Outage probability of multi-carrier NOMA systems under joint I/Q imbalance
- 1 April 2018
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-7
Abstract
Non-orthogonal multiple access (NOMA) has been recently proposed as a viable technology that can potentially improve the spectral efficiency of fifth generation (5G) wireless networks and beyond. However, in practical communication scenarios, transceiver architectures inevitably suffer from radio-frequency (RF) front-end related impairments that can lead to degradation of the overall system performance, with in-phase/quadrature-phase imbalance (IQI) constituting a major impairment in direct-conversion transceivers. In the present work, we quantify the effects of joint transmitter/receiver IQI on the performance of NOMA based multi-carrier (MC) systems under multipath fading conditions. Furthermore, we derive the asymptotic diversity order of the considered MC NOMA set up. Capitalizing on these results, we demonstrate that the effects of IQI differ considerably among NOMA users and depend on the underlying system parameters. For example, it is shown that the first sorted user appears more robust to IQI, which indicates that higher order users are more sensitive to the considered non-negligible impairment.Keywords
This publication has 10 references indexed in Scilit:
- Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and ChallengesIEEE Communications Surveys & Tutorials, 2016
- Non-orthogonal transmission technology in LTE evolutionIEEE Communications Magazine, 2016
- On the Performance of Non-orthogonal Multiple Access Systems With Partial Channel InformationIEEE Transactions on Communications, 2015
- Non-orthogonal multiple access for 5G: solutions, challenges, opportunities, and future research trendsIEEE Communications Magazine, 2015
- On the Performance of Non-Orthogonal Multiple Access in 5G Systems with Randomly Deployed UsersIEEE Signal Processing Letters, 2014
- Non-Orthogonal Multiple Access (NOMA) for Cellular Future Radio Access2013
- RF Imperfections in High-rate Wireless Systems2008
- Diversity analysis of space-time coding in cascaded Rayleigh fading channelsIEEE Communications Letters, 2006
- Analytical calculation of outage probability for a general cellular mobile radio system2003
- Classical and modern receiver architecturesIEEE Communications Magazine, 2000