ZTE Communications ›› 2021, Vol. 19 ›› Issue (4): 54-62.doi: 10.12142/ZTECOM.202104006

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Coded Orthogonal Time Frequency Space Modulation

LIU Mengmeng1, LI Shuangyang2, ZHANG Chunqiong1, WANG Boyu1, BAI Baoming1()   

  1. 1.State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an 710071, China
    2.School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney 2032, Australia
  • Received:2021-11-01 Online:2021-12-25 Published:2022-01-04
  • About author:LIU Mengmeng received her B.S. degree in communication engineering from Xidian University, China in 2017. She is currently pursuing her Ph.D. degree with Xidian University. Her research interests include signal processing and channel coding for wireless communications.|LI Shuangyang received his B.S. and M.S. degrees from Xidian University, China in 2013 and 2016, respectively. He is currently pursuing his Ph.D. degree in Xidian University and University of New South Wales, Australia. His research interests include signal processing, channel coding and their applications to communication systems.|ZHANG Chunqiong received her B.S. degree in communication engineering from Xidian University, China in 2019. She is currently pursuing the M.S. degree with Xidian University. Her research interests include signal processing and channel coding for wireless communications.|WANG Boyu received his B.S. degree in mathematics from China University of Mining and Technology-Beijing, China in 2017, and M.S. degree in mathematics from University of Sheffield, UK in 2019. He is currently studying at Xidian University, China. His research interests include coding theory, and algorithm design and analysis via convex optimization in LDPC decoding.|BAI Baoming (bmbai@mail.xidian.edu.cn) received his B.S. degree from the Northwest Telecommunications Engineering Institute, China in 1987, and the M.S. and Ph.D. degrees in communication engineering from Xidian University, China in 1990 and 2000, respectively. From 2000 to 2003, he was a senior research assistant in the Department of Electronic Engineering, City University of Hong Kong, China. Since April 2003, he has been with the State Key Laboratory of Integrated Services Networks (ISN), School of Telecommunication Engineering, Xidian University, where he is currently a professor. In 2005, he was with the University of California, USA as a visiting scholar. His research interests include information theory and channel coding, wireless communication, and quantum communication.
  • Supported by:
    the National Natural Science Foundation of China(61771364);the National Key R&D Program of China(2020YEB1807104)

Abstract:

Orthogonal time frequency space (OTFS) modulation is a novel two-dimensional modulation scheme for high-Doppler fading scenarios, which is implemented in the delay-Doppler (DD) domain. In time and frequency selective channels, OTFS modulation is more robust than the popular orthogonal frequency division multiplexing (OFDM) modulation technique. To further improve transmission reliability, some channel coding schemes are used in the OTFS modulation system. In this paper, the coded OTFS modulation system is considered and introduced in detail. Furthermore, the performance of the uncoded/coded OTFS system and OFDM system is analyzed with different relative speeds, modulation schemes, and iterations. Simulation results show that the OTFS system has the potential of full diversity gain and better robustness under high mobility scenarios.

Key words: OTFS modulation, OFDM, channel coding, fading channel