论文标题
毫米波多源MIMO系统带有动态子阵列的混合边界成形设计
Hybrid Beamforming Design for Millimeter Wave Multiuser MIMO Systems with Dynamic Subarrays
论文作者
论文摘要
在这封信中，我们调查了毫米波（MMWave）下行链路多源多输入多输出（MU-MIMO）系统，采用了基站的动态子阵列体系结构，并考虑了每个用户的多流通信。为了最大程度地提高系统频谱效率，我们提出了一种新型的混合波束形成设计。首先，假设没有用户间干扰（IUI），我们可以使用每个用户通道和水填充算法的奇异值分解来轻松获得最佳的全数字光束形式和组合器。然后，基于获得的全尺寸波束形式，我们提出了一个Kuhn-Munkres算法算法的动态杂种杂交设计设计，该设计确保每个射频链都连接到至少一个天线。最后，我们建议进一步将每个获得的数字波束形成器投影到所有其他等效用户渠道的空空间中，以取消IUI。数值结果验证了我们提出的杂交波束形成设计的优势。
In this letter, we investigate the millimeter wave (mmWave) downlink multiuser multiple-input multiple-output (MU-MIMO) system, adopting the dynamic subarray architecture at the base station and considering the multi-stream communication for each user. Aiming at maximizing the system spectral efficiency, we propose a novel hybrid beamforming design. First, assuming no inter-user interference (IUI), we easily get the optimal fully-digital beamformers and combiners using the singular value decomposition of each user channel and the waterfilling algorithm. Then, based on the obtained fullydigital beamformers, we propose a Kuhn-Munkres algorithmassisted dynamic hybrid beamforming design, which guarantees that each radio-frequency chain is connected to at least one antenna. Finally, we propose to further project each obtained digital beamformer onto the null space of all the other equivalent user channels to cancel the IUI. Numerical results verify the superiority of our proposed hybrid beamforming design.
