A Simple Design of IRS-NOMA Transmission

By Zhiguo Ding, Vincent H. Poor. IEEE Communications Letters, 2019

440 citations recorded by the source corpus.

This letter proposes a simple design of intelligent reflecting surface (IRS) assisted non-orthogonal multiple access (NOMA) downlink transmission. In particular, conventional spatial division multiple access (SDMA) is used first at the base station to generate orthogonal beams by using the spatial directions of the near users’ channels. Then, IRS-assisted NOMA is used to ensure that additional cell-edge users can also be served on these beams by aligning the cell-edge users’ effective channel vectors with the predetermined spatial directions. Both analytical and simulation results are provided to demonstrate the performance of the proposed IRS-NOMA scheme and also study the impact of hardware impairments on IRS-NOMA.

Subfields: Electrical and Electronic Engineering, Ocean Engineering

View Paper: https://www.semanticscholar.org/paper/8853dc7ebad4f6949b25ff41bc351f9ba467c8e2

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Citations in the corpus

Reconfigurable Intelligent Surfaces for Wireless Communications: Overview of Hardware Designs, Channel Models, and Estimation Techniques (2022, background): “In [122], a basic channel model was presented, where”
Evolution of NOMA Toward Next Generation Multiple Access (NGMA) for 6G (2021, methodology): “To overcome this issue, in [117], multiple distributed RISs were deployed to establish a reflection link between the BS and cell-edge users, each of which shared the same beamformer as one cell-center user to facilitate NOMA.”
Reconfigurable Intelligent Surfaces: Principles and Opportunities (2020, methodology): “[57] proposed a novel design of RIS assisted NOMA networks.”
Reconfigurable Intelligent Surface Aided NOMA Networks (2019, methodology): “The RISs can be deployed for enhancing the power level of the cell-edge users, where the cell-center users treat the reflected signal as interference [28].”
Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How it Works, State of Research, and Road Ahead (2020, background): “In [215], the authors propose an RIS-based NOMA transmission scheme in which the number of users that can be served in each orthogonal spatial direction is larger compared with spatial division multiple access schemes.”
A Survey of Rate-Optimal Power Domain NOMA With Enabling Technologies of Future Wireless Networks (2019, methodology): “2) Intelligent Reflecting Surfaces (IRS): The addition of NOMA to the IRS networks described in Section II-J2 has recently been proposed in [298], where the ability of the IRS to align the user’s channel vectors is shown to be a great enabler for NOMA cluster formation.”
Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How It Works, State of Research, and The Road Ahead (2020, background): “In [216], the authors propose an RIS-based NOMA trans-”
Reconfigurable Intelligent Surfaces for 6G Systems: Principles, Applications, and Research Directions (2021, positive): “To broaden the application of NOMA, RIS can be introduced into the system for beneﬁcially manipulating the wireless channel vectors of all users, so that one user’s channel vector can be aligned with the other one’s [10].”
Capacity Characterization for Intelligent Reflecting Surface Aided MIMO Communication (2019, methodology): “Furthermore, IRS has been jointly designed with other existing technologies, such as non-orthogonal multiple access (NOMA) [24]–[26], physical-layer security [27]–[31], and simultaneous wireless information and power transfer (SWIPT) [32], [33].”
Exploiting Intelligent Reflecting Surfaces in NOMA Networks: Joint Beamforming Optimization (2019, methodology): “A novel IRS-aided NOMA communication model was proposed in [36], where IRSs were deployed at cell edge regions to maximize the total number of served users.”
Toward Smart Wireless Communications via Intelligent Reflecting Surfaces: A Contemporary Survey (2019, background): “In particular, the capacity gain can be achieved by deploying IRS to assist NOMA transmissions to cell-edge users simultaneously with the other users closer to the BS [138].”
Channel Estimation and Passive Beamforming for Intelligent Reflecting Surface: Discrete Phase Shift and Progressive Refinement (2019, neutral): “multiplexing (OFDM) [14], MIMO [15], [16], non-orthogonal multiple access (NOMA) [17]–[20], physical-layer security”
Joint Active and Passive Beamforming Optimization for Intelligent Reflecting Surface Assisted SWIPT Under QoS Constraints (2019, background): “, physical layer security [10]–[13], non-orthogonal multiple access [15], [16], [20], and millimeter wave (mmWave) communications [21], [22].”