An ultra-massive phased array can be deployed in high-throughput millimeter-wave (mmWave) communication systems to increase the transmission distance. However, when the signal bandwidth is large, the antenna array response changes with the frequency, causing beam squint. In this paper, we investigate the beam squint effect on a high-throughput mmWave communication system with the single-carrier frequency-domain equalization transmission scheme. Specifically, we first view analog beamforming and the physical channel as a spatial equivalent channel. The characteristics of the spatial equivalent channel are analyzed which behaves like frequency-selective fading. To eliminate the deep fading points in the spatial equivalent channel, an advanced analog beamforming method is proposed based on the Zadoff-Chu (ZC) sequence. Then, the low-complexity linear zero-forcing and minimum mean squared error equalizers are considered at the receiver. Simulation results indicate that the proposed ZC-based analog beamforming method can effectively mitigate the performance loss by the beam squint.

可以在高通量毫米波（mmWave）通信系统中部署超大规模相控阵，以增加传输距离。但是，当信号带宽较大时，天线阵列响应会随频率变化，导致波束斜视。在本文中，我们研究了采用单载波频域均衡传输方案的高通量毫米波通信系统上的光束斜视效应。具体来说，我们首先将模拟波束成形和物理信道视为空间等效信道。分析了等效空间信道的特性，其行为类似于频率选择衰落。为了消除空间等效信道中的深衰落点，提出了一种基于Zadoff-Chu（ZC）序列的高级模拟波束形成方法。然后，在接收机处考虑了低复杂度线性迫零和最小均方误差均衡器。仿真结果表明，所提出的基于ZC的模拟波束形成方法可以有效地减轻斜视造成的性能损失。