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This paper investigates rate-splitting (RS) precoding for non-orthogonalunicast and multicast (NOUM) transmissions using fully-digital and hybridprecoders. We study the nonconvex weighted sum-rate (WSR) maximization problemsubject to a multicast requirement. We propose FALCON, an approach based onsequential parametric optimization, to solve the aforementioned problem. Weshow that FALCON converges to a local optimum without requiring judiciousselection of an initial feasible point. Besides, we show through simulationsthat by leveraging RS, hybrid precoders can attain nearly the same performanceas their fully-digital counterparts under certain specific settings.

Sequential Parametric Optimization for Rate-Splitting Precoding in Non-Orthogonal Unicast and Multicast Transmissions