Hybrid analog and digital BeamForming (HBF) is one of the enabling transceiver technologies for millimeter Wave (mmWave) Multiple Input Multiple Output (MIMO) systems. This technology offers highly directional communication, which is able to confront the intrinsic characteristics of mmWave signal propagation. However, the small coherence time in mmWave systems, especially under mobility conditions, renders efficient Beam Management (BM) in standalone mmWave communication a very difficult task. In this paper, we consider HBF transceivers with planar antenna panels and design a multi-level beam codebook for the analog beamformer comprising flat top beams with variable widths. These beams exhibit an almost constant array gain for the whole desired angle width, thereby facilitating efficient hierarchical BM. Focusing on the uplink communication, we present a novel beam training algorithm with dynamic beam ordering, which is suitable for the stringent latency requirements of the latest mmWave standard discussions. Our simulation results showcase the latency performance improvement and received signal-to-noise ratio with different variations of the proposed scheme over the optimum beam training scheme based on exhaustive narrow beam search.
翻译:模拟和数字介质模拟和数字介质BeamForming(HBF)是用于毫米波(mmWave)多输入多输出(MIMO)系统的赋能收发器技术之一。该技术提供了高度定向的通信,能够应对毫米Wave信号传播的内在特征。然而,毫米Wave系统中的小型一致性时间,特别是在流动条件下,使得独立毫米波段通信中的高效Beam管理(BM)成为一项非常困难的任务。在本文件中,我们认为HBF带有平面天线板板的转发器,为模拟波束设计一个多级波束代码手册,由不同宽的平面波束组成。这些光束显示整个理想角宽度几乎始终有阵列增益,从而方便了高效的等级BM。侧重于上行通信,我们提出了一个具有动态波段定序的新型波束培训算法,适合最新毫米Wave标准讨论的严格拉伸缩要求。我们的模拟结果展示了Latency性性工作改进,并收到了信号到波段比比,拟议计划在最优化的精确的系统上进行搜索。