论文标题
6G移动系统中的毫米波和Terahertz通信的初始波束成形
Initial Beamforming for Millimeter-Wave and Terahertz Communications in 6G Mobile Systems
论文作者
论文摘要
为了满足每秒Terabits最高数据速率的需求，下一代移动系统需要利用毫米波和Terahertz频段中的丰富光谱。然而，高频传播在很大程度上依赖大型天线阵列来收获屏蔽型增益，用于补偿严重的传播损失。它在初始访问阶段提出了全面方向波束形成的问题，在该阶段，需要一个基站向其覆盖范围内的所有用户广播同步信号和系统信息。本文提出了一种新颖的初始光束成型方案，该方案通过形成一对互补的束在各个方向上同样提供瞬时增益。数值结果验证它可以实现Omni方向覆盖范围，其最佳性能明显优于先前的方案，称为随机波束形成。它适用于任何形式的大规模阵列，以及所有三个架构，即数字，模拟和混合波束形成。
To meet the demand of supreme data rates in terabits-per-second, the next-generation mobile system needs to exploit the abundant spectrum in the millimeter-wave and terahertz bands. However, high-frequency transmission heavily relies on large-scale antenna arrays to reap high beamforming gain, used to compensate for severe propagation loss. It raises a problem of omni-directional beamforming during the phase of initial access, where a base station is required to broadcast synchronization signals and system information to all users within its coverage. This paper proposes a novel initial beamforming scheme, which provides instantaneous gain equally in all directions by forming a pair of complementary beams. Numerical results verify that it can achieve omni-directional coverage with the optimal performance that remarkably outperforms the previous scheme called random beamforming. It is applicable for any form of large-scale arrays, and all three architecture, i.e., digital, analog, and hybrid beamforming.
