Abstract
Non-orthogonal multiple access (NOMA) is one of the key technologies being evaluated for the fifth generation (5G) wireless communications. In this paper, a novel NOMA mechanism combining both the code-domain and power-domain techniques is proposed to potentially support a higher number of users. In particular, considering the code-domain NOMA method of sparse code multiple access (SCMA) as the baseline, new low data rate (LDR) users are added on top of it using power-domain NOMA. The optimization problem involving resource and power allocation in such a system is solved such that the overall achievable sum-rate is maximized. Simulation results indicate that the proposed mechanism not only supports higher number of users, but also demonstrates a higher achievable sum-rate than the original SCMA-based system.
| Original language | English |
|---|---|
| Title of host publication | 2018 IEEE Global Communications Conference (GLOBECOM) |
| Publisher | IEEE |
| ISBN (Electronic) | 9781538647271 |
| DOIs | |
| Publication status | Published - 21 Feb 2019 |
| Event | 2018 IEEE Global Communications Conference - Abu Dhabi, United Arab Emirates Duration: 9 Dec 2018 → 13 Dec 2018 |
Conference
| Conference | 2018 IEEE Global Communications Conference |
|---|---|
| Abbreviated title | GLOBECOM 2018 |
| Country/Territory | United Arab Emirates |
| City | Abu Dhabi |
| Period | 9/12/18 → 13/12/18 |
Keywords
- integer programming
- NOMA
- resource allocation
- SCMA
- successive convex approximation
ASJC Scopus subject areas
- Information Systems and Management
- Renewable Energy, Sustainability and the Environment
- Safety, Risk, Reliability and Quality
- Signal Processing
- Modelling and Simulation
- Instrumentation
- Computer Networks and Communications
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