ZTE Communications ›› 2021, Vol. 19 ›› Issue (4): 71-78.doi: 10.12142/ZTECOM.202104008

• Special Topic • Previous Articles     Next Articles

Orthogonal Time Frequency Space Modulation in Multiple-Antenna Systems

WANG Dong1, WANG Fanggang1(), LI Xiran1, YUAN Pu2, JIANG Dajie2   

  1. 1.State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China
    2.Vivo Mobile Communication Co. , Ltd. , Beijing 100016, China
  • Received:2021-10-13 Online:2021-12-25 Published:2022-01-04
  • About author:WANG Dong received the B.Eng. degree from the School of Electronic and Information Engineering, Hebei University, China in 2016. He is currently pursuing the Ph.D. degree with the State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, China. His current research interests include multiway relaying communications and MIMO communications.|WANG Fanggang (wangfg@bjtu.edu.cn) received the B.Eng. and Ph.D. degrees from the School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, China in 2005 and 2010, respectively. He was a Post-Doctoral Fellow with the Institute of Network Coding, The Chinese University of Hong Kong, China from 2010 to 2012. He was a visiting scholar with the Massachusetts Institute of Technology, USA from 2015 to 2016 and the Singapore University of Technology and Design, Singapore in 2014. He is currently a professor with the State Key Laboratory of Rail Traffic Control and Safety, School of Electronic and Information Engineering, Beijing Jiaotong University, China. His research interests are in wireless communications, signal processing, and information theory. He served as an editor for the IEEE Communications Letters and a technical program committee member for several conferences.|LI Xiran received the B.Eng degree from the school of Information and Communication Engineering, Beijing Jiaotong University, China in 2021. She is currently pursuing the M.A. degree with the State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University. Her current research interests include MIMO communications and orthogonal time frequency space.|YUAN Pu received the B.Eng. degree from Tianjin University, China in 2007 and the M.S. and Ph.D. degrees from Nanyang Technological University, Singapore in 2010 and 2015, respectively. He is currently with vivo Mobile Communication Co., Ltd., China. From 2016 to 2019, he was a research engineer with the 2012 Laboratories, Huawei Technologies Company, Ltd., China. His research interests include signal processing in communication and information theory.|JIANG Dajie received the B.S. degree in communication engineering and M.S. degree in digital signal processing from Beijing University of Posts and Telecommunications, China in 2005 and 2008, respectively. From 2008 to 2017, he was a research engineer for 4G and 5G wireless research & standardization with China Mobile Research Institute. He is currently with vivo Mobile Communication Co., Ltd., China. His research interests include potential technologies for 6G including RIS and joint communication and sensing.
  • Supported by:
    the Fundamental Research Funds for the Central Universities(2020JBM081);the National Key R&D Program of China(2020YFB1806903);the National Natural Science Foundation(U1834210)

Abstract:

The application of the orthogonal time frequency space (OTFS) modulation in multiple-antenna systems is investigated. The diversity and/or the multiplexing gain can be achieved by deploying various multiple-antenna techniques, and thus the reliability and/or the spectral efficiency are improved correspondingly. We provide two classes of OTFS-based multiple-antenna approaches for both the open-loop and the closed-loop systems. Specifically, in the open-loop system, a transmitting diversity approach, which resembles the space-time coding technique, is proposed by allocating the information symbols appropriately in the delay-Doppler domain. In the closed-loop system, we adopt the Tomlinson-Harashima precoding in our derived delay-Doppler equivalent transmission model. Numerical evaluations demonstrate the advantages of applying the multiple-antenna techniques to the OTFS. At last, several challenges and opportunities are presented.

Key words: OTFS, space-time coding, Tomlinson-Harashima precoding