标题： 下行多用户MIMO相干产品叠加 显示英文标题

标题： Coherent Product Superposition for Downlink Multiuser MIMO

摘要： 在两个用户广播信道中，其中一个用户具有完整的CSIR，另一个用户则没有，最近的结果表明TDMA是严格次优的，一种需要非相干信令的产品叠加在许多天线配置下实现了DoF增益。 这项工作引入了在使用导频的相干信号领域中的产品叠加，展示了产品叠加在低SNR以及高SNR下的优势，并在更广泛的接收机天线配置中建立了DoF增益。 研究了两类解码器，带有和不带有干扰消除的解码器。 通过分析建立了可实现速率，并通过仿真进行了说明。 显示英文摘要

摘要： In a two-user broadcast channel where one user has full CSIR and the other has none, a recent result showed that TDMA is strictly suboptimal and a product superposition requiring non-coherent signaling achieves DoF gains under many antenna configurations. This work introduces product superposition in the domain of coherent signaling with pilots, demonstrates the advantages of product superposition in low-SNR as well as high-SNR, and establishes DoF gains in a wider set of receiver antenna configurations. Two classes of decoders, with and without interference cancellation, are studied. Achievable rates are established by analysis and illustrated by simulations.