TUTCRIS - Tampereen teknillinen yliopisto


Outage probability of multi-carrier NOMA systems under joint I/Q imbalance



OtsikkoProceedings - 2018 International Conference on Advanced Communication Technologies and Networking, CommNet 2018
ISBN (elektroninen)9781538646090
DOI - pysyväislinkit
TilaJulkaistu - 16 toukokuuta 2018
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Conference on Advanced Communication Technologies and Networking -
Kesto: 1 tammikuuta 1900 → …


ConferenceInternational Conference on Advanced Communication Technologies and Networking
Ajanjakso1/01/00 → …


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.