Cell-free (CF) massive multiple-input multiple-output (MIMO) systems, which exploit many geographically distributed access points to coherently serve user equipments via spatial multiplexing on the same time-frequency resource, has become a vital component of the next-generation mobile communication networks. Theoretically, CF massive MIMO systems have many advantages, such as large capacity, great coverage, and high reliability, but several obstacles must be overcome. In this article, we study the paradigm of CF massive MIMO-aided mobile communications, including the main application scenarios and associated deployment architectures. Furthermore, we thoroughly investigate the challenges of CF massive MIMO-aided mobile communications. We then propose a novel predictor antenna, hierarchical cancellation, rate-splitting and dynamic clustering system for CF massive MIMO. Finally, several important research directions regarding CF massive MIMO for mobile communications are presented to facilitate further investigation.
翻译:从理论上讲,无细胞(CF)大规模大型多投入多产出(MIMO)系统有许多优势,如容量大、覆盖面大、可靠性强,但必须克服若干障碍。在本篇文章中,我们研究了由IMO协助的大型CF大型移动通信模式,包括主要应用情景和相关部署结构。此外,我们彻底调查了CF大规模MIMO辅助移动通信的挑战。然后,我们提议为CF大型移动通信建立一个新的预测天线、等级取消、分率和动态集群系统。最后,提出了几项关于CFMIMO大规模移动通信的重要研究方向,以便于进一步调查。