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OTFS-enabled Satellite Communications (Week 2)
July 26, 2022 @ 12:30 pm - 3:15 pm
Organizers: Weijie Yuan, Southern University of Science and Technology Gunes Karabulut Kurt, Polytechnique Montréal Lin Bai, Beihang University Co-organized by Orthogonal Time Frequency Space (OTFS) SIG, Satellite Mega-Constellations SIG, Space Air Ground Integrated (SAGI) Communications SIG in IEEE ComSoc, IEEE YP Montreal, IEEE YP Ottawa, IEEE SB INRS. —————————————————– 8:30 am – 8:35 am Welcome Speech by Prof. Gunes Karabulut Kurt —————————————————– 8:35 am – 9:35 am First Talk by Prof. Yi Hong Title: OTFS and delay-Doppler Communications Abstract: Orthogonal time frequency space (OTFS) modulation has been recently proposed by Hadani et al. at WCNC’17, San Francisco. It was shown to offer significant advantages over OFDM in doubly dispersive channels for high mobility wireless communications. The key idea of OTFS is to model mobile wireless channels in the delay-Doppler domain, where a sparse nature of the geometry of the wireless channel is captured. This talk will introduce the general notion of OTFS/delay-Doppler communications, starting from the fundamentals of high mobility wireless channels, followed by the transceiver architecture used for detection and channel estimation and finally the potential application to LEO Satcom. —————————————————– 9:35 am – 10:35 am Second Talk by Prof. Zan Li and Prof. Jia Shi Topic: OTFS enabled Reliable LEO Satellite Communications: A Killer for Severe Doppler Effect Abstract: To achieve seamless global coverage, low earth orbit satellite (LEO-Sat) communications are attracting widespread attentions as a complement to terrestrial networks, thanks to the advantages of low cost and flexible deployment. Owing to the inherent high-speed mobile nature of LEO-Sat, it inevitably leads to severe Doppler effects, which greatly affect the reliability of the LEO-Sat links. On the other hand, existing methods for coping with the Doppler effect in LEO-sat scenarios generally suffer from high computational complexity and heavy hardware costs. Under this background, this talk focuses on orthogonal time frequency space (OTFS) modulation to enable reliable LEO-sat communications, which overcomes the Doppler effect by averaging the channel dynamics with modulation information in the delay-Doppler (DD) domain. In particular, this talk will discuss the motivations by presenting the high suitability of OTFS for LEO-sat scenarios, taking into account the Doppler effect characteristics of LEO-Sat communications. Then, this talk will address the feasibility of OTFS applications for LEO-Sat communications, and will present recent related works from our group. Finally, a range of promising research opportunities and potential challenges will be provided. —————————————————– Speaker(s): Yi Hong , Zan Li Agenda: 8:30 am – 8:35 am Welcome Speech by Prof. Gunes Karabulut Kurt 8:35 am – 9:35 am First Talk by Prof. Yi Hong 9:35 am – 10:35 am Second Talk by Prof. Zan Li and Prof. Jia Shi Virtual: https://events.vtools.ieee.org/m/319533