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.
从该电子密度模式和电离层波传播特性出发确定多径分量，计算短波信道相干带宽。
The coherence bandwidth of shortwave channel is calculated by using the density profile and wave propagation features in ionosphere.
从随机桥过程出发引入随机波束概念，使用随机波束研究超宽带(uwb)室内多径信道的传播特性。
Based on stochastic bridge processes, an idea of stochastic beams is introduced, which can be used to exploit the propagation characteristics of Ultra-wideband (UWB) indoor multipath channels.
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.
定义了传播特性(信道参数)以及同频小区的位置。
The definition of the propagation characteristics (channel parameters), as well as with the frequency of residential location.
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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