The multiple-input–multiple-output (MIMO) phase of the received signal is the most important parameter in the line-of-sight MIMO (LOS MIMO) system. The MIMO phase turbulence often occurs in practical applications, and the LOS MIMO system cannot operate normally in severe cases. However, there is no practical MIMO phase prediction method presently. A tropospheric radio-duct during phase turbulence was observed using a mesoscale numerical weather prediction (NWP) model. In this study, a novel MIMO phase prediction method was proposed. In the method, the tropospheric refractivity profile was predicted using a mesoscale NWP model, and then MIMO phase was predicted by the parabolic equation model. The comparison of the predicted MIMO phases with the measured results shows good agreement. MIMO phase turbulence prediction method can provide support for LOS MIMO system performance prediction.

中文翻译：

---

大气环境引起的视距多输入多输出链路相位湍流预测方法


接收信号的多输入多输出（MIMO）相位是视距MIMO（LOS MIMO）系统中最重要的参数。实际应用中经常出现MIMO相位扰动，严重时LOS MIMO系统无法正常工作。然而，目前还没有实用的MIMO相位预测方法。使用中尺度数值天气预报（NWP）模型观测到相湍流期间的对流层射电波导。在这项研究中，提出了一种新颖的MIMO相位预测方法。该方法首先利用中尺度数值天气预报模型预测对流层折射率剖面，然后利用抛物线方程模型预测MIMO相位。预测的 MIMO 相位与测量结果的比较显示出良好的一致性。 MIMO相位湍流预测方法可以为LOS MIMO系统性能预测提供支持。