用于短包和低液下行链路通信的具有有限区段长度的速速分多重接入 (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 downlink communications. We design optimal linear precoders that maximize the Weighted Sum Rate (WSR) with Finite Blocklength (FBL) constraints. The relations between the WSR and blocklength of RSMA are investigated for a wide range of network loads and user deployments. Numerical results demonstrate that RSMA can achieve the same transmission rate as Non-Orthogonal Multiple Access (NOMA) and Space Division Multiple Access (SDMA) with shorter blocklengths (and therefore lower latency), especially in overloaded multi-antenna networks. Hence, we conclude that RSMA is a promising multiple access for low-latency communications.

翻译：在本文中,我们将RSMA的概念引入短包装下行通信中,我们设计了最佳线性预译器,以尽量提高有限制的有限区长(FBL)的加权总和率(WSR),对WSR与RSMA的区长之间的关系进行了调查,调查范围很广的网络负荷和用户部署情况。数字结果显示RSMA能够实现与非正统多重接入(NOMA)和空间司多端接入(SDMA)相同的传输率,其轮段长度较短(并因此延长较低),特别是在超载的多段线性网络中。因此,我们得出结论,RSMA是低端通信有希望的多重接入。