In this correspondence, we study deploying movable antenna (MA) array in a wideband multiple-input-single-output (MISO) communication system, where near-field (NF) channel model is considered. To alleviate beam squint effect, we propose to maximize the minimum analog beamforming gain across the entire wideband spectrum by appropriately adjusting MAs' positions, which is a highly challenging task. By introducing a slack variable and adopting the cutting-the-edge smoothed-gradient-descent-ascent (SGDA) method, we develop algorithms to resolve the aforementioned challenge. Numerical results verify the effectiveness of our proposed algorithms and demonstrate the benefit of utilizing MA array to mitigate beam squint effect in NF wideband system.

翻译：本文研究了在考虑近场信道模型的宽带多输入单输出通信系统中部署可移动天线阵列的问题。为缓解波束斜视效应，我们提出通过优化调整可移动天线的位置，最大化整个宽带频谱范围内的最小模拟波束赋形增益，这是一个极具挑战性的任务。通过引入松弛变量并采用边缘切割平滑梯度下降上升法，我们开发了解决上述挑战的算法。数值结果验证了所提算法的有效性，并证明了利用可移动天线阵列抑制近场宽带系统中波束斜视效应的优势。