A Survey of Downlink Non-orthogonal Multiple Access for 5G Wireless Communication Networks

TL;DR

This survey reviews the principles, models, and research challenges of non-orthogonal multiple access (NOMA) for 5G wireless networks, covering basic models, performance analysis, and advanced techniques.

Contribution

It provides a comprehensive overview of NOMA models, performance analysis, resource allocation, and MIMO techniques, highlighting key features and future research challenges.

Findings

NOMA enables multiple users to share the same resources simultaneously.

Performance analysis and resource allocation strategies are crucial for NOMA efficiency.

NOMA presents promising potential for 5G and beyond wireless communication systems.

Abstract

Non-orthogonal multiple access (NOMA) has been recognized as a promising multiple access technique for the next generation cellular communication networks. In this paper, we first discuss a simple NOMA model with two users served by a single-carrier simultaneously to illustrate its basic principles. Then, a more general model with multicarrier serving an arbitrary number of users on each subcarrier is also discussed. An overview of existing works on performance analysis, resource allocation, and multiple-input multiple-output NOMA are summarized and discussed. Furthermore, we discuss the key features of NOMA and its potential research challenges.