Adaptation of Code-Domain NOMA to SC-FDE based Overloaded mmWave Hybrid Massive MIMO

2021-01-01
Bayraktar, Murat
Güvensen, Gökhan Muzaffer
IEEEIn this paper, we provide a practical framework to resolve whether code-domain NOMA (CD-NOMA) is beneficial when integrated with massive MIMO systems. In order to realize this integration, first, we develop a novel code-beamspace wideband signal model for uplink CD-NOMA in mmWave hybrid massive MIMO systems employing single-carrier (SC) transmission. Then, we apply a state-of-the-art SC frequency domain equalization (SC-FDE) based iterative receiver where the number of radio frequency (RF) chains is limited. Simulation results verify the effectiveness of the proposed architecture in overloaded scenarios. Furthermore, we show that CD-NOMA can enhance the performance of mmWave hybrid beamforming based massive MIMO systems by effectively decreasing the correlation between closely separated user channels in joint code-beamspace.
IEEE Communications Letters

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Citation Formats
M. Bayraktar and G. M. Güvensen, “Adaptation of Code-Domain NOMA to SC-FDE based Overloaded mmWave Hybrid Massive MIMO,” IEEE Communications Letters, pp. 0–0, 2021, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85121782637&origin=inward.