Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges

By S. M. Riazul Islam, Nurilla Avazov, Octavia A. Dobre, K. Kwak. IEEE Communications Surveys and Tutorials, 2016

2,131 citations recorded by the source corpus.

Non-orthogonal multiple access (NOMA) is one of the promising radio access techniques for performance enhancement in next-generation cellular communications. Compared to orthogonal frequency division multiple access, which is a well-known high-capacity orthogonal multiple access technique, NOMA offers a set of desirable benefits, including greater spectrum efficiency. There are different types of NOMA techniques, including power-domain and code-domain. This paper primarily focuses on power-domain NOMA that utilizes superposition coding at the transmitter and successive interference cancellation at the receiver. Various researchers have demonstrated that NOMA can be used effectively to meet both network-level and user-experienced data rate requirements of fifth-generation (5G) technologies. From that perspective, this paper comprehensively surveys the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NOMA. In addition, this paper discusses how NOMA performs when it is integrated with various proven wireless communications techniques, such as cooperative communications, multiple-input multiple-output, beamforming, space–time coding, and network coding among others. Furthermore, this paper discusses several important issues on NOMA implementation and provides some avenues for future research.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/b641ea7978dc6f08df9f25e52c465b2fba184263

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In Electrical and Electronic Engineering

Citations in the corpus

A Survey on Resource Allocation for 5G Heterogeneous Networks: Current Research, Future Trends, and Challenges (2020, background): “For example, for the power-domain NOMA system, different users are allocated different power levels according to their channel quality, the same time/frequency/code resources can be shared among multiple users [45].”
Resource Allocation for Downlink NOMA Systems: Key Techniques and Open Issues (2017, background): “Non-orthogonal multiple access (NOMA) enables a balanced tradeoff between spectral efﬁciency and user fairness, being recognized as a promising multiple access technique for the ﬁfth generation (5G) networks [1]–[3].”
Satellite Communications in the New Space Era: A Survey and Future Challenges (2020, methodology): “from both industry and academia over the past few years [128].”
A Survey of Rate-Optimal Power Domain NOMA With Enabling Technologies of Future Wireless Networks (2019, background): “referred to as the power-domain NOMA (PD-NOMA) [3] scheme and is the focus of this survey paper.”
Residual Transceiver Hardware Impairments on Cooperative NOMA Networks (2020, neutral): “Without loss of generality, we assumed that the estimated channel gain between S and Dn are sorted as |ĝsd1 |(2) ≤ |ĝsd1 |(2) ≤ · · · ≤ |ĝsdN |(2) [5].”
Nonorthogonal Multiple Access for 5G and Beyond (2017, background): “There are some short magazine papers [16], [23], [43], [44] and surveys [45], [46] in the literature that introduce Table II: Timeline of power-domain NOMA milestones.”
6G Internet of Things: A Comprehensive Survey (2021, background): “Numerical simulation veriﬁes a better resource allocation with lower power consumption and reduced complexity.”
A Survey on Scalable LoRaWAN for Massive IoT: Recent Advances, Potentials, and Challenges (2022, methodology): “Furthermore, NOMA was employed in [140] to enhance the downlink for CSS communication combined with a SIC algorithm in the presence of concurrent CSS signals received simultaneously.”
6G for Vehicle-to-Everything (V2X) Communications: Enabling Technologies, Challenges, and Opportunities (2020, background): “There are two main types of NOMA: power-domain NOMA [69], [70] and code-domain NOMA [22], [71], such as SCMA [21], [72]–[74] and resource spread multiple access [75], in which multiple users are separated by different power levels and different codebooks/sequences, respectively.”
Non-Orthogonal Multiple Access in Multi-Cell Networks: Theory, Performance, and Practical Challenges (2016, background): “NOMA can be realized in the power, code, or other domains [2, 3].”
Simultaneous Wireless Information and Power Transfer (SWIPT): Recent Advances and Future Challenges (2018, background): “different solutions that can be classified into two approaches: power-domain and code-domain [121].”
The Road Towards 6G: A Comprehensive Survey (2021, background): “been recently proposed and is attracting a lot of research interest in context of 5G [133], code-domain NOMA has a longer history in legacy systems (e.”
Joint Beamforming and Power Allocation for Satellite-Terrestrial Integrated Networks With Non-Orthogonal Multiple Access (2019, background): “The fundamental work of NOMA was discussed in [25], [26] and the references therein, introducing the basic concepts of NOMA, potential NOMA solutions, related challenges, and etc.”
Capacity Comparison Between MIMO-NOMA and MIMO-OMA With Multiple Users in a Cluster (2017, background): “Most of the existing works in MIMO-NOMA focus on the case of two users in each cluster [3], [11]–[16], which leads to a less-studied alternative in the case of multiple users [12], [17].”
A Survey of Multi-Access Edge Computing in 5G and Beyond: Fundamentals, Technology Integration, and State-of-the-Art (2019, neutral): “understanding of the benefits and opportunities that NOMA offers as well as its challenges and application scenarios, the interested readers are recommended to refer to NOMA research works, such as, [57], [59], [60], [62]–[64].”
Modulation and Multiple Access for 5G Networks (2017, background): “ot be achieved simultaneously in NOMA networks. Therefore we expect to see more work on SE and EE tradeoffs in NOMA in the future. A more comprehensive review on the power-domain NOMA can be found in [72]. B. Code-Domain NOMA Code-domain NOMA can support multiple transmissions within the same time-f”
A Survey on Nongeostationary Satellite Systems: The Communication Perspective (2021, background): “co-channel interference, accommodate more user terminals, and improve system spectral efficiency [158].”
Spectrum and Energy-Efficient Beamspace MIMO-NOMA for Millimeter-Wave Communications Using Lens Antenna Array (2017, methodology): “In addition, the proposed beamspace MIMO-NOMA also outperforms MIMO-OMA, since NOMA can achieve higher spectrum efﬁciency than that of OMA [17], [19], [21].”
Study and Investigation on 5G Technology: A Systematic Review (2021, methodology): “Al-Imari et al. [22] Good Good Average Islam et al. [53] Good Average Average Kiani and Nsari [9] Average Good Good Timotheou and Krikidis [10] Good Good Average Wei et al. [17] Good Average Good”