论文标题
横梁斜视协助用户在近场通信系统中的本地化
Beam Squint Assisted User Localization in Near-Field Communications Systems
论文作者
论文摘要
最近广泛关注了大量多输入和多输出宽带通信中的梁蹲现象，这通常会恶化光束成形的性能。在本文中，我们发现，借助时间延迟线（TDS），可以自由控制近场通信系统的梁斜视的范围和轨迹，因此可以将光束斜视用于用户本地化。我们得出了近场梁斜视点的轨迹方程，并设计了一种控制这些梁斜视点的轨迹的方法。通过拟议的设计，来自不同子载波的波束形成将故意指向不同的角度和不同的距离，从而使来自不同位置的用户在不同的子载波处接收最大功率。因此，可以简单地从横梁斜视效果中找到不同用户的位置。仿真结果证明了所提出的方案的有效性。
The beam squint phenomenon in massive multi-input and multi-output wideband communications has been widely concerned recently, which generally deteriorates the beamforming performance. In this paper, we find that with the aid of the time-delay lines (TDs), the range and trajectory of the beam squint of a near-field communications system can be freely controlled, and hence it is possible to reversely utilize the beam squint for user localization. We derive the trajectory equation for near-field beam squint points and design a way to control the trajectory of these beam squint points. With the proposed design, beamforming from different subcarriers would purposely point to different angles and different distances such that users from different positions would receive the maximum power at different subcarriers. Hence, one can simply find the different users' position from the beam squint effect. Simulation results demonstrate the effectiveness of the proposed scheme.
