TY - JOUR
T1 - OTFS-NOMA
T2 - An Efficient Approach for Exploiting Heterogenous User Mobility Profiles
AU - Ding, Zhiguo
AU - Schober, Robert
AU - Fan, Pingzhi
AU - Vincent Poor, H.
N1 - Funding Information:
The work of Z. Ding was supported by the UK Engineering and Physical Sciences Research Council under grant number EP/P009719/2 and by H2020-MSCA-RISE-2015 under grant number 690750. The work of P. Fan was supported by the National Natural Science Foundation of China under grant No.61731017 and No.61661146003, and the 111 Project (No.111-2-14). The work of H. V. Poor was supported by the U.S. National Science Foundation under Grants CCF-0939370 and CCF-1513915.
Funding Information:
Manuscript received April 4, 2019; revised June 5, 2019; accepted July 14, 2019. Date of publication August 2, 2019; date of current version November 19, 2019. The work of Z. Ding was supported by the UK Engineering and Physical Sciences Research Council under grant number EP/P009719/2 and by H2020-MSCA-RISE-2015 under grant number 690750. The work of P. Fan was supported by the National Natural Science Foundation of China under grant No.61731017 and No.61661146003, and the 111 Project (No.111-2-14). The work of H. V. Poor was supported by the U.S. National Science Foundation under Grants CCF-0939370 and CCF-1513915. The associate editor coordinating the review of this article and approving it for publication was V. Raghavan. (Corresponding author: Zhiguo Ding.) Z. Ding is with the School of Electrical and Electronic Engineering,
Publisher Copyright:
© 1972-2012 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - This paper considers a challenging communication scenario, in which users have heterogenous mobility profiles, e.g., some users are moving at high speeds and some users are static. A new non-orthogonal multiple-access (NOMA) transmission protocol that incorporates orthogonal time frequency space (OTFS) modulation is proposed. Thereby, users with different mobility profiles are grouped together for the implementation of NOMA. The proposed OTFS-NOMA protocol is shown to be applicable to both uplink and downlink transmission, where sophisticated transmit and receive strategies are developed to remove inter-symbol interference and harvest both multi-path and multi-user diversity. Analytical results demonstrate that both the high-mobility and the low-mobility users benefit from the application of OTFS-NOMA. In particular, the use of NOMA allows the spreading of the high-mobility users' signals over a large amount of time-frequency resources, which enhances the OTFS resolution and improves the detection reliability. In addition, OTFS-NOMA ensures that low-mobility users have access to bandwidth resources which in conventional OTFS-orthogonal multiple access (OTFS-OMA) would be solely occupied by the high-mobility users. Thus, OTFS-NOMA improves the spectral efficiency and reduces latency.
AB - This paper considers a challenging communication scenario, in which users have heterogenous mobility profiles, e.g., some users are moving at high speeds and some users are static. A new non-orthogonal multiple-access (NOMA) transmission protocol that incorporates orthogonal time frequency space (OTFS) modulation is proposed. Thereby, users with different mobility profiles are grouped together for the implementation of NOMA. The proposed OTFS-NOMA protocol is shown to be applicable to both uplink and downlink transmission, where sophisticated transmit and receive strategies are developed to remove inter-symbol interference and harvest both multi-path and multi-user diversity. Analytical results demonstrate that both the high-mobility and the low-mobility users benefit from the application of OTFS-NOMA. In particular, the use of NOMA allows the spreading of the high-mobility users' signals over a large amount of time-frequency resources, which enhances the OTFS resolution and improves the detection reliability. In addition, OTFS-NOMA ensures that low-mobility users have access to bandwidth resources which in conventional OTFS-orthogonal multiple access (OTFS-OMA) would be solely occupied by the high-mobility users. Thus, OTFS-NOMA improves the spectral efficiency and reduces latency.
KW - Orthogonal time frequency space (OTFS)
KW - dual plane multiple access
KW - non-orthogonal multiple access (NOMA)
KW - uplink and downlink transmission
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U2 - 10.1109/TCOMM.2019.2932934
DO - 10.1109/TCOMM.2019.2932934
M3 - Article
AN - SCOPUS:85075625594
SN - 0090-6778
VL - 67
SP - 7950
EP - 7965
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 11
M1 - 8786203
ER -