Low Complexity Robust Beamforming for Heterogeneous MIMO Rate-Splitting Multiple Access

• Published in: IEEE transactions on wireless communications Vol. 24; no. 5; pp. 4410 - 4424
• Main Authors: Ando, Kengo, Abreu, Giuseppe Thadeu Freitas de, Gonzalez, G. David, Gonsa, Osvaldo
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.05.2025; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; beamfoming design; Beamforming; Complexity; Complexity theory; Computational efficiency; convex optimization; Downlink; Heterogeneity; Information systems; Interference cancellation; Mathematical programming; Maximization; MIMO; MIMO communication; Multiple access; NOMA; Optimization; Rate-splitting multiple access; Resource management; Robustness; Splitting; Tensors; Vectors

We propose a new two-stage, low-complexity, and robust beamforming (BF) method for heterogeneous MIMO rate splitting multiple access (RSMA) systems. In the proposed method, the phases and powers of the BF weights are designed separately, the first based on a tensor factorization of the channels betw...