Improper Gaussian signaling on the common stream in RSMA outperforms proper Gaussian signaling for rates when successive interference cancellation is imperfect, with closed-form optima derived for some objectives and a reinforcement learning algorithm for sum-rate maximization.
Optimization of rate allocation and power control for rate splitting multiple access (RSMA),
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Utilizing Improper Gaussian Signaling for Downlink Rate-Splitting Multiple Access with Imperfect Successive Interference Cancellation
Improper Gaussian signaling on the common stream in RSMA outperforms proper Gaussian signaling for rates when successive interference cancellation is imperfect, with closed-form optima derived for some objectives and a reinforcement learning algorithm for sum-rate maximization.