Diab R, Krishnamoorthy A, Schober R (2022)
Publication Type: Conference contribution
Publication year: 2022
Publisher: Institute of Electrical and Electronics Engineers Inc.
Pages Range: 586-591
Conference Proceedings Title: 2022 IEEE International Conference on Communications Workshops, ICC Workshops 2022
Event location: Seoul, KOR
ISBN: 9781665426718
DOI: 10.1109/ICCWorkshops53468.2022.9814475
In this paper, we consider the precoder design for downlink multiple-input multiple-output (MIMO) rate-splitting multiple access (RSMA) systems. The proposed scheme with simultaneous diagonalization (SD) decomposes the MIMO channel matrices of the users into scalar channels via higher-order generalized singular value decomposition for the common message (CM) and block diagonalization (BD) for the private messages, thereby enabling low-complexity element-by-element successive interference cancellation (SIC) and decoding at the receivers. Furthermore, the proposed SD MIMO-RSMA overcomes a critical limitation in RSMA systems, whereby the achievable rate of the CM is restricted by the users with weak effective MIMO channel for the CM, by excluding a subset of users from decoding the CM. We formulate a non-convex weighted sum rate (WSR) optimization problem for SD MIMO-RSMA and solve it via successive convex approximation to obtain a locally optimal solution. Our simulation results reveal that, for both perfect and imperfect CSI, the proposed SD MIMO-RSMA with user exclusion outperforms baseline MIMO-RSMA schemes and linear BD precoding.
APA:
Diab, R., Krishnamoorthy, A., & Schober, R. (2022). Precoding and Decoding Schemes for Downlink MIMO-RSMA with Simultaneous Diagonalization and User Exclusion. In 2022 IEEE International Conference on Communications Workshops, ICC Workshops 2022 (pp. 586-591). Seoul, KOR: Institute of Electrical and Electronics Engineers Inc..
MLA:
Diab, Rouaa, Aravindh Krishnamoorthy, and Robert Schober. "Precoding and Decoding Schemes for Downlink MIMO-RSMA with Simultaneous Diagonalization and User Exclusion." Proceedings of the 2022 IEEE International Conference on Communications Workshops, ICC Workshops 2022, Seoul, KOR Institute of Electrical and Electronics Engineers Inc., 2022. 586-591.
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