NOMA: Emerging Radio Access Technique for Next Generation Wireless Networks

EasyChair Preprint 3617

Abstract

The next generation of wireless networks demands for the massive and heterogeneous connectivity, larger bandwidth, ultra-low latency, and ubiquitous connectivity to facilitate higher data rate in new technologies like self-driven vehicles, virtual reality and Internet of Things. With prominence towards 5G and beyond technologies, new research directions are to be explored to achieve the latency to be less than one millisecond and data rate up to 1 Gbps. A crucial challenge for 5G networks is to implement effective radio access technique which can improve the spectral efficiency to cope with the increasing network densification. In order to meet these challenges, various technologies have been proposed and examined such as massive multiple-input multiple-output (mMIMO), M2M communication, millimeter-wave (mmWave) communications, beamforming and non-orthogonal multiple access (NOMA). One of the key solution to increase the spectral efficiency is NOMA. NOMA has great potential to serve multiple users simultaneously at same frequency/code resource and going to outperform the usual orthogonal Multiple Access (OMA) technique in future cellular networks. As per the resource allocation scheme in NOMA based system, it has to deal with the inter user interference. In this paper we have focused on Power domain NOMA and to alleviate interference among the users scheme of Successive interference cancellation (SIC) is implemented and simulated both for uplink and downlink channels. This article shows the complete mathematical model for unordered and ordered power domain NOMA and the system level simulation results shown to compare the performance on the basis of outage probability with different power allocation schemes. It is identified that the capacity of the system increases with the application of optimum power allocation. NOMA is proved to improve the spectral efficiency and transmission latency.

Keyphrases: Massive MIMO, Non-orthogonal multiple access (NOMA), successive interference cancellation (SIC)

@booklet{EasyChair:3617,
  author    = {Smita Prajapati and Ravi Sindal and Ankit Saxena},
  title     = {NOMA: Emerging Radio Access Technique for Next Generation Wireless Networks},
  howpublished = {EasyChair Preprint 3617},
  year      = {EasyChair, 2020}}