OTFS Related Discussions

• If you have any questions regarding OTFS, please send an email to shuangyang.li@unsw.edu.au. The SIG secretary will collect interesting questions and post them here for discussions.

• Q1: What is OTFS and why we need it?
  

• A1 (By Shuangyang) :

With the rapid development of technologies, the existing wireless communication networks based on the conventional orthogonal frequency-division multiplexing (OFDM) modulation have encountered unprecedented challenges in meeting the requirements of various emerging applications. In particular, the beyond 5G (B5G) wireless networks are expected to provide reliable communications for a wide range of terminals with a high mobility, including autonomous cars, high speed trains (HSTs), unmanned aerial vehicles (UAVs), and low-earth-orbit (LEO) satellites. In those scenarios, the conventional OFDM modulation may break down due to the severe Doppler spread introduced by the high-mobility. To facilitate the design of B5G wireless networks, the recently proposed orthogonal time frequency space (OTFS) modulation has attracted substantial attention.

For a more detailed and insightful introduction, please refer to Hadani's excellent introduction video of OTFS
www.youtube.com/watch?v=t8qigxecpDI&t=1934s&ab_channel=TheQualcommInstitute .