In order to reduce the path loss of the wireless communication signal in the underground tunnel, a scheme for configuring the antenna polarization of wireless systems based on a zone-division method is proposed. A multimodal method is used to estimate the effect of antenna polarization on the wireless propagation. When the optimal polarization of the antenna leading to low path loss is different in the zones near and far from the transmitting antenna, a dividing point is used to separate the zones. Experiments are conducted in an underground mine. It shows that the results by the multimodal method are consistent with the real data. Compared with the existing coverage schemes, the proposed scheme can obtain better coverage. Meanwhile, zone division has an important influence on the optimized performance of the wireless coverage. The zones divided based on Fresnel zone clearance and system identification are too small or too large, which result in incorrect polarization switching and high path loss.

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基于区域划分的地下隧道无线通信覆盖范围的优化

为了减少地下隧道中无线通信信号的路径损耗，提出了一种基于区域划分的无线系统天线极化配置方案。使用一种多模态方法来估计天线极化对无线传播的影响。当导致低路径损耗的天线的最佳极化在靠近和远离发射天线的区域中不同时，将使用一个分隔点来分隔这些区域。实验是在地下矿井中进行的。结果表明，多峰方法的结果与实际数据吻合。与现有的覆盖方案相比，该方案可以获得更好的覆盖范围。同时，区域划分对无线覆盖的优化性能具有重要影响。