Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA

Shuangyang LI; Zhiqiang WEI; Weijie YUAN; Jinhong YUAN; Baoming BAI; Derrick Wing Kwan NG; Lajos HANZO

doi:10.1109/JSAC.2022.3143245

Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA

Shuangyang LI, Zhiqiang WEI^*, Weijie YUAN, Jinhong YUAN, Baoming BAI, Derrick Wing Kwan NG, Lajos HANZO

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

23 Citations (Scopus)

Abstract

Faster-than-Nyquist (FTN) signaling aided non-orthogonal multiple access (NOMA) is conceived and its achievable rate is quantified in the presence of random link delays of the different users. We reveal that exploiting the link delays may potentially lead to a signal-to-interference-plus-noise ratio (SINR) gain, while transmitting the data symbols at FTN rates has the potential of increasing the degree-of-freedom (DoF). We then unveil the fundamental trade-off between the SINR and DoF. In particular, at a sufficiently high symbol rate, the SINR gain vanishes while the DoF gain achieves its maximum, where the achievable rate is almost (1+β) times higher than that of the conventional synchronous NOMA transmission in the high signal-to-noise ratio (SNR) regime, with β being the roll-off factor of the signaling pulse. Our simulation results verify our analysis and demonstrate considerable rate improvements over the conventional power-domain NOMA scheme.

Original language	English
Pages (from-to)	1128-1145
Number of pages	18
Journal	IEEE Journal on Selected Areas in Communications
Volume	40
Issue number	4
Early online date	14 Jan 2022
DOIs	https://doi.org/10.1109/JSAC.2022.3143245
Publication status	Published - Apr 2022
Externally published	Yes

Bibliographical note

An earlier version of this paper was presented in part at the IEEE Wireless Communications and Networking Conference 2021 [1] [DOI: 10.1109/WCNC49053.2021.9417538].

Publisher Copyright:
© 1983-2012 IEEE.

Funding

This work was supported in part by the National Natural Science Foundation of China under Grant 62171356. The work of Derrick Wing Kwan Ng was supported in part by the UNSW Digital Grid Futures Institute, University of New South Wales (UNSW), Sydney, under a cross-disciplinary fund scheme; and in part by the Australian Research Council s Discovery Project under Grant DP210102169. The work of Lajos Hanzo was supported in part by the Engineering and Physical Sciences Research Council under Project EP/P034284/1 and Project EP/P003990/1 (COALESCE) and in part by the European Research Council s Advanced Fellow Grant QuantCom under Grant 789028.

Keywords

achievable rate
asynchronous transmission
faster-than-Nyquist signaling
NOMA

Access to Document

10.1109/JSAC.2022.3143245

Cite this

@article{94bc5e7ed56746fe9cb55771ce84388b,

title = "Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA",

abstract = "Faster-than-Nyquist (FTN) signaling aided non-orthogonal multiple access (NOMA) is conceived and its achievable rate is quantified in the presence of random link delays of the different users. We reveal that exploiting the link delays may potentially lead to a signal-to-interference-plus-noise ratio (SINR) gain, while transmitting the data symbols at FTN rates has the potential of increasing the degree-of-freedom (DoF). We then unveil the fundamental trade-off between the SINR and DoF. In particular, at a sufficiently high symbol rate, the SINR gain vanishes while the DoF gain achieves its maximum, where the achievable rate is almost (1+β) times higher than that of the conventional synchronous NOMA transmission in the high signal-to-noise ratio (SNR) regime, with β being the roll-off factor of the signaling pulse. Our simulation results verify our analysis and demonstrate considerable rate improvements over the conventional power-domain NOMA scheme.",

keywords = "achievable rate, asynchronous transmission, faster-than-Nyquist signaling, NOMA",

author = "Shuangyang LI and Zhiqiang WEI and Weijie YUAN and Jinhong YUAN and Baoming BAI and NG, {Derrick Wing Kwan} and Lajos HANZO",

note = "An earlier version of this paper was presented in part at the IEEE Wireless Communications and Networking Conference 2021 [1] [DOI: 10.1109/WCNC49053.2021.9417538]. Publisher Copyright: {\textcopyright} 1983-2012 IEEE.",

year = "2022",

month = apr,

doi = "10.1109/JSAC.2022.3143245",

language = "English",

volume = "40",

pages = "1128--1145",

journal = "IEEE Journal on Selected Areas in Communications",

issn = "0733-8716",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "4",

}

TY - JOUR

T1 - Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA

AU - LI, Shuangyang

AU - WEI, Zhiqiang

AU - YUAN, Weijie

AU - YUAN, Jinhong

AU - BAI, Baoming

AU - NG, Derrick Wing Kwan

AU - HANZO, Lajos

N1 - An earlier version of this paper was presented in part at the IEEE Wireless Communications and Networking Conference 2021 [1] [DOI: 10.1109/WCNC49053.2021.9417538]. Publisher Copyright: © 1983-2012 IEEE.

PY - 2022/4

Y1 - 2022/4

N2 - Faster-than-Nyquist (FTN) signaling aided non-orthogonal multiple access (NOMA) is conceived and its achievable rate is quantified in the presence of random link delays of the different users. We reveal that exploiting the link delays may potentially lead to a signal-to-interference-plus-noise ratio (SINR) gain, while transmitting the data symbols at FTN rates has the potential of increasing the degree-of-freedom (DoF). We then unveil the fundamental trade-off between the SINR and DoF. In particular, at a sufficiently high symbol rate, the SINR gain vanishes while the DoF gain achieves its maximum, where the achievable rate is almost (1+β) times higher than that of the conventional synchronous NOMA transmission in the high signal-to-noise ratio (SNR) regime, with β being the roll-off factor of the signaling pulse. Our simulation results verify our analysis and demonstrate considerable rate improvements over the conventional power-domain NOMA scheme.

AB - Faster-than-Nyquist (FTN) signaling aided non-orthogonal multiple access (NOMA) is conceived and its achievable rate is quantified in the presence of random link delays of the different users. We reveal that exploiting the link delays may potentially lead to a signal-to-interference-plus-noise ratio (SINR) gain, while transmitting the data symbols at FTN rates has the potential of increasing the degree-of-freedom (DoF). We then unveil the fundamental trade-off between the SINR and DoF. In particular, at a sufficiently high symbol rate, the SINR gain vanishes while the DoF gain achieves its maximum, where the achievable rate is almost (1+β) times higher than that of the conventional synchronous NOMA transmission in the high signal-to-noise ratio (SNR) regime, with β being the roll-off factor of the signaling pulse. Our simulation results verify our analysis and demonstrate considerable rate improvements over the conventional power-domain NOMA scheme.

KW - achievable rate

KW - asynchronous transmission

KW - faster-than-Nyquist signaling

KW - NOMA

UR - http://www.scopus.com/inward/record.url?scp=85123298430&partnerID=8YFLogxK

U2 - 10.1109/JSAC.2022.3143245

DO - 10.1109/JSAC.2022.3143245

M3 - Journal Article (refereed)

AN - SCOPUS:85123298430

SN - 0733-8716

VL - 40

SP - 1128

EP - 1145

JO - IEEE Journal on Selected Areas in Communications

JF - IEEE Journal on Selected Areas in Communications

IS - 4

ER -

Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA

Abstract

Bibliographical note

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this