We consider globally optimal precoder design for rate splitting multiple access in Gaussian multiple-input single-output downlink channels with respect to weighted sum rate and energy efficiency maximization. The proposed algorithm solves an instance of the joint multicast and unicast beamforming problem and includes multicast- and unicast-only beamforming as special cases. Numerical results show that it outperforms state-of-the-art algorithms in terms of numerical stability and converges almost twice as fast.
@article{arxiv.2102.03071,
title = {Globally Optimal Beamforming for Rate Splitting Multiple Access},
author = {Bho Matthiesen and Yijie Mao and Petar Popovski and Bruno Clerckx},
journal= {arXiv preprint arXiv:2102.03071},
year = {2021}
}
Comments
To be presented at 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2021)