Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA

Li S, Wei Z, Yuan W, Yuan J, Bai B, Ng DWK, Hanzo L (2022)

Publication Type: Journal article

Publication year: 2022

Journal

IEEE Journal on Selected Areas in Communications Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 40

Pages Range: 1128-1145

Journal Issue: 4

DOI: 10.1109/JSAC.2022.3143245

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 + beta) times higher than that of the conventional synchronous NOMA transmission in the high signal-to-noise ratio (SNR) regime, with beta 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.

Authors with CRIS profile

Zhiqiang Wei Professur für Informationsübertragung

Involved external institutions

Southern University of Science and Technology CN China (CN) University of Southampton GB United Kingdom (GB) University of New South Wales (UNSW) AU Australia (AU) Xidian University CN China (CN)

How to cite

APA:

Li, S., Wei, Z., Yuan, W., Yuan, J., Bai, B., Ng, D.W.K., & Hanzo, L. (2022). Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA. IEEE Journal on Selected Areas in Communications, 40(4), 1128-1145. https://doi.org/10.1109/JSAC.2022.3143245

MLA:

Li, Shuangyang, et al. "Faster-Than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA." IEEE Journal on Selected Areas in Communications 40.4 (2022): 1128-1145.

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