SPS Webinar: ISAC-assisted Delay Doppler Communications in Vehicular Networks

Date: 12 July 2023
Time: 9:00 AM ET (New York Time)
Speaker(s): Dr. Weijie Yuan, Dr. Zhiqiang Wei, Dr. Shuangyang Li


Orthogonal time frequency space (OTFS) modulation, which relies on delay Doppler domain for communications, is a promising candidate for supporting reliable information transmission in high-mobility vehicular networks. In this talk, we will provide a general framework for integrated (radar) sensing and communication (ISAC) technique for assisting delay Doppler communications, including both uplink and downlink vehicular communication systems. Benefiting from the OTFS-ISAC signals, the roadside unit (RSU) is capable of simultaneously transmitting downlink information to the vehicles and estimating the sensing parameters of vehicles, e.g., locations and speeds, based on the reflected echoes. Then, relying on the estimated kinematic parameters of vehicles, the RSU can construct the topology of the vehicular network that enables the prediction of the vehicle stated in the following time instant. Consequently, the RSU can effectively formulate the transmit downlink beamformers according to the predicted parameters to counteract the channel adversity such that the vehicles can directly detect the information without the need of performing channel estimation. As for the uplink transmission, the RSU can infer the delays and Dopplers associated with different channel paths based on the aforementioned dynamic topology of the vehicular network. Thus, inserting guard space as in conventional methods are not needed for uplink channel estimation which removes the required training overhead.


Fan LiuWeijie 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.

He is currently an Assistant Professor with the Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China. From 2019 to 2021, he was a Research Associate with the University of New South Wales.

Dr. Yuan currently serves as an Associate Editor for IEEEE Transactions on Green Communications and Networking, an Associate Editor for IEEE Communications Letters, an Associate Editor for China Communications and 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 three special issues in IEEE Communications Magazine, IEEE Transactions on Green Communications and Networking, 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. 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.


Ya-Feng LiuZhiqiang 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 Erlangen-Nuremberg (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.

Dr. Wei is the founding co-chair (publications) of the IEEE ComSoc special interest group on OTFS (OTFS-SIG) and has served a co-chair of many IEEE workshops. 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.


Christos MasourosShuangyang 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 works currently as a research associate at the University of Western Australia (UWA). His research interests include signal processing, channel coding, and their applications to communication systems, with a specific focus on waveform designs.

Dr. Li 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 Communication Letters 2022. He is a recipient of the Marie Skłodowska-Curie Actions (MSCA) fellowship 2022. He is also a founding member and currently the secretary of the special interest group (SIG) on OTFS.