论文标题
毫米波和Terahertz通信与混合边界的初步访问
Initial Access for Millimeter-Wave and Terahertz Communications with Hybrid Beamforming
论文作者
论文摘要
为了在第六代（6G）移动系统中达到每秒（TBP）的数据速率，需要无线通信才能利用毫米波（MMWave）和Terahertz（THZ）频段中的丰富光谱。但是，高频传播在很大程度上依赖于远光的增益来补偿严重的传播损失。基于光束的系统在初始访问过程中面临障碍，在该过程中，基站必须向其覆盖范围内的所有用户广播同步信号和系统信息。因此，本文提出了一种新型的全向广播方案，该方案针对MMWave和THZ系统具有混合光束形成。它通过在子阵列上形成互补的光束来立即提供与所有方向相等的增益。数值结果证明它可以实现全向覆盖范围，其性能明显胜过先前的方案。
In order to achieve terabits-per-second (Tbps) data rates in the sixth-generation (6G) mobile system, wireless communications are required to exploit the abundant spectrum in the millimeter-wave (mmWave) and terahertz (THz) bands. However, high-frequency transmission heavily relies on high beamforming gain to compensate for severe propagation loss. A beam-based system faces a barrier in the process of initial access, where a base station must broadcast synchronization signals and system information to all users within its coverage. Hence, this paper proposes a novel omnidirectional broadcasting scheme for mmWave and THz systems with hybrid beamforming. It provides an instantaneously equal gain over all directions by forming complementary beams over sub-arrays. Numerical results verify that it can achieve omnidirectional coverage with a performance that remarkably outperforms the previous scheme.
