The main contents of the thesis are displayed as follows: 1. Wireless channel model has been established by analyzing the signal propagation characteristics in wireless channel.
论文主要工作有：1。通过分析信号在无线信道的传播特性，建立了无线信道模型。
Then, the paper introduced the basic concepts of wireless channel transmission mechanism as well as the characteristics of radio wave propagation in underground tunnels;
然后介绍了无线信道的传播机制基本概念以及井下巷道电波传播特性；
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