本文研究多径衰落信号的多重分形性质，分析并指出了信号多重分形维数是描述无线信道传播特性的重要参数；
Fractal characteristic of multipath fading signal is studied in the paper which shows that multifractal dimension is a key parameter for describing the signal propagation in wireless channels.
研究UHF频段的无线电波在矩形、圆形和拱形隧道中的传播特性，推导了衰减常数的计算公式。
Propagation characteristic of UHF radio wave in rectangle, circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.
实际矿井隧道有许多弯曲段，为实现全矿井的无线移动通信，需要知道在弯曲隧道中电磁波的传播特性。
There are many bends in mine tunnels, and it is necessary to know wave propagation characteristic in curved tunnels in order to realize wireless mobile communication of a whole mine.
根据电磁波在无线信道中传播的随机特性，使用随机射线建模电磁波传播。
According to stochastic characteristics of electromagnetic wave propagating in wireless channels, stochastic rays are employed to model electromagnetic wave propagation.
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；
Then, the paper introduced the basic concepts of wireless channel transmission mechanism as well as the characteristics of radio wave propagation in underground tunnels;
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。
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.
首先，文章分析了无线信道的传输特性，对几种常见的衰落进行了具体的介绍。分析了无线信道的传播模型。
First of all, analyze the transmission characteristic of wireless channel, describe in detail several types of common attenuation and give the transmission model of wireless channel.
首先，文章分析了无线信道的传输特性，对几种常见的衰落进行了具体的介绍。分析了无线信道的传播模型。
First of all, analyze the transmission characteristic of wireless channel, describe in detail several types of common attenuation and give the transmission model of wireless channel.
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