调制信息方便地适应信道动态。本文提供了一个易于阅读的 OTFS 概述,重点介绍了其潜在动机和特定功能。介绍了 OTFS 的关键挑战和我们的初步结果。我们还讨论了 OTFS 在 6G 无线网络中的一系列有前景的研究机会和潜在应用。
更新日期:2021-09-14
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