# NOMA: Principles and Recent Results

## TL;DR

This paper reviews the fundamental principles of NOMA, including SIC and superposition coding, and discusses recent theoretical and practical results on power allocation, beamforming, and transmission strategies in single-cell systems.

## Contribution

It provides an overview of NOMA principles based on information theory and presents recent advances in power allocation and transmission techniques for single-cell NOMA systems.

## Key findings

- Analysis of power allocation strategies for downlink NOMA
- Insights into beamforming techniques for NOMA
- Evaluation of coordinated and uncoordinated uplink transmissions

## Abstract

Although non-orthogonal multiple access (NOMA) is recently considered for cellular systems, its key ideas such as successive interference cancellation (SIC) and superposition coding have been well studied in information theory. In this paper, we overview principles of NOMA based on information theory and present some recent results. Under a single-cell environment, we mainly focus on fundamental issues, e.g., power allocation and beamforming for downlink NOMA and coordinated and uncoordinated transmissions for uplink NOMA.