Li, H, Shen, S and Clerckx, B
(2024)
Synergizing Beyond Diagonal Reconfigurable Intelligent Surface and Rate-Splitting Multiple Access.
IEEE Transactions on Wireless Communications, PP (99).
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Abstract
This work focuses on the synergy of rate-splitting multiple access (RSMA) and beyond diagonal reconfigurable intelligent surface (BD-RIS) to enlarge the coverage, improve the performance, and save on antennas. Specifically, we employ a multi-sector BD-RIS modeled as a prism, which can achieve highly directional full-space coverage, in a multiuser multiple input single output communication system. With the multi-sector BD-RIS aided RSMA model, we jointly design the transmit precoder and BD-RIS matrix under the imperfect channel state information (CSI) conditions. The robust design is performed by solving a stochastic average sum-rate maximization problem. With sample average approximation and weighted minimum mean square error-rate relationship, the stochastic problem is transformed into a deterministic one with multiple blocks, each of which is iteratively designed. Simulation results show that multi-sector BD-RIS aided RSMA outperforms space division multiple access schemes. More importantly, synergizing multi-sector BD-RIS with RSMA is an efficient strategy to reduce the number of active antennas at the transmitter and the number of passive antennas in BD-RIS.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Prevention |
| Divisions: | Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 12 Feb 2024 09:48 |
| Last Modified: | 15 Mar 2024 20:28 |
| DOI: | 10.1109/TWC.2024.3353596 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3178599 |
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