Rate-Splitting Multiple Access With Finite Blocklength for Short-Packet and Low-Latency Downlink Communications

Rate-Splitting Multiple Access (RSMA) is an emerging flexible and powerful multiple access for downlink multi-antenna networks. In this paper, we introduce the concept of RSMA into short-packet communications. We design optimal linear precoders that maximize sum rate with Finite Blocklength (FBL) constraints. The relations between blocklength are investigated a wide range network loads user deployments. Numerical results demonstrate can achieve same transmission as Non-Orthogonal (NOMA) Space Division (SDMA) smaller blocklengths (and therefore lower latency), especially in overloaded Hence, conclude promising low-latency