Weijie Yuan (Southern University of Science and Technology, China); Zhiqiang Wei (Xi'an Jiaotong University, China); Shuangyang Li (Technical University of Berlin, Germany)
Abstract:
Future wireless networks are envisioned to support ubiquitous connectivity to a wide range of emerging applications, spanning from autonomous cars to unmanned aerial/underwater vehicles. This requires novel wireless technology to provide highly reliable data transmission and highly robust sensing simultaneously. However, the strong multipath, high delay, and Doppler features in high-mobility environments can impose great challenges for reliable wireless communications and robust sensing. Consequently, the conventional orthogonal frequency division multiplexing modulation may fail due to the high dynamical channel fluctuations. The recently proposed orthogonal time frequency space modulation has provided a fundamentally different perspective of waveform design in the delay-Doppler (DD) domain in contrast to the conventional time-frequency (TF) domain designs. Since both functionalities can be unified in the same domain, promising performance over various channels has been shown and the advantages have been widely evident from both academic and industry perspectives. This tutorial aims to provide a comprehensive understanding of the DD domain communications and sensing with specific focuses on its fundamentals, advanced designs, performance analysis, and applications. In this tutorial, we will first overview the background and fundamentals of DD communications and sensing. As a step further, we will introduce the state-of-the-art research progress on this topic, which consists of 3 technical parts: 1) Fundamentals of DD domain communications, 2) Recent advances of DD domain multiple-input multiple-output (MIMO) communications, and 3) DD domain communications with integrated sensing functionality. Finally, we will conclude the tutorial by summarizing the future directions and open problems of DD domain communications and sensing.
Short bios:
Weijie Yuan (Member, IEEE) received the B.E. degree from the Beijing Institute of Technology, China, in 2013, and the Ph.D. degree from the University of Technology Sydney, Australia, in 2019. In 2016, he was a Visiting Ph.D. Student with the Institute of Telecommunications, Vienna University of Technology, Austria. He was a Research Assistant with the University of Sydney, a Visiting Associate Fellow with the University of Wollongong, and a Visiting Fellow with the University of Southampton, from 2017 to 2019. From 2019 to 2021, he was a Research Associate with the University of New South Wales. He is currently an Assistant Professor with the Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China. He currently serves as an Associate Editor for the IEEE Transactions on Green Communications and Networking and the IEEE Communications Letters, an Associate Editor as well as an Award Committee Member for the EURASIP Journal on Advances in Signal Processing. He has led the guest editorial teams for special issues in IEEE Communications Magazine and China Communications. He was an Organizer/the Chair of several workshops, special sessions, and tutorials on orthogonal time frequency space (OTFS) and integrated sensing and communication (ISAC) in flagship IEEE and ACM conferences, including IEEE ICC, IEEE/CIC ICCC, IEEE SPAWC, IEEE VTC, IEEE WCNC, IEEE ICASSP, and ACM MobiCom. He is the Founding Chair of the IEEE ComSoc Special Interest Group on Orthogonal Time Frequency Space (OTFS-SIG). He was listed in the World's Top 2% Scientists by Stanford University for citation impact in 2022. He was a recipient of the Best Ph.D. Thesis Award from the Chinese Institute of Electronics, an Exemplary Reviewer Award from IEEE Transactions on Communications and IEEE Wireless Communications Letters, and a Best Editor Award from IEEE Communications Letters.
Zhiqiang Wei (Member, IEEE) received the B.E. degree in information engineering from Northwestern Polytechnical University (NPU), Xi'an, China, in 2012, and the Ph.D. degree in electrical engineering and telecommunications from the University of New South Wales (UNSW), Sydney, Australia, in 2019. From 2019 to 2021, he was a Postdoctoral Research Fellow with UNSW. From 2021-2022, he was a Humboldt Postdoctoral Research Fellow with the Institute for Digital Communications, Friedrich-Alexander University ErlangenNuremberg (FAU), Erlangen, Germany. He is currently a full Professor with the School of Mathematics and Statistics, Xi'an Jiaotong University, Xi'an, China. He received the Best Paper Awards at the IEEE International Conference on Communications (ICC), 2018. He is the founding co-chair (publications) of the IEEE ComSoc special interest group on OTFS (OTFS-SIG). He has been serving as the TPC Co-Chair of the IEEE ICC 2021 Workshop on OTFS, the IEEE ICC 2022 Workshop on OTFS, and IEEE International Conference on Communications in China (ICCC) 2021 Workshop on OTFS. He was recognized as an Exemplary Reviewer of IEEE Transactions on Communications during 2017-2020 and IEEE Transactions on Wireless Communications in 2017 and 2018.
Shuangyang Li (Member, IEEE) received the B.S., M.S., and Ph.D. degrees from Xidian University, China, in 2013, 2016, and 2021, respectively. He received his second Ph.D. degree from the University of New South Wales (UNSW), Australia, in 2022. He is a recipient of the Marie Skłodowska-Curie Actions (MSCA) fellowship 2022 and is currently a research associate at the Technical University of Berlin (TU-Berlin). Prior to that, he was a research associate at the University of Western Australia (UWA). He was the organizer/chair for several workshops and tutorials on related topics of orthogonal time frequency space (OTFS) in IEEE flagship conferences, including IEEE ICC, IEEE WCNC, IEEE VTC, and IEEE ICCC. He was also the co-author of the IEEE ComSoc Best Readings on OTFS and Delay Doppler Signal Processing. He has regularly served as a reviewer for various IEEE journals, as well as a TPC member for IEEE flagship conferences. He was a recipient of the 2021 student travel grant of IEEE International Conference on Communications (ICC) and an exemplary reviewer for IEEE Transactions on Communications 2022 and IEEE Communication Letters 2022. He is also a founding member and currently the secretary of the special interest group (SIG) on OTFS. His research interests include signal processing, channel coding, and their applications to communication systems, with a specific focus on waveform designs.