Reconfigurable Intelligent Surface Aided NOMA Networks
By Tianwei Hou, Yuanwei Liu, Zhengyu Song, Xin Sun, Yue Chen, Lajos Hanzo. IEEE Journal on Selected Areas in Communications, 2019
338 citations recorded by the source corpus.
Reconfigurable intelligent surfaces (RISs) constitute a promising performance enhancement for next-generation (NG) wireless networks in terms of enhancing both their spectral efficiency (SE) and energy efficiency (EE). We conceive a system for serving paired power-domain non-orthogonal multiple access (NOMA) users by designing the passive beamforming weights at the RISs. In an effort to evaluate the network performance, we first derive the best-case and worst-case of new channel statistics for characterizing the effective channel gains. Then, we derive the best-case and worst-case of our closed-form expressions derived both for the outage probability and for the ergodic rate of the prioritized user. For gleaning further insights, we investigate both the diversity orders of the outage probability and the high-signal-to-noise (SNR) slopes of the ergodic rate. We also derive both the SE and EE of the proposed network. Our analytical results demonstrate that the base station (BS)-user links have almost no impact on the diversity orders attained when the number of RISs is high enough. Numerical results are provided for confirming that: i) the high-SNR slope of the RIS-aided network is one; ii) the proposed RIS-aided NOMA network has superior network performance compared to its orthogonal counterpart.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/209bb7bc8dbe3d4fe3132619fe8617c27b5c2dec
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Electrical and Electronic Engineering
- Yuanwei Liu
- Merouane Debbah
- Xidong Mu
- Chau Yuen
- M. Di Renzo
- Naofal Al-Dhahir
- Mohamed-Slim Alouini
- H. Vincent Poor
Citations in the corpus
- Channel Estimation for RIS-Empowered Multi-User MISO Wireless Communications (2020, background): “Orthogonal and non-orthogonal multiple access in RIS-assisted communications was studied in [15] as a costeffective solution for boosting spectrum/energy efficiency.”
- Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How It Works, State of Research, and The Road Ahead (2020, background): “In [222], the authors propose a priority-oriented design”
- Reconfigurable Intelligent Surfaces: Principles and Opportunities (2020, methodology): “[59], where the passive beamforming is designed for the user with the best channel gain, and all other users rely on RIS-aided beamforming.”
- Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions (2022, background): “binations by introducing HMIMOS to various areas, including physical layer security [284]–[286], index modulation [287]– [289], non-orthogonal multiple access [290]–[292], cognitive radio [293]–[295], ambient backscattering communications [74], [296], [297], full duplex wireless communications [298]”
- Grant-Free Non-Orthogonal Multiple Access for IoT: A Survey (2019, background): “The works in [240]–[242] focus on RIS aided PD-NOMA for DL transmissions; [240] considers a single-”
- Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How it Works, State of Research, and Road Ahead (2020, background): “In [221], the authors propose a priority-oriented design for enhancing the spectral efficiency of an RIS-aided NOMA network.”