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NOMA for 5G and beyond: literature review and novel trends
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Journal Article
NOMA for 5G and beyond: literature review and novel trends
2023
Overview
The non-orthogonal multiple access (NOMA) system is considered an important technology that enables the fifth-generation (5G) wireless systems and beyond to satisfy different requirements such as high efficiency, massive networks, sophisticated optimization, and steady quality. Also, the NOMA scheme provides advancements and attractive characteristics such as low latency, ultra-dense service, great fairness, innovative waveform architecture, efficient bandwidth utilization, and massive device connectivity compared to the earliest multiple access schemes. Therefore, the NOMA system necessitates an efficient resource allocation technique such as user pairing (UP) and power allocation (PA) schemes to achieve optimal performance. So, in this paper, we discuss the significance of resource allocation in NOMA in 5G networks and beyond in-depth. As a result, firstly, we review the classification of multiple access schemes, the various types of NOMA techniques, and the characteristics of NOMA. Then, the paper analyzes the issue of resource allocation by classifying the different resource allocation schemes in 5G. Further, a summary of the solutions to the current resource allocation issues are reviewed. Finally, we suggest future research challenges on which to focus.
Publisher
Springer Nature B.V
