[Paper Review] NOMA in 5G Systems: Exciting Possibilities for Enhancing Spectral Efficiency

S. M. Riazul Islam, Ming Zeng+1 more|arXiv (Cornell University)|Jun 25, 2017

Advanced Wireless Communication Technologies86 citations

TL;DR

This article provides an overview of power-domain non-orthogonal multiple access (NOMA) for 5G systems, covering basic concepts, benefits, current solutions, standardization activities, and discussed limitations and research challenges.

ABSTRACT

This article provides an overview of power-domain non-orthogonal multiple access for 5G systems. The basic concepts and benefits are briefly presented, along with current solutions and standardization activities. In addition, limitations and research challenges are discussed.

Motivation & Objective

• Motivate exploration of NOMA as a technique to enhance spectral efficiency in 5G systems.
• Present the basic concepts and potential benefits of power-domain NOMA.
• Summarize current solutions and standardization activities related to NOMA in 5G.
• Discuss limitations and identify key research challenges to guide future work.

Proposed method

• Provide a concise survey-style overview of NOMA in the context of 5G.
• Describe the basic concepts and benefits of power-domain NOMA.
• Summarize existing solutions and standardization efforts.
• Outline limitations and highlight open research challenges in the area.

Experimental results

Research questions

• RQ1 What are the basic concepts and benefits of power-domain NOMA for 5G systems?
• RQ2 What are the current solutions and standardization activities related to NOMA in 5G?
• RQ3 What limitations and research challenges are associated with implementing NOMA in 5G?
• RQ4 How do these factors position NOMA within the broader 5G spectral efficiency goals?

Key findings

• NOMA in 5G is presented as a promising approach to enhance spectral efficiency.
• The article summarizes basic concepts and benefits of power-domain NOMA.
• Current solutions and standardization activities for NOMA in 5G are reviewed.
• Limitations and research challenges of NOMA in 5G are discussed to guide future work.