Performance analysis of non‐orthogonal multiple access in downlink cooperative network
Open Access
- 1 December 2015
- journal article
- research article
- Published by Institution of Engineering and Technology (IET) in IET Communications
- Vol. 9 (18), 2267-2273
- https://doi.org/10.1049/iet-com.2015.0203
Abstract
Non-orthogonal multiple access (NOMA), an emerging technology to improve system capacity and spectrum efficiency, has attracted significant attention. In this study, the authors propose a NOMA-based downlink cooperative cellular system, where the base station communicates with two paired mobile users simultaneously through the help of a half-duplex amplify-and-forward relay. The outage performance of the system is investigated and closed-form expressions for their respective exact and asymptotic outage scheme are derived. Furthermore, they study the ergodic sum rate of the two paired users and the upper bound of the ergodic sum rate is obtained. By comparing the NOMA with conventional multiple access (MA) via numerical simulations, they have shown that NOMA can obtain the same diversity order with conventional MA, and achieve nearly the same sum rate with conventional MA. Furthermore, NOMA can offer better spectral efficiency and user fairness since more users are served at the same time, frequency, and spreading code.Keywords
Funding Information
- National Natural Science Foundation of China (61372067)
This publication has 10 references indexed in Scilit:
- Cooperative Non-Orthogonal Multiple Access in 5G SystemsIEEE Communications Letters, 2015
- Energy-Efficient Distributed Beamforming in UWB Based Implant Body Area NetworksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2015
- On the Performance of Non-Orthogonal Multiple Access in 5G Systems with Randomly Deployed UsersIEEE Signal Processing Letters, 2014
- 5G Network Capacity: Key Elements and TechnologiesIEEE Vehicular Technology Magazine, 2014
- System-level performance evaluation of downlink non-orthogonal multiple access (NOMA)Published by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- Non-Orthogonal Multiple Access (NOMA) for Cellular Future Radio AccessPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- Enhancing user fairness in non-orthogonal access with successive interference cancellation for cellular downlinkPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2012
- Performance of Analog Network Coding with Asymmetric Traffic RequirementsIEEE Communications Letters, 2011
- Order StatisticsWiley Series in Probability and Statistics, 2003
- Elements of Information TheoryPublished by Wiley ,2001